AnswersPalmer Biology 2026-2027Lab: Building Proteins from RNA

Lab: Building Proteins from RNA — Unit test Answers

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How many genes make up the human genome?

A
four: adenine, thymine, guanine, and cytosine
B
23 pairs of genes
C
20,000–25,000 genes
D
3 billion genes
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The diagram shows a nucleic acid in the shape of a double helix.Which sugar is present in the nucleic acid that is represented in the diagram?

Question illustration
A
phosphate
B
uracil
C
deoxyribose
D
ribose
43

A scientist thinks that a certain chemical is a mutagen. She exposes plant cells to a large amount of this chemical in the laboratory. Which statement best provides evidence that the substance is a mutagen?

A
The cells die within hours of being exposed to the chemical.
B
The cells grow more quickly than those that were not exposed to the chemical.
C
The cells change after being exposed to the chemical, and this change is passed to the next generation of cells.
D
The cells continue to divide at the same rate as before they were exposed to the chemical.
44

Which statement is scientifically based?

A
Mutations rarely occur.
B
All mutations are harmful.
C
Some mutations can be contagious, like infections.
D
Mutations are not passed from parent to offspring.
45

Which describes the function of a peptide bond?'

A
It connects amino acids.
B
It connects ribosomes.
C
It connects tRNA.
D
It connects anticodons.
46

The diagram shows one step in the process of protein synthesis.Which step is shown?

Question illustration
A
transpiration
B
translocation
C
transcription
D
translation
47

What is the role of RNA polymerase?

A
It creates the DNA strand.
B
It bonds the DNA strand.
C
It helps transcribe the DNA strand.
D
It translates the DNA strand.
48

Which occurs during translation?

A
mRNA is created by using a DNA template.
B
mRNA codons are joined by tRNA anticodons to assemble amino acids to form a protein.
C
Protein is formed when a polypeptide chain is broken apart and released from ribosome.
D
One strand of DNA is copied into a strand of rRNA.
49

DNA is a nucleic acid polymer composed of which repeating structural unit?

A
nucleotides
B
phosphate groups
C
ribosomes
D
proteins
50

Which molecule brings amino acids to the ribosomes to be assembled into proteins?

A
tRNA
B
mRNA
C
peptide
D
codon

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