Questions posted in Biology - AssignmentGrade.com

Questions posted in Biology

How are buffers important to the functioning of living systems?

Enzymes are biological catalysts that help to promote biological chemical reactions in living systems.

Enzymes will have a secondary structure and when there are changes in pH this disrupts the ionic bonds in the secondary structure of the enzyme and therefore will disrupt the enzymes tertiary structure.

The disruption of bonds can cause the enzymes active site to change and therefore it can no longer efficiently carry out its task and so certain metabolic reactions will be affected.

Buffers ensure that the bodies pH remains at a constant that is comfortable and is close to the enzymes optimal pH point to ensure that all metabolic reactions occur properly.

"Buffers react with small amounts of acid and alkali to ensure that pH remains constant"

Hope that helps :)

ANSWERED AT 02/06/2020 - 01:58 AM


QUESTION POSTED AT 02/06/2020 - 01:58 AM

Ringworm is an example of an abnormal condition or disease caused by a fungus, also known as:

Ringworm disease is caused by the infection from the fungus Trichophyton rubrum. This is a communicable disease, and may spread from one person to another by contact. A round red rash may appear during this infection, and it may also be itchy. Antibiotics are used to treat it. 

ANSWERED AT 02/06/2020 - 01:57 AM


QUESTION POSTED AT 02/06/2020 - 01:57 AM

Identify three possible components of a dna nucleotide. identify three possible components of a dna nucleotide. guanine, phosphate group, ribose cytidine, phosphate group, ribose adenine, phosphate group, ribose deoxyribose, phosphate group, uracil deoxyribose, phosphate group, thymine cytosine, phosphate group, ribose

DNA or deoxyribonucleic acid contains the genetic information of a person and usually contains three groups: sugar, phosphate and nucleic acid. Since you are asked to cite three components of the nucleotide, you can use this acronym, Apples in the Tree, Cars in the Garage. 
A - adenine
T - thymine
C - cytosine
G - guanine

ANSWERED AT 02/06/2020 - 01:55 AM


QUESTION POSTED AT 02/06/2020 - 01:55 AM

Tertiary structure is not directly dependent on _____.

Tertiary structure is not directly dependent on [ peptide bonds ]

ANSWERED AT 02/06/2020 - 01:55 AM


QUESTION POSTED AT 02/06/2020 - 01:55 AM

Does this gamete violate the law of independent assortment or the law of segregation

A gamete cannot violate the independent assortment law itself. If Meiosis does not segregate chromosomes appropriately, that would be a violation of the law of segregation. The spindle apparatus is supposed to direct each chromosome of each pair of homologous chromosomes to a different cell during the first meiosis division. If that doesn’t work properly, then both chromosomes go to the same pole (and end up in the same daughter cell) and there’s none of them in the other pole (and in the other daughter cell) – that’s what we call an error of segregation. Those mistaken divisions are either non-viable (the cell does not originate an organism) or deleterious (the living organism has a disorder that represents a clear disadvantage in the fight for existence). So they tend to disappear from one generation to another, as the selection process in evolution selects other organisms instead.

The law of segregation is violated when 2 genes are linked. All gametes have linked genes - it’s just a matter of which 2 genes we are studying, that is to say: if those 2 are linked or not. Linked genes are the ones that are located in the same chromosome – so independent assorement is impossible. This leads to certain combinations of alleles to be clearly more frequent than others – they appear together more than 90% of the times. The exceptions occur when there is crossing over during Prophase I.

ANSWERED AT 02/06/2020 - 01:55 AM


QUESTION POSTED AT 02/06/2020 - 01:55 AM

If a strand of dna has the nitrogen base sequence 5'-atttgc-3', what will be the sequence of the matching strand?

The matching bases would be -taaacg-

ANSWERED AT 02/06/2020 - 01:52 AM


QUESTION POSTED AT 02/06/2020 - 01:52 AM

How people tend to group discrete stimuli together into a meaningful whole are collectively known as the _____?

Laws of grouping, sorry if its wrong, I hope it helped

ANSWERED AT 02/06/2020 - 01:46 AM


QUESTION POSTED AT 02/06/2020 - 01:46 AM

When human abuse of an ecosystem has changed it so much that the ecosystem can no longer return to its previous state, that ecosystem?

Has reached it's tipping point, I think. Your question was not very specific, so hope this helps.

ANSWERED AT 02/06/2020 - 01:45 AM


QUESTION POSTED AT 02/06/2020 - 01:45 AM

__________ are major components of cell membranes, and are said to be __________.

Fats and oils are the major components of cell membranes and are said to be lipids. Lipid is the compound which form the double-layered surface of all cells (lipid bilayer). There are three major classes that membrane lipids are divided into: phospholipids (made of four components: fatty acids, phosphate and alcohol , glycolipids (sugar-containing lipids) and cholesterol (lipid with a structure quite different from that of phospholipids).

