Question 1

Methylation of histone proteins promotes _____.

Accepted Answer

A) transcription 
B) translation 
C) binding of transcription factors 
D) condensation of DNA 
E) differentiation 
A) transcription 
B) translation 
C) binding of transcription factors 
D) condensation of DNA 
E) differentiation

Question 2

Match between columns
                        Premises: What type of mutation occurred if the sequence GGACTCCTCCTCAGA is changed to GGACTCCTTCCTCAGA?

Accepted Answer

The Answer of Insertion only and Base-pair substitution and Deletion is...

Question 3

Mutations at intron-exon splice sites in DNA can lead to a(n)_____.

Accepted Answer

A) short or truncated protein 
B) protein that has a change in polarity 
C) change in hydrophobicity 
D) unspliced mRNA 
E) mRNA that cannot be translated 
A) short or truncated protein 
B) protein that has a change in polarity 
C) change in hydrophobicity 
D) unspliced mRNA 
E) mRNA that cannot be translated

Question 4

During transcription, adenine is complementary to _____.

Accepted Answer

A) guanine 
B) adenine 
C) cytosine 
D) uracil 
E) guanine and cytosine 
A) guanine 
B) adenine 
C) cytosine 
D) uracil 
E) guanine and cytosine

Question 5

Ricin exerts its effects on a human cell by _____.

Accepted Answer

A) inactivating synthesis of carbohydrates 
B) inhibiting hydrolysis of carbohydrates 
C) preventing protein synthesis 
D) interfering with hydrolysis of lipids 
E) over activating nucleic acid metabolism 
A) inactivating synthesis of carbohydrates 
B) inhibiting hydrolysis of carbohydrates 
C) preventing protein synthesis 
D) interfering with hydrolysis of lipids 
E) over activating nucleic acid metabolism

Question 6

How many different codons in our genetic code specify amino acids?

Accepted Answer

A) 3 
B) 20 
C) 60 
D) 61 
E) 64 
A) 3 
B) 20 
C) 60 
D) 61 
E) 64

Question 7

Translation stops when _____.

Accepted Answer

A) enzymes attach to the mRNA molecule at the end of the transcript 
B) a certain number of codons have been read 
C) one of the three stop codons is encountered 
D) the cell runs out of tRNA 
E) stop codon tRNAs add guanine caps to the newly formed peptide 
A) enzymes attach to the mRNA molecule at the end of the transcript 
B) a certain number of codons have been read 
C) one of the three stop codons is encountered 
D) the cell runs out of tRNA 
E) stop codon tRNAs add guanine caps to the newly formed peptide

Question 8

Match between columns
                        Premises: complex with proteins to form ribosomes

Accepted Answer

The Answer of transcription and rRNA and translation and promoters is...

Question 9

Which enzyme unwinds the DNA during transcription?

Accepted Answer

A) helicase 
B) DNA polymerase 
C) DNA replicase 
D) RNA polymerase 
E) RNA replicase 
A) helicase 
B) DNA polymerase 
C) DNA replicase 
D) RNA polymerase 
E) RNA replicase

Question 10

Which of the following adds RNA nucleotides, one at a time, during transcription?

Accepted Answer

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

Question 11

Frameshift mutations may involve _____.

Accepted Answer

A) the substitution of nucleotides 
B) the substitution of codons 
C) the substitution of amino acids 
D) the insertion of one to several base pairs 
E) mutations in the promoter 
A) the substitution of nucleotides 
B) the substitution of codons 
C) the substitution of amino acids 
D) the insertion of one to several base pairs 
E) mutations in the promoter

Question 12

Match between columns
                        Premises: RNA-directed synthesis of polypeptide chains

Accepted Answer

The Answer of translation and genetic code and promoters and is...

Question 13

The tightly condensed non-functional X chromosome is called a(n)_____.

Accepted Answer

A) Barr body 
B) Y chromosome 
C) autosome 
D) X linked chromosome 
E) Watson segment 
A) Barr body 
B) Y chromosome 
C) autosome 
D) X linked chromosome 
E) Watson segment

Question 14

Match between columns
                        Premises: The mutation in the keratin gene in sphynx cats causes a change in the intron-exon splice site, and is an example of which type of mutation?

Accepted Answer

The Answer of Base-pair substitution and Insertion only and Frame-shift is...

