Question 1

Mutations in an exon region 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 2

The master gene for male sex determination is located on _____.

Accepted Answer

A) both X chromosomes 
B) each autosome 
C) the Y chromosome 
D) the X chromosome 
E) both X and Y chromosomes 
A) both X chromosomes 
B) each autosome 
C) the Y chromosome 
D) the X chromosome 
E) both X and Y chromosomes

Question 3

Eukaryotic post-transcriptional modifications occur in the _____.

Accepted Answer

A) cytoplasm 
B) mitochondria 
C) nucleus 
D) ribosome 
E) endoplasmic reticulum 
A) cytoplasm 
B) mitochondria 
C) nucleus 
D) ribosome 
E) endoplasmic reticulum

Question 4

During elongation,ribosomes catalyze formation of a ____ bond between an amino acid and the growing polypeptide.

Accepted Answer

A) hydrogen 
B) peptide 
C) polar covalent 
D) non-polar covalent 
E) sulfur 
A) hydrogen 
B) peptide 
C) polar covalent 
D) non-polar covalent 
E) sulfur

Question 5

If the codon consisted of only 2 nucleotides,_____ codons would be possible.

Accepted Answer

A) 4 
B) 8 
C) 16 
D) 32 
E) 64 
A) 4 
B) 8 
C) 16 
D) 32 
E) 64

Question 6

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 7

As the polypeptide is elongating during translation,what is the ribosome doing?

Accepted Answer

A) removing incorrectly added amino acids 
B) moving along the mRNA transcript bonding amino acids to each other 
C) travelling back and forth between the nucleus and the growing polypeptide with information on which amino acids to add 
D) removing the non-coding introns 
E) breaking hydrogen bonds between the tRNA and the mRNA 
A) removing incorrectly added amino acids 
B) moving along the mRNA transcript bonding amino acids to each other 
C) travelling back and forth between the nucleus and the growing polypeptide with information on which amino acids to add 
D) removing the non-coding introns 
E) breaking hydrogen bonds between the tRNA and the mRNA

Question 8

Which nucleotide is added to the end of a completed messenger RNA transcript?

Accepted Answer

A) adenine 
B) thymine 
C) cytosine 
D) guanine 
E) alternating adenine and thymine 
A) adenine 
B) thymine 
C) cytosine 
D) guanine 
E) alternating adenine and thymine

Question 9

In the figure above,the process indicated by number 1 is _____,while the process indicated by number 2 is _____.

Accepted Answer

A) translation; transcription 
B) translation; transformation 
C) transcription; translation 
D) transcription; transformation 
E) transformation; translation 
A) translation; transcription 
B) translation; transformation 
C) transcription; translation 
D) transcription; transformation 
E) transformation; translation

Question 10

In a sickled red blood cell,what do the hemoglobin molecules do?

Accepted Answer

A) repel each other 
B) stick together 
C) fracture and release their contents into the cytoplasm 
D) create holes in the cell membrane 
E) hold less tightly onto oxygen molecules 
A) repel each other 
B) stick together 
C) fracture and release their contents into the cytoplasm 
D) create holes in the cell membrane 
E) hold less tightly onto oxygen molecules

Question 11

Which of the following carries amino acids to ribosomes?

Accepted Answer

A) mRNA 
B) tRNA 
C) hnRNA 
D) rRNA 
E) all of these 
A) mRNA 
B) tRNA 
C) hnRNA 
D) rRNA 
E) all of these

Question 12

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 13

Most homeotic genes encode _____; therefore,the protein products of these master genes are found in the _____.

Accepted Answer

A) stop codons; ribosomes 
B) transcription factors; nucleus 
C) transcription factors; extracellular matrix 
D) splicing proteins; endoplasmic reticulum 
E) energy releasing proteins; mitochondria 
A) stop codons; ribosomes 
B) transcription factors; nucleus 
C) transcription factors; extracellular matrix 
D) splicing proteins; endoplasmic reticulum 
E) energy releasing proteins; mitochondria

Question 14

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 15

In most species,all mRNA transcripts begin with _____.

Accepted Answer

A) methionine 
B) a ribosome 
C) AUG 
D) the P site 
E) an anticodon 
A) methionine 
B) a ribosome 
C) AUG 
D) the P site 
E) an anticodon

Question 16

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 17

What is an anticodon?