ANSWERED AT 02/06/2020 - 01:44 AM


QUESTION POSTED AT 02/06/2020 - 01:44 AM

What is the branch of science that is concerned with the way in which the organism and its parts function?

Either biology or anatomy 

ANSWERED AT 02/06/2020 - 01:42 AM


QUESTION POSTED AT 02/06/2020 - 01:42 AM

This graph shows the velocity of particles A and B through time. The two lines intersect each other at point O. What is the acceleration of particles A and particle B at point O?

The acceleration would be the velocity at point O divided by the time of point O, also known as the slope at point O. (y/x)

ANSWERED AT 02/06/2020 - 01:41 AM


QUESTION POSTED AT 02/06/2020 - 01:41 AM

To determine power we need to know the

Power of what??????????

ANSWERED AT 02/06/2020 - 01:40 AM


QUESTION POSTED AT 02/06/2020 - 01:40 AM

Inflammation of the stomach and small intestine in medical words is

Stomach inflammation is called Gastritis

ANSWERED AT 02/06/2020 - 01:39 AM


QUESTION POSTED AT 02/06/2020 - 01:39 AM

What must be true for natural selection to happen? apex?

For a natural selection to occur, there must be genetic variation by mutations. Application of environmental pressures for adaptation and over-production of the offsprings also allows the occurrence of natural selection. 
Natural selection allows only those organisms to survive, who adapt or change themselves, in accordance with the change in all environmental and physiological conditions. 

ANSWERED AT 02/06/2020 - 01:39 AM


QUESTION POSTED AT 02/06/2020 - 01:39 AM

What stress threatens tissues

Homeostasis threatens these tissues

ANSWERED AT 02/06/2020 - 01:34 AM


QUESTION POSTED AT 02/06/2020 - 01:34 AM

How mutations contribute to genetic diversity.

Mutations contribute to genetic diversity because every time there is a mutation on a chromosome in the DNA it creates a difference in the chromosome, creating genetic diversity.

ANSWERED AT 02/06/2020 - 01:26 AM


QUESTION POSTED AT 02/06/2020 - 01:26 AM

Which reason best explains why dead specimens must be used with transmission electron microscopes?

The TEM  is a form of electron microscope in which an image is derived from electrons that have passed through the specimen, in particular one in which the whole image is formed at once rather than by scanning. The specimen is placed in a vacuum.

ANSWERED AT 02/06/2020 - 01:19 AM


QUESTION POSTED AT 02/06/2020 - 01:19 AM

When NAD+ reacts with hydrogen and gains two electrons, NAD+ is _____.

I think it becomes NADH as it reacts with the hydrogen.

ANSWERED AT 02/06/2020 - 01:18 AM


QUESTION POSTED AT 02/06/2020 - 01:18 AM

Which of the following organisms is most likely to survive? A. the producers in a food web B. the top carnivore in a food chain C. a herbivore in a food chain D. the top carnivore in a food web *Letter A was wrong*

B. the carnivore will most likely survive because it has no natural perpetrators. but unless all of the producers and herbivores get completely wiped out it then it would have no food.

It should be able to survive if it has food.

ANSWERED AT 02/06/2020 - 01:18 AM


QUESTION POSTED AT 02/06/2020 - 01:18 AM

How does an allele cause a trait in an organism?

On each chromosome, there a multiple alleles that stand for different genes/traits.

For example, Chromosome 3 might have a color of eyes, widow's peak, shortness, etc.

ANSWERED AT 02/06/2020 - 01:13 AM


QUESTION POSTED AT 02/06/2020 - 01:13 AM

At which stage of scientific inquiry would scientists find out if their hypotheses were supported by their data?

Most probably the stage of testing. 

ANSWERED AT 01/06/2020 - 05:02 PM


QUESTION POSTED AT 01/06/2020 - 05:02 PM

What is the equivalent temperature in kelvin if you have a metal at 50°F?

The Answer is 283k.....................

ANSWERED AT 01/06/2020 - 04:59 PM


QUESTION POSTED AT 01/06/2020 - 04:59 PM

Why are lichens a good pioneer species after a volcanic eruption?

They are good because they begin the process of primary succession after a natural disaster. 

ANSWERED AT 01/06/2020 - 04:54 PM


QUESTION POSTED AT 01/06/2020 - 04:54 PM

Which organelle breaks down sugar molecules that supply energy ro the cell

The Mitochondria breaks down sugar to supply and power the cell

Remember that the mitochondria is the powerhouse of the cell, without it, the cell wouldn't be able to function

ANSWERED AT 01/06/2020 - 04:48 PM


QUESTION POSTED AT 01/06/2020 - 04:48 PM

What Two substances bind using a lock and key mechanisms

Enzyme and substrate

ANSWERED AT 01/06/2020 - 04:48 PM


QUESTION POSTED AT 01/06/2020 - 04:48 PM