An enzyme is which of the following? A- an acid B- an amino nucleotide C- a biological catalyst D- an atom

QUESTION POSTED AT 18/01/2020 - 05:38 AM

Answered by admin AT 18/01/2020 - 05:38 AM

The answer is C: a biological catalyst
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Related questions

Amylase becomes denatured at a temperature of 80°C. During an experiment to study the effect of varying temperature on enzyme activity, amylase's reactivity with starch was measured at body temperature (37°C), and then again at an increased temperature of 42°C. How would this increase in temperature affect the experiment? A) The reaction will stop. B) The enzyme would become inactive. C) The rate of reaction will increase. D) The rate of reaction will decrease.

C, When you want to dissolve salt or sugar into water, it dissolves easier and faster in hot water than cold water. he increase in temperature affects the experiment in such a way that amylase does not efficiently break down starch than it was in normal body temperature (37°C). This is because the structure of amylase will change, thus it cannot interact well with starch than its original structure at  37°C.

ANSWERED AT 16/02/2020 - 07:06 PM


QUESTION POSTED AT 16/02/2020 - 07:06 PM

I need help with five multiple choice marine science questions. 1)When severe weather damages the plant life in an ecosystem, what effects might this have on other organisms in the same ecosystem? a)- Other organisms could starve or have to leave the area if they depend on the plants as food. b) -Other organisms could change their behavior to take the place of the plants in the ecosystem. c )-Other organisms would not be affected. d )-Other organisms could replace the plant energy with radiant energy from the sun. 2)As the climate changes, the average ocean temperature is rising. Using this information, predict what will most likely happen to El Niño events in the future. a)-El Niño events will intensify because they rely on warmer water sinking to the seafloor. b)-El Niño events will intensify because they will build on the already warm waters at the equator. c)-Some El Niño events will be stronger, but most will be weaker because the ocean currents are unpredictable. d)-El Niño events will become more similar to La Niña events and establish a new weather pattern. 3)Which of the following examples is the most likely way severe weather can negatively affect the biodiversity of a marine ecosystem? a)-A severe thunderstorm brings rain and wind to an intertidal zone. b)-A storm surge from a hurricane floods a coastal area. c)-A tornado causes a waterspout. d)-A blizzard adds snow and ice to an arctic glacier. 4)El Niño events are characterized by warmer than normal ocean temperatures near the equator in the Pacific Ocean. Which weather events are most likely to occur as a result? a)- Increased rainfall across the eastern Pacific Ocean b)-Decreased flooding across the eastern Pacific Ocean c)-Drought along the South American Pacific coastline d)-Colder winter along the South American Pacific coastline 5)According to the Severe Weather Activity worksheet, El Niño events most likely occurred during which of the following years? a)-2006 and 2015 b)-1997, 2006, and 2015 c)-1997 and 2015 d)-1997 and 2006

1. The answer is A. The eradication of plants in an ecosystem would devastate the food web in the habitat. This is because plants are primary producers and significant as conduits of energy into a food web. Plants convert radiant energy from the sun to biomass through photosynthesis. This energy then transferred up the food chain through various form of interaction such as predation.

2. The answer is B. Global warming causes water at the equator to be even warmer above normal temperatures. This fans the upwelling of cold water from below the ocean floor and causes an even greater disparity of temperatures across the Pacific ocean. This subsequently fans the trade winds hence warming the air even more and causing severe storms.

3. The answer is B. The flooding of the coastal area due to hurricanes destroys the biodiversity of the ecosystem by physically destroying the habitat and by drowning organisms such as affecting a whole species population. This upsets the balance of the ecosystem and makes it prone to even further deterioration.

4. The answer is A. When the surface ocean waters at the Pacific ocean warm at the equator, there is an upwelling of cooler ocean waters from the bottom of the ocean., The warm currents along with trade move towards the east and met the South American coastline where they bring in heavy rainfall. Conversely, the northwestern region of the Pacific experiences drought.

