Question 1

Which of the following is TRUE regarding gene expression?

Accepted Answer

A)  Gene expression remains constant throughout an organism's life span.
B)  Different individuals of the same species express all of the same genes.
C)  Gene expression is not influenced by the environment.
D)  Different tissues within an organism express different genes.

Question 2

How many bases are in a codon?

Accepted Answer

A)  3
B)  4
C)  20
D)  64

Question 3

A "mini-gene" has the base sequence TACCCGTGCACG. Which of the following sequences represents a single base substitution?

Accepted Answer

A)  TACCCGTGCACG
B)  TACCCGAGCACG
C)  TACCCGGCACG
D)  TACCCGTGTCACG
E)  TACCGTGCTACG

Question 4

Suppose one strand of a "mini-gene" has the base sequence TACCCGGATTCA. If we assume no introns are involved, how many amino acids does the polypeptide encoded by this gene have?

Accepted Answer

A)  2
B)  4
C)  6
D)  12

Question 5

Which of the following has two polynucleotide strands?

Accepted Answer

A)  ribosomal RNA
B)  DNA
C)  messenger RNA
D)  transfer RNA
E)  RNA polymerase

Question 6

Describe the three basic steps or processes involved in transcription.

Accepted Answer

First, initiation involves RNA polymeras...

Question 7

A gene can be mutated with no resulting functional change in the protein that is produced from that gene if:

Accepted Answer

A)  the mutation alters the active site of an enzyme.
B)  a codon has changed, but it codes for the same amino acid as the original codon.
C)  an entire codon has been removed.
D)  RNA polymerase can edit the mutation from the mRNA produced during translation.

Question 8

List three ways in which an RNA molecule differs from a DNA molecule.

Accepted Answer

RNA is normally single-strande...

Question 9

Which of the following contains codons?

Accepted Answer

A)  ribosomal RNA
B)  DNA
C)  messenger RNA
D)  transfer RNA
E)  RNA polymerase

Question 10

If a bacterial protein is made from 30 amino acids, how many nucleotides are needed to code for its production?

Accepted Answer

A)  30
B)  60
C)  90
D)  120
E)  600

Question 11

A codon of mRNA consists of three bases that code for an amino acid. True or False?

Accepted Answer

A) True 
 B)False

Question 12

What does mRNA carry away from the nucleus?

Accepted Answer

A)  enzymes
B)  ribosomes
C)  information
D)  amino acids
E)  tRNA

Question 13

The genetic code is:

Accepted Answer

A)  different in different organisms.
B)  read in sets of three bases called codons.
C)  used during the translation of DNA to mRNA.

Question 14

The anticodon for AUC is ________.

Accepted Answer

The answer of The anticodon for AUC is ________....

Question 15

Both DNA and RNA:

Accepted Answer

A)  are single-stranded molecules.
B)  contain the same four types of nitrogen-containing bases.
C)  have the same five-carbon sugars.
D)  contain phosphate groups.
E)  cannot be present in a cell simultaneously.

Question 16

Which of the following contains four types of nucleotides but no uracil?

Accepted Answer

A)  ribosomal RNA
B)  DNA
C)  messenger RNA
D)  transfer RNA
E)  RNA polymerase

Question 17

Which of the following is found in RNA but NOT in DNA?

Accepted Answer

A)  adenine
B)  uracil
C)  thymine
D)  phosphate groups
E)  deoxyribose

Question 18

Which of the following attaches to specific amino acids?

Accepted Answer

A)  ribosomal RNA
B)  DNA
C)  messenger RNA
D)  transfer RNA
E)  RNA polymerase

Question 19

A gene mutation is defined as change in the:

Accepted Answer

A)  nucleotide sequence of RNA.
B)  nucleotide sequence of DNA.
C)  activation of a gene.
D)  structure of ribosomes.

Question 20

If the sequence of bases in a section of DNA is TAGGCTAA, what is the corresponding sequence of bases in mRNA?

Accepted Answer

A)  ATCCGATT
B)  TAGGCTAA
C)  CGAAUCGG
D)  AATCGGAT
E)  AUCCGAUU

Exam 12: Gene Expression and Regulation

A "mini-gene" has the base sequence TACCCGTGCACG. Which of the following sequences represents a single base substitution?

Correct AnswerverifiedShow Answer

What does mRNA carry away from the nucleus?

Correct AnswerverifiedShow Answer

Which of the following is TRUE regarding gene expression?

Correct AnswerverifiedShow Answer

How many bases are in a codon?

Correct AnswerverifiedShow Answer

Which of the following contains codons?

Correct AnswerverifiedShow Answer

The genetic code is:

Correct AnswerverifiedShow Answer

A codon of mRNA consists of three bases that code for an amino acid. True or False?

Correct AnswerverifiedShow Answer

Which of the following contains four types of nucleotides but no uracil?

Correct AnswerverifiedShow Answer

A gene can be mutated with no resulting functional change in the protein that is produced from that gene if:

Correct AnswerverifiedShow Answer

Describe the three basic steps or processes involved in transcription.

Correct AnswerverifiedFirst, initiation involves RNA polymeras...View AnswerShow Answer

Which of the following is found in RNA but NOT in DNA?

Correct AnswerverifiedShow Answer

The anticodon for AUC is ________.

Correct AnswerverifiedShow Answer

List three ways in which an RNA molecule differs from a DNA molecule.

Correct AnswerverifiedRNA is normally single-strande...View AnswerShow Answer

Suppose one strand of a "mini-gene" has the base sequence TACCCGGATTCA. If we assume no introns are involved, how many amino acids does the polypeptide encoded by this gene have?

Correct AnswerverifiedShow Answer

Both DNA and RNA:

Correct AnswerverifiedShow Answer

If a bacterial protein is made from 30 amino acids, how many nucleotides are needed to code for its production?

Correct AnswerverifiedShow Answer

Which of the following attaches to specific amino acids?

Correct AnswerverifiedShow Answer

If the sequence of bases in a section of DNA is TAGGCTAA, what is the corresponding sequence of bases in mRNA?

Correct AnswerverifiedShow Answer

Which of the following has two polynucleotide strands?

Correct AnswerverifiedShow Answer

A gene mutation is defined as change in the:

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
First, initiation involves RNA polymeras...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
RNA is normally single-strande...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified