WGU BIOCHEMISTRY OA PRACTICE TEST
2026 TESTED QUESTIONS AND CORRECT
ANSWERS
◉ Hydrophobic interaction
Answer: Mutation of gene for protein that leads to substitution of no
polar amino acid with charged amino acid
◉ Dopamine
Answer: -neurotransmitter
-variety of functions (including motor control)
Parkinson's = decreases dopamine. Sinemet helps by increasing
dopamine levels.
◉ Lactose breaks down into :
Answer: Glucose and galactose
◉ Frameshift mutation
Answer: -insertion or deletion of 1 or 2 nucleotides
◉ Missense mutation
,Answer: -substitution of one amino acid for another
-results in 10 different amino acids or 10 missense mutations
◉ Nonsense mutation
Answer: -premature stop codon incorporated into the sequence
-leads to a shorter protein
◉ Carbohydrates
Answer: -linear
-CH2O formula
-energy=glucose
-structure=cellulose
◉ Lipids
Answer: -energy storage
-signaling
-high amount of C
◉ DNA
Answer: -twisted ladder
-double helix
-in nucleus
, -deoxyribose
-bases= Anine, Thymine, Cytosine, Guarine
-in all molecules
-have nucleotides
◉ RNA
Answer: -plays "messenger"
-in & outside nucleus
-ribose
-Adenine, Uracil, Guarine, Cytosine
-mRNA=messenger (takes message to ribosome)
-rRNA=ribosomal RNA
-tRNA=transfers amino acids
◉ Transcription
Answer: -comes first! Transcribes DNA into message.
(RNA polymerase will connect complementary bases. mRNA can go
out of nucleus to attach to ribosome of rRNA)
◉ How do rising blood CO2 levels promote the deoxygenated
confirmation of hemoglobin?
2026 TESTED QUESTIONS AND CORRECT
ANSWERS
◉ Hydrophobic interaction
Answer: Mutation of gene for protein that leads to substitution of no
polar amino acid with charged amino acid
◉ Dopamine
Answer: -neurotransmitter
-variety of functions (including motor control)
Parkinson's = decreases dopamine. Sinemet helps by increasing
dopamine levels.
◉ Lactose breaks down into :
Answer: Glucose and galactose
◉ Frameshift mutation
Answer: -insertion or deletion of 1 or 2 nucleotides
◉ Missense mutation
,Answer: -substitution of one amino acid for another
-results in 10 different amino acids or 10 missense mutations
◉ Nonsense mutation
Answer: -premature stop codon incorporated into the sequence
-leads to a shorter protein
◉ Carbohydrates
Answer: -linear
-CH2O formula
-energy=glucose
-structure=cellulose
◉ Lipids
Answer: -energy storage
-signaling
-high amount of C
◉ DNA
Answer: -twisted ladder
-double helix
-in nucleus
, -deoxyribose
-bases= Anine, Thymine, Cytosine, Guarine
-in all molecules
-have nucleotides
◉ RNA
Answer: -plays "messenger"
-in & outside nucleus
-ribose
-Adenine, Uracil, Guarine, Cytosine
-mRNA=messenger (takes message to ribosome)
-rRNA=ribosomal RNA
-tRNA=transfers amino acids
◉ Transcription
Answer: -comes first! Transcribes DNA into message.
(RNA polymerase will connect complementary bases. mRNA can go
out of nucleus to attach to ribosome of rRNA)
◉ How do rising blood CO2 levels promote the deoxygenated
confirmation of hemoglobin?