5. The answer is C. Elnino and La Nina occurs at a frequency of approximately two(2) to seven (7) years. The phenomenon usually lasts nine (9) to twelve (12) months. El Ninos are more frequent than La Ninas. Their peak effect is usually felt around December and January. The strongest El Nino was the one that occurred in 1997.

ANSWERED AT 16/02/2020 - 07:04 PM


QUESTION POSTED AT 16/02/2020 - 07:04 PM

1. Restriction enzymes are naturally occurring proteins genetically engineered proteins enzymes that cut proteins B then C A then C 2. Plasmids can be used to cut DNA can be used to insert DNA into bacteria can be used to digest proteins A and C All of the above 3. Name the technique used to increase a quantity of DNA. plastid technology genetic engineering PCR RNA Recombinant DNA technology 4. What tool does one use to separate DNA fragments? an electron microscope a cyclotron a mass spectrograph a Polyacrylamide gel a centrifuge (high speed) 5. DNA fragments hav 1. Restriction enzymes are naturally occurring proteins genetically engineered proteins enzymes that cut proteins B then C A then C 2. Plasmids can be used to cut DNA can be used to insert DNA into bacteria can be used to digest proteins A and C All of the above 3. Name the technique used to increase a quantity of DNA. plastid technology genetic engineering PCR RNA Recombinant DNA technology 4. What tool does one use to separate DNA fragments? an electron microscope a cyclotron a mass spectrograph a Polyacrylamide gel a centrifuge (high speed) 5. DNA fragments hav ...?

1. Restriction enzymes are

A then C

2. Plasmids

can be used to insert DNA into bacteria


3. Name the technique used to increase a quantity of DNA.

PCR


4. What tool does one use to separate DNA fragments?

a Polyacrylamide gel

Hope this answers the question. Have a nice day.

ANSWERED AT 16/02/2020 - 06:46 PM


QUESTION POSTED AT 16/02/2020 - 06:46 PM

Some biology students wanted to determine whether a pair of brown mice purchased at a pet store was homozygous dominant or heterozygous for fur color. They let the mice mate and examined the offspring. Six mice were born. All six had brown fur. Some of the students felt that this was enough evidence to prove that the mice were homozygous for brown fur color. Other students did not, so another experiment was planned. Describe the next experiment the students could conduct to determine whether the parent mice are homozygous brown or heterozygous. Explain your answer. ...?

Mark me brainiest answer is b

How does natural selection change the frequency of genes or traits over many generations? Biology students conducted an experiment mimicking genetic variation and coloration. Students used different colored beans to represent animals that might be prey: mice, for example. A student in each group was the predator: a hawk. Beans (mice) were randomly scattered on multicolored floor tiles, each color within four tiles. The hawk collected mice (beans) for 10 seconds. Mice not eaten reproduced. Three generations of data a shown in the table.

 Speckled and striped beans (mice) had the best survival rates. Why?

A) They reproduced very rapidly.  

B) Coloration was a form of camouflage.  

C) They mimicked other mice and were spared.  

D) The speckled and striped beans had a wider range.  

ANSWERED AT 16/02/2020 - 06:37 PM


QUESTION POSTED AT 16/02/2020 - 06:37 PM

A.) List one organism classified in kingdom Animalia and one organism classified in kingdom Fungi b.) Describe two similarities between the two organisms. c.) Describe two differences between the two organisms. ...?

A. Kingdom Animalia: Dogs
    Kingdom Fungi     : Molds
B. Both dogs and molds are eukaryotic- multicellular and do not produce their own food.
C. They have different structures when it comes to physical appearance.The major difference between them is their ability to move - animals are capable of free movement while fungi yes they can but not as much as the animals.

ANSWERED AT 16/02/2020 - 06:34 PM


QUESTION POSTED AT 16/02/2020 - 06:34 PM

The _____ root helps stabilize soil from erosion. A) Fibrous B) Taproot

Answer: A. Fibrous

A fibrous root is a root system that is found in the monocotyledonous plants. This root system forms extensive branching of the thin roots below the stem. This root system develop like a mat underground when the tree attains complete maturity, because of a mat like structure and strong holding capacity on the soil this root system helps in preventing the soil erosion.

