WGU C785 BIOCHEMISTRY UNIT EXAM
WITH CORRECT ACTUAL QUESTIONS AND
CORRECTLY WELL DEFINED ANSWERS
LATEST ALREADY GRADED A+ 2025 – 2026
Methyltransferases are up regulated and add methyl groups to the DNA bases
in the legumain gene. - ANSWERS-Nucleosomes are more widely spaced,
exposing the legumain gene.
Increased nucleosome spacing leads to increased transcription and
translation (i.e. gene expression) of the Legumain gene.
Which of the following mRNA sequences can be translated into a peptide
sequence containing two amino acids?
5' - GAU CGA UAG UGG - 3'
5' - GAU CGA UGG UAG - 3'
,5' - UGG UAC CAG UGA - 3'
5' - GAC CAU GCG GGG - 3' - ANSWERS-5' - GAU CGA UAG UGG - 3'
The sequence 5' - GAU CGA UAG UGG - 3' contains a stop codon in the 3rd
position, therefore, this sequence would produce a peptide sequence with
two amino acids.
What is the mRNA sequence that would result from this coding DNA
sequence: 5' - CAG TTA GAT TCA - 3'?
5' - ACU UAG AUU GAC - 3'
5' - CUG TTU GUT TCU - 3'
5' - CAG UUA GAU UCA - 3'
5' - UGA AUC UAA CUG - 3' - ANSWERS-5' - CAG UUA GAU UCA - 3'
The coding DNA and mRNA sequences in transcription will be identical,
except for any T in the coding DNA sequence having a corresponding to U in
the mRNA sequence. The correct answer is 5'-CAG UUA GAU UCA-3'.
What is happening to the pH of the lungs due to exhalation?
CO2 decreases from exhalation, thus the pH of the lungs increases.
,CO2 increases from exhalation, thus the pH of the lungs decreases.
CO2 decreases from exhalation, thus the pH of the lungs decreases.
CO2 increases from exhalation, thus the pH of the lungs increases. -
ANSWERS-CO2 decreases from exhalation, thus the pH of the lungs increases.
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
Hydrogen bonding
Electrostatic interactions - ANSWERS-Hydrogen bonding
The secondary structure of a protein is built by hydrogen bonds between the
carboxyl groups and amino groups on the backbones of the amino acids.
Which amino acid would most likely participate in hydrogen bonds? -
ANSWERS-Amino Acid structure 4
This is a polar, uncharged amino acid due to the OH group on the side chain.
Polar, uncharged amino acids containing oxygen or NH groups make hydrogen
bonds.
Which portion of the amino acid is inside the box?
The box is surrounding the section below the Alpha Carbon - ANSWERS-Side
Chain
WITH CORRECT ACTUAL QUESTIONS AND
CORRECTLY WELL DEFINED ANSWERS
LATEST ALREADY GRADED A+ 2025 – 2026
Methyltransferases are up regulated and add methyl groups to the DNA bases
in the legumain gene. - ANSWERS-Nucleosomes are more widely spaced,
exposing the legumain gene.
Increased nucleosome spacing leads to increased transcription and
translation (i.e. gene expression) of the Legumain gene.
Which of the following mRNA sequences can be translated into a peptide
sequence containing two amino acids?
5' - GAU CGA UAG UGG - 3'
5' - GAU CGA UGG UAG - 3'
,5' - UGG UAC CAG UGA - 3'
5' - GAC CAU GCG GGG - 3' - ANSWERS-5' - GAU CGA UAG UGG - 3'
The sequence 5' - GAU CGA UAG UGG - 3' contains a stop codon in the 3rd
position, therefore, this sequence would produce a peptide sequence with
two amino acids.
What is the mRNA sequence that would result from this coding DNA
sequence: 5' - CAG TTA GAT TCA - 3'?
5' - ACU UAG AUU GAC - 3'
5' - CUG TTU GUT TCU - 3'
5' - CAG UUA GAU UCA - 3'
5' - UGA AUC UAA CUG - 3' - ANSWERS-5' - CAG UUA GAU UCA - 3'
The coding DNA and mRNA sequences in transcription will be identical,
except for any T in the coding DNA sequence having a corresponding to U in
the mRNA sequence. The correct answer is 5'-CAG UUA GAU UCA-3'.
What is happening to the pH of the lungs due to exhalation?
CO2 decreases from exhalation, thus the pH of the lungs increases.
,CO2 increases from exhalation, thus the pH of the lungs decreases.
CO2 decreases from exhalation, thus the pH of the lungs decreases.
CO2 increases from exhalation, thus the pH of the lungs increases. -
ANSWERS-CO2 decreases from exhalation, thus the pH of the lungs increases.
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
Hydrogen bonding
Electrostatic interactions - ANSWERS-Hydrogen bonding
The secondary structure of a protein is built by hydrogen bonds between the
carboxyl groups and amino groups on the backbones of the amino acids.
Which amino acid would most likely participate in hydrogen bonds? -
ANSWERS-Amino Acid structure 4
This is a polar, uncharged amino acid due to the OH group on the side chain.
Polar, uncharged amino acids containing oxygen or NH groups make hydrogen
bonds.
Which portion of the amino acid is inside the box?
The box is surrounding the section below the Alpha Carbon - ANSWERS-Side
Chain
