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WGU C785 BIOCHEMISTRY UNIT EXAM QUESTIONS WITH VERY ELABORATED ANSWERS CORRECTRY WELL ORGANIZED LATEST 2024 – 2025 ALREADY GRADED A+ $12.99
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,In order to answer this question, we need to be comfortable with the different
ways we draw molecular structures. Because fatty acids are rather simple (boring,
almost) molecules that have lots of carbon (C) and hydrogen atoms (H), it can get
really tedious to draw them all out in the usual way. To save ourselves the time
and trouble of drawing out all those C's and H's, we simply draw the bonds
between the carbon atoms. This gives us a "zig-zag" structure. We do not need to
draw the hydrogen atoms or the bonds between them since we know that carbon
always makes four bonds to other atoms. If a carbon is shown making two bonds,
for example, with other carbons (one to the carbon ahead of it in the chain and
one to the carbon behind it), then we know it must be making two other bonds to
other atoms. If we do not show those bonds or atoms, we agree that means that
those atoms are hydrogen.
First, we indicate the carbon with the three hydrogens as CH3. Then, the carbon
with two hydrogens is written as CH2. Rather than write out CH2CH2CH2CH2, we
simply put parentheses around that group and the subscript number outside the
parentheses tells us that this occurs 4 times in a row. Next, we come to the
carbons in the double bond, each with one hydrogen. We write this as CH and
show the double bond as =. The next carbon, of course, is also CH. Then we have
another CH2 (but only one, so we don't heed to use parentheses). Then another
double bond CH=CH, and 7 more CH2. Finally, we reach the carboxyl group, which
we write as COOH. Thus, our answer is CH3(CH2)4CH=CHCH2CH=CH(CH2)7COOH
In which situation would altering a protein structure lead to a disease state?
A mutation in starch can lead to increased blood glucose levels.
A mutation in cholesterol can result in heart disease.
,A mutation in an omega-3 fatty acid can cause a skin rash.
A mutation in acetyl-CoA carboxylase can lead to brain damage. - ANSWERS-A
mutation in acetyl-CoA carboxylase can lead to brain damage.
Acetyl-CoA carboxylase is an enzyme, and enzymes are proteins. We know this is
an enzyme because the name ends in "-ase".
Pancreatic enzymes normally have an optimal pH of about pH 8.0 or above. The
pancreatic juices can become acidified in patients with metabolic acidosis.
Pancreatic lipase is an enzyme in pancreatic juice that normally begins the process
of breaking down triglycerides into fatty acids. Which process would be impaired
in patients who have altered pancreatic lipase function?
Protein catabolism
Catabolism of triglycerides
Ketoacidosis
Breakdown of starches by salivary enzymes - ANSWERS-Catabolism of
triglycerides
, Which level of protein structure is determined by the sequence of amino acids?
Secondary structure
Quaternary structure
Tertiary structure
Primary structure - ANSWERS-Primary structure
The primary structure of a protein is simply the sequence of amino acids held
together by peptide bonds.
Which force is most influential in determining the secondary structure of a
protein?
Hydrophobic effect
Disulfide bonding
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