ANSWERED AT 16/02/2020 - 06:02 PM


QUESTION POSTED AT 16/02/2020 - 06:02 PM

You visit a farm and notice that white chickens lay white eggs and colored chickens lay brown eggs, so you decide that only white chickens lay white eggs. What type of reasoning is this? a) inductive b) deductive

Answer

Inductive

Explanation

Its a logical process in which a number of premises  all believed true or sometimes found  true most of the time and combined to come up with specific conclusions. Its mostly used in applications that do involve  behavior, forecasting and makes broader generalization that is considered probable. For example a speculation that all crows are black and each time a new crow is observed  and found out that its black the assumption is increasingly confirmed. On the other hand if the crow is found not to be black then the assumption's found to be false..

ANSWERED AT 16/02/2020 - 05:29 PM


QUESTION POSTED AT 16/02/2020 - 05:29 PM

A group of hikers find a fallen tree in a forest. The dead tree trunk is covered by mushrooms and other fungus. Later, they find a wild apple tree with many apples lying on the forest floor beneath the tree. The apples are all rotten and decayed by bacteria. Which statement BEST summarizes how these fungus and bacteria organisms are obtaining their food energy? A) The fungus and bacteria are both parasitic organisms that obtain food from other living organisms. B) The fungus and bacteria are both obtaining their energy by manufacturing food from minerals and sunlight. C) Both fungus and bacteria require well-fertilized soil in which to obtain nutrients needed for chemosynthesis. D) The fungus and bacteria organisms are obtaining the energy they need by decomposing organic matter like dead trees and old apples. Eliminate

Answer: D. The fungus and bacteria organisms are obtaining the energy they need by decomposing organic matter like dead trees and old apples.

Fungi is the primary decomposer of biological waste in forest ecosystem. Fungi grows on the branching network of hyphae which provide it more penetration potential towards the litter. Wood decaying fungi has enzymes required for decomposition of lignin, a chemical substance found in wood. Fungi decompose organic matter by releasing enzymes which breaks down the decaying matter, after that they absorb the nutrients in the decaying material. The left residue in the organic matter includes sugars and amino acids are degraded and decomposed by the bacteria.

ANSWERED AT 16/02/2020 - 04:05 PM


QUESTION POSTED AT 16/02/2020 - 04:05 PM

Which one of these is not an example of intracellular communication A. Molecule in a cell changes function of cell B. Control of cell division C. Molecular movement within a cell D. Reaction to pheromones

Answer:

The answer is Reaction To Pheromones

Explanation:

This is not an example of intracellular communication because Airborne molecules that elicit a reaction in a member of the same species are called pheromones, and the most famous ones are potent aphrodisiacs, like androstenone and androstenol in the saliva of male boars.

ANSWERED AT 16/02/2020 - 03:45 PM


QUESTION POSTED AT 16/02/2020 - 03:45 PM

Which variable stars have pulsation periods between 1.5 hours and 1.2 days? A. Cepheid variables B. RR Lyrae variables C. Protostars D. Quasars

The answer would be B) RR Lyrae Variables.

ANSWERED AT 16/02/2020 - 06:35 AM


QUESTION POSTED AT 16/02/2020 - 06:35 AM

What Occurs Along A Plate Boundary? A) Earthquakes B) Hot Spots C) Deep-Sea Ridges D) Rugged Mountain Ranges

The answer is C) Deep-Sea Ridges 

ANSWERED AT 16/02/2020 - 06:01 AM


QUESTION POSTED AT 16/02/2020 - 06:01 AM

_____ occur when two _____ meet. A) Air masses, fronts B) Fronts, air masses C) Cyclones, fronts D) Fronts, clouds

Answer: B) Fronts, air masses

When the air masses meet fronts are formed. These fronts reflects the weather condition of a region.  