Question 15

Epigenetics is most closely associated with _____.

Accepted Answer

A) base-pair substitution 
B) methylation 
C) Barr bodies 
D) hydrolysis 
E) phosphorylation 
A) base-pair substitution 
B) methylation 
C) Barr bodies 
D) hydrolysis 
E) phosphorylation

Question 16

What is the maximum number of different tRNA's in a eukaryotic cell?

Accepted Answer

A) 3 
B) 20 
C) 60 
D) 61 
E) 64 
A) 3 
B) 20 
C) 60 
D) 61 
E) 64

Question 17

Female secondary sexual traits, such as functional breasts and fat deposits around the hips and thighs, are determined by _____.

Accepted Answer

A) the presence of the master gene, SRY 
B) increased concentration of gene products from the two X chromosomes 
C) absence of gene products from the Y chromosome 
D) sex hormones 
E) maternal influence 
A) the presence of the master gene, SRY 
B) increased concentration of gene products from the two X chromosomes 
C) absence of gene products from the Y chromosome 
D) sex hormones 
E) maternal influence

Question 18

Once the amino acid on the second tRNA bonds with the amino acid of the first tRNA, what happens to that first tRNA?

Accepted Answer

A) it remains attached to the rRNA 
B) it moves into the nucleus to get more instructions from mRNA 
C) it breaks down into its component nucleotides 
D) it leaves the ribosome and may pick up another amino acid 
E) it transforms into an mRNA molecule 
A) it remains attached to the rRNA 
B) it moves into the nucleus to get more instructions from mRNA 
C) it breaks down into its component nucleotides 
D) it leaves the ribosome and may pick up another amino acid 
E) it transforms into an mRNA molecule

Question 19

Mutations in promoter regions of a gene are most likely to _____.

Accepted Answer

A) prevent mRNA from being synthesized 
B) trap mRNA inside the nucleus 
C) prevent mRNA from being recognized by the ribosome 
D) prevent mRNA from being post-transcriptionally modified 
E) alter the amino acid sequence 
A) prevent mRNA from being synthesized 
B) trap mRNA inside the nucleus 
C) prevent mRNA from being recognized by the ribosome 
D) prevent mRNA from being post-transcriptionally modified 
E) alter the amino acid sequence

Question 20

Which of the following processes is/are part of gene expression?
I. transduction
II. transcription
III.translation

Accepted Answer

A) I and II 
B) I and III 
C) II and III 
D) I, II, and III 
E) III only 
A) I and II 
B) I and III 
C) II and III 
D) I, II, and III 
E) III only

Exam 7: Gene Expression and Control

Methylation of histone proteins promotes _____.

Mutations at intron-exon splice sites in DNA can lead to a(n)_____.

During transcription, adenine is complementary to _____.

Ricin exerts its effects on a human cell by _____.

How many different codons in our genetic code specify amino acids?

Translation stops when _____.

Which enzyme unwinds the DNA during transcription?

Which of the following adds RNA nucleotides, one at a time, during transcription?

Frameshift mutations may involve _____.

The tightly condensed non-functional X chromosome is called a(n)_____.

Epigenetics is most closely associated with _____.

What is the maximum number of different tRNA's in a eukaryotic cell?

Female secondary sexual traits, such as functional breasts and fat deposits around the hips and thighs, are determined by _____.

Once the amino acid on the second tRNA bonds with the amino acid of the first tRNA, what happens to that first tRNA?

Mutations in promoter regions of a gene are most likely to _____.

Which of the following processes is/are part of gene expression? I. transduction II. transcription III.translation

Invitation to Biology

Molecules of Life

Cell Structure

Energy and Metabolism

Capturing and Releasing Energy

Dna Structure and Function

How Cells Reproduce

Patterns of Inheritance

Biotechnology

Evidence of Evolution

Processes of Evolution

Early Life Forms and the Viruses

Plants and Fungi

Animal Evolution

Population Ecology

Communities and Ecosystems

The Biosphere and Human Effects

Animal Tissues and Organs

How Animals Move

Circulation and Respiration

Immunity

Digestion and Excretion

Neural Control and the Senses

Endocrine Control

Reproduction and Development

Plant Form and Function

Plant Reproduction and Development

Filters