AnswersSTPSB_Biology CR 2627 MitchellLab: Building Proteins from RNA

Week 10 Test Answers

0 verified answers1 views
2
Free Preview

Which process is part of translation but not transcription?

A
A DNA template is used to create an mRNA strand.
B
A tRNA template is used to create a DNA strand.
C
A tRNA template is used to create an mRNA strand.
D
An mRNA template is used to create an amino acid chain.
3

Which is a frameshift mutation?

A
substitution
B
nonsense
C
silent
D
deletion
5

Which best summarizes the process of protein synthesis?

A
RNA instructs DNA to make proteins.
B
DNA unzips, resulting in the formation of two protein molecules.
C
RNA moves the DNA code to the ribosomes for protein synthesis.
D
DNA makes proteins in the nucleus.
6

Maria is concerned because she has been exposed to a small amount of radiation during an X-ray. What is her doctor most likely to tell her?

A
Radiations from X-rays is not a mutagen.
B
Mutagens have no effect on the body unless you have inherited them.
C
Small amounts of a mutagen often do not have an effect on health.
D
Severe mutations are usually caused by small amounts of a mutagen.
8

A forensic scientist is trying to find out the number of adenine bases in the DNA sample that he obtained from a crime scene.What can he assume about the number of adenine?

A
The number of adenine bases will be equal to the number of guanine bases.
B
The number of adenine bases will be equal to the total of all the other bases.
C
The number of adenine bases will be equal to the number of thymine bases.
D
The number of adenine bases will be half of the number of cytosine bases.
9

Which represents a strand of RNA bases?

A
CAAGGTCTC
B
AGGTTCACA
C
CAAGGUCUC
D
TGGAACTCA
11

What can a person do to limit exposure to X-rays?

A
wear sunblock
B
avoid cigarette smoke
C
wear a protective lead vest
D
avoid chemicals
14

What is the function of RNA polymerase in protein synthesis?

A
It brings the tRNA to the ribosome.
B
It bonds the DNA strand.
C
It unzips the DNA strand.
D
It translates the DNA strand.
15

Which best describes genetic mutations?

A
Some inherited genetic mutations can be good for the offspring.
B
Different genetic mutations cause few forms of cancer.
C
Somatic mutations can be inherited from parents or acquired during life.
D
Genetic mutations that cause diseases are always passed on to offspring.
17

Which process is part of transcription?

A
DNA is copied to create a second DNA strand.
B
mRNA codons and tRNA anticodons assemble amino acids.
C
DNA is unzipped with the aid of DNA polymerase.
D
mRNA is synthesized from a strand of DNA.
18

Which statements describe functions of antibodies? Select two options.

A
They maintain the cell’s shape.
B
They regulate cell processes.
C
They protect the body from infectious agents.
D
They signal the immune system to destroy pathogens.
E
They speed up biochemical reactions.
F
They send electrical signals.
19

What did Chargaff discover while studying bases in the DNA of organisms?

A
The bases in the DNA of each organism were unique.
B
The ratios of thymine and adenine were similar, as were the ratios of guanine and cytosine.
C
The overall percentages of bases were different from one organism to the next.
D
There were equal amounts of all four bases in every organism, or 25 percent of each base.
20

Which type of mutation occurs only in reproductive cells?

A
somatic mutation
B
germline mutation
C
point mutation
D
frameshift mutation
21

Which of the following could be a nucleotide of RNA?

A
deoxyribose + phosphate group + thymine
B
deoxyribose + phosphate group + uracil
C
ribose + phosphate group + thymine
D
ribose + phosphate group + uracil

Did you find these answers helpful?