Cold front forms when a cold air mass slides under a warm air mass, resulting in the warm air mass to rise above. This is responsible for cold weather conditions.  

Warm front forms when a moist warm air mass slides over the cold air mass. This is responsible for gentle rain and snow.

Stationary front is forms when warm and cold air neither meet nor able to displace each other. These air masses remain in the stationary condition. This is responsible for cloud formation and precipitation.  

Occluded front is formed when a warm air mass gets caught between two cold air masses. This is responsible for strong wind and heavy precipitation.  

ANSWERED AT 16/02/2020 - 12:37 AM


QUESTION POSTED AT 16/02/2020 - 12:37 AM

occurs naturally between organisms living in an environment with limited resources. A. Competition B. Symbioses C. Logistic D. Exponential

A.competition would be the correct answer I believe

ANSWERED AT 16/02/2020 - 12:34 AM


QUESTION POSTED AT 16/02/2020 - 12:34 AM

A molecule of one atom of carbon and two atoms of oxygen would be written _____. CO2 CO2 Co2 2CO

It would be CO2

Hope I helped!

ANSWERED AT 16/02/2020 - 12:12 AM


QUESTION POSTED AT 16/02/2020 - 12:12 AM

PLZZ HELP FASSSSST 1. Which of the following eyects would you expect if red blood cells were shaped like neurons? (1 point) They would not be able to move as easily through capillaries. They would more easily carry out gas exchange in the alveoli. They would not need to be transported through the body. They would become more eyective at picking up urea discarded by body cells. 2. Which of the following is not a function of the skeletal system? (1 point) supports the body works with other body systems to allow movement manufactures new blood cells sends signals to the brain 3. Which of the following body systems are involved in the first line of defense of the immune system against infection? (1 point) integumentary, digestive, respiratory nervous, circulatory, skeletal muscular, endocrine, urinary urinary, skeletal, integumentary 4. Which of the following sets of structures would be involved in ridding the body of unwanted urea? (1 point) sensory neuron, interneuron, spinal cord alveoli, atrium, cilia capillary, nephron, ureter brain, esophagus, small intestine 5. An infectious disease is a disease that (1 point) is caught because the weather turns cold. is caused by pathogens. can be spread only by bacteria. cannot be cured. 6. Which of the following statements is true regarding infectious agents? (1 point) Infectious agents are all too small to be seen without a microscope, and none can be classified as living. All infectious agents are living because they are all classified as microorganisms. Of all the infectious agents, only viruses are considered living because they actively inject their DNA or RNA into host cells. Viruses cannot be treated with antibiotics because they are not living organisms. 7. Which discovery in the 1800s led to the development of germ theory? (1 point) Vaccines could prevent a disease. Antibiotics exist that can be given to counteract an infection. Infection rates decline when health care professionals wash their hands in between seeing patients. Some diseases, such as cancer, are caused by chemical factors. 8. Follow a carbon atom in a piece of bread eaten by a boy. Which of the following describes a path that this atom could take? (1 point) mouth esophagus stomach large intestine blood body cell mouth esophagus stomach small intestine blood body cell mouth large intestine esophagus stomach blood body cell mouth esophagus small intestine stomach blood body cell 9. Which of the following sets of structures is innervated by the somatic nervous system? (1 point) esophagus, stomach, small intestine atrium, ventricle, arteries biceps, triceps, quadriceps diaphragm, bladder, large intestine 10. Which of the following cell types would you expect to increase in number azer a person becomes infected with a pathogen? (1 point) sensory neurons white blood cells epidermal cells red blood cells

I got the first 3 the answers are A,D, and C good luck with the rest

ANSWERED AT 16/02/2020 - 12:10 AM


QUESTION POSTED AT 16/02/2020 - 12:10 AM

Pahoehoe is a. cooler, slower-moving lava. b. fast-moving, hot lava. c. volcanic ash. d. lava with a rough, chunky surface.