Accepted Answer

A) the region of DNA that codes for the codon 
B) the region of DNA that base pairs with the codon 
C) the region of the mRNA that codes for an amino acid 
D) the region of the mRNA that base pairs with the tRNA 
E) the region of the tRNA that base pairs with the mRNA 
A) the region of DNA that codes for the codon 
B) the region of DNA that base pairs with the codon 
C) the region of the mRNA that codes for an amino acid 
D) the region of the mRNA that base pairs with the tRNA 
E) the region of the tRNA that base pairs with the mRNA

Question 18

What is at the center of a heme molecule in a hemoglobin protein?

Accepted Answer

A) a beta globin chain 
B) an alpha globin chain 
C) iron 
D) nitrogen 
E) another heme molecule 
A) a beta globin chain 
B) an alpha globin chain 
C) iron 
D) nitrogen 
E) another heme molecule

Question 19

A Barr body exists for the purpose of _____.

Accepted Answer

A) gene dosage compensation 
B) insuring fertilization 
C) blocking the activity of the Y chromosome 
D) turning on the SRY gene 
E) activating master genes 
A) gene dosage compensation 
B) insuring fertilization 
C) blocking the activity of the Y chromosome 
D) turning on the SRY gene 
E) activating master genes

Question 20

Identify the type of mutation associated with the following questions and statements.Some answers may be used more than once.
-Which type of mutation replaces glutamic acid with valine in beta globin proteins in individuals with sickle-cell anemia?

Accepted Answer

A) Deletion only 
B) Insertion only 
C) Base-pair substitution 
D) Frame-shift mutation 
A) Deletion only 
B) Insertion only 
C) Base-pair substitution 
D) Frame-shift mutation

Mutations in an exon region of a gene are most likely to _____.

The master gene for male sex determination is located on _____.

Eukaryotic post-transcriptional modifications occur in the _____.

During elongation,ribosomes catalyze formation of a ____ bond between an amino acid and the growing polypeptide.

If the codon consisted of only 2 nucleotides,_____ codons would be possible.

Frameshift mutations may involve _____.

As the polypeptide is elongating during translation,what is the ribosome doing?

Which nucleotide is added to the end of a completed messenger RNA transcript?

In the figure above,the process indicated by number 1 is _,while the process indicated by number 2 is _.

In a sickled red blood cell,what do the hemoglobin molecules do?

Which of the following carries amino acids to ribosomes?

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

Most homeotic genes encode _; therefore,the protein products of these master genes are found in the _.

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

In most species,all mRNA transcripts begin with _____.

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

What is an anticodon?

What is at the center of a heme molecule in a hemoglobin protein?

A Barr body exists for the purpose of _____.

Identify the type of mutation associated with the following questions and statements.Some answers may be used more than once. -Which type of mutation replaces glutamic acid with valine in beta globin proteins in individuals with sickle-cell anemia?

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

Filters

Exam 7: Gene Expression AND Control

Mutations in an exon region of a gene are most likely to _____.

The master gene for male sex determination is located on _____.

Eukaryotic post-transcriptional modifications occur in the _____.

During elongation,ribosomes catalyze formation of a ____ bond between an amino acid and the growing polypeptide.

If the codon consisted of only 2 nucleotides,_____ codons would be possible.

Frameshift mutations may involve _____.

As the polypeptide is elongating during translation,what is the ribosome doing?

Which nucleotide is added to the end of a completed messenger RNA transcript?

In the figure above,the process indicated by number 1 is _____,while the process indicated by number 2 is _____.

In a sickled red blood cell,what do the hemoglobin molecules do?

Which of the following carries amino acids to ribosomes?

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

Most homeotic genes encode _____; therefore,the protein products of these master genes are found in the _____.

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

In most species,all mRNA transcripts begin with _____.

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

What is an anticodon?

What is at the center of a heme molecule in a hemoglobin protein?

A Barr body exists for the purpose of _____.

Identify the type of mutation associated with the following questions and statements.Some answers may be used more than once. -Which type of mutation replaces glutamic acid with valine in beta globin proteins in individuals with sickle-cell anemia?

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

Filters

In the figure above,the process indicated by number 1 is _,while the process indicated by number 2 is _.

Most homeotic genes encode _; therefore,the protein products of these master genes are found in the _.