Answer: b. Fast-moving, hot lava.

Explanation:

  • A lava flow is the outpouring of the lava which is formed due to a non-explosive eruption which is effusive in nature.
  • The word Pahoehoe is derived from a Hawaiian word which means smooth and unbroken.
  • Pahoehoe is a type of lava flow which is fast-moving and hot.
  • This type of lava flow is characterized by low viscosity and a smooth flow which looks like rope coils.

ANSWERED AT 16/02/2020 - 12:09 AM


QUESTION POSTED AT 16/02/2020 - 12:09 AM

Which of Mendel’s laws or principles of inheritance can be explained by the diagram? A) dominance B) independent assortment C) segregation D) genetics

C) segregation because The principles that govern heredity were discovered by a monk named Gregor Mendel in the 1860's. One of these principles, now called Mendel's law of segregation, states that allele pairs separate or segregate during gamete formation, and randomly unite at fertilization.

ANSWERED AT 16/02/2020 - 12:07 AM


QUESTION POSTED AT 16/02/2020 - 12:07 AM

What type of molecule is represented by the model below? 1Carbohydrate 2Steroid 3Fat 4Nucleic acid

The answer would be A. carbohydrate

ANSWERED AT 16/02/2020 - 12:05 AM


QUESTION POSTED AT 16/02/2020 - 12:05 AM

If two parents whose blood types are both B produce a child that has blood type O, what can you say about the parents genotype?

Both parents would have to be heterozygous. Their genotypes would be either BO and BO, or IBi and IBi.
(Each parent has one B allele, and one O or 'no antigen' allele.)

ANSWERED AT 16/02/2020 - 12:05 AM


QUESTION POSTED AT 16/02/2020 - 12:05 AM

In the modern quantum-based atomic theory, what is the name given to a particular space around the nucleus in which an electron moves?

The space around the nucleus in which an electron moves is called the electron  cloud. You could also say Orbital.

ANSWERED AT 16/02/2020 - 12:02 AM


QUESTION POSTED AT 16/02/2020 - 12:02 AM

A doctor is exploring some tissues with a blunt probe. she notices that the tissue is white and fatty and seems to be concentrated within the spinal cord. she is observing A. gray matter B. Myelin Sheaths

Answer:

The correct answer is option B, that is, myelin sheaths.

Explanation:

Myelin refers to an insulating layer, or a sheath, which get produced surrounding the nerves, comprising those in the spinal cord and the brain. It is formed of fatty substances and protein. This myelin sheath permits electrical impulses to conduct briskly and effectively between the nerve cells.  

The neuron’s myelin sheath comprises the cells containing fat, which shield the axon from electrical activity. The insulation functions to enhance the rate of conduction of signals. The myelin sheath provides the whitish look to the brain's white matter.  

ANSWERED AT 15/02/2020 - 11:56 PM


QUESTION POSTED AT 15/02/2020 - 11:56 PM

Can you change the type of element of an atom

No you cant change the type of element of an atom

ANSWERED AT 15/02/2020 - 11:37 PM


QUESTION POSTED AT 15/02/2020 - 11:37 PM

Minerals containing a useful substance are referred to as a. Gems c. Veins b. Ores d. Quartz

  • Minerals containing a useful substance are referred to as ores.
  • Ores are basically minerals with elements that are economically important to us and thus, the ores are mined to extract the useful substances.
  • More commonly the important elements extracted from these ores are the metals such as copper, iron, lead, zinc, and nickel.
  • The metals can either be present in the ores as oxides, silicates, sulphides or in their native state.

ANSWERED AT 15/02/2020 - 11:26 PM


QUESTION POSTED AT 15/02/2020 - 11:26 PM

Which has prokaryotic cells? A) Human Blood B),Cows Liver C) Onion Root D) Ecoli

The right answer is c) onion

ANSWERED AT 15/02/2020 - 11:23 PM


QUESTION POSTED AT 15/02/2020 - 11:23 PM