Question 1

Although Dolly the cloned sheep and her nucleus donor are clones,they do not contain the same ________ DNA.

Accepted Answer

The answer of Although Dolly the cloned sheep and her...

Question 2

Genes associated with embryonic development are known as

Accepted Answer

A) homologous genes. 
B) sigma factors. 
C) heterologous genes. 
D) hopanoids. 
E) homeotic genes. 
A) homologous genes. 
B) sigma factors. 
C) heterologous genes. 
D) hopanoids. 
E) homeotic genes.

Question 3

One mechanism that may lead to novel disease treatment involves ________,which hinders the translation of specific mRNAs.

Accepted Answer

A) siRNA 
B) iRNA 
C) P bodies 
D) macro-RNAs 
E) rRNA 
A) siRNA 
B) iRNA 
C) P bodies 
D) macro-RNAs 
E) rRNA

Question 4

Small molecules that bind directly to mRNAs and effect transcription or translation are binding to regions of the mRNA known as

Accepted Answer

A) Shine-Delgarno sequences. 
B) the operator region. 
C) riboswitches. 
D) ribozymes. 
E) allosteric sites. 
A) Shine-Delgarno sequences. 
B) the operator region. 
C) riboswitches. 
D) ribozymes. 
E) allosteric sites.

Question 5

An E.coli cell with the genotype lac         would make which of the following protein products and in what manner?

Accepted Answer

A) LacZ, induced 
B) LacZ and Lac A, induced 
C) LacY, constituitive 
D) LacZ, constituitive 
E) LacZ and LacA, constituitive 
A) LacZ, induced 
B) LacZ and Lac A, induced 
C) LacY, constituitive 
D) LacZ, constituitive 
E) LacZ and LacA, constituitive

Question 6

Match between columns
                        Premises: enhanceosome
silencer
positive gene control
polygenic mRNA
proximal control elements
homeotic genes
activators
constitutive gene
negative gene control
enhancer

Accepted Answer

The Answer of transcribed and translated at certain times in is...

Question 7

The situation in which an active regulatory protein "turns off" gene expression is an example of

Accepted Answer

A) a mutation. 
B) positive control. 
C) negative control. 
D) constitutive gene elements. 
E) unique regulation. 
A) a mutation. 
B) positive control. 
C) negative control. 
D) constitutive gene elements. 
E) unique regulation.

Question 8

What is therapeutic cloning,and what are some of the ethical considerations for its use?

Accepted Answer

Therapeutic cloning is the use of embryo

Question 9

The genetic disorder(s)associated with DNA methylation include

Accepted Answer

A) Prader-Willi syndrome. 
B) Angelman syndrome. 
C) some cancers. 
D) Huntington's disease. 
E) all of the above 
A) Prader-Willi syndrome. 
B) Angelman syndrome. 
C) some cancers. 
D) Huntington's disease. 
E) all of the above

Question 10

________ is the term given to the process by which cells delete genes when the gene products are no longer required,as occurs in mammalian red blood cells.

Accepted Answer

Gene delet

Question 11

The observed "puffs" in the polytene chromosomes of Drosophila are sites of

Accepted Answer

A) attenuation. 
B) condensation. 
C) induction. 
D) transcription. 
E) translation. 
A) attenuation. 
B) condensation. 
C) induction. 
D) transcription. 
E) translation.

Question 12

You are studying a biochemical pathway.Preliminary results suggest that this pathway is subject to end-product repression.This pathway is therefore most likely to be a(n)________ pathway.

Accepted Answer

A) anabolic 
B) catabolic 
C) constitutive 
D) induced 
E) unregulated 
A) anabolic 
B) catabolic 
C) constitutive 
D) induced 
E) unregulated

Question 13

In the lactose operon,a P mutant would have a mutation in the ________ region of the operon.

Accepted Answer

The answer of In the lactose operon,a P mutant would...

Question 14

A certain gene is transformed into a plant cell for potential use as a vaccine delivery system.Upon performing a Northern blot,a good deal of mRNA for the gene is produced.However,the protein product for the gene is not observed.One explanation may be that the

Accepted Answer

A) plant cell recognizes and degrades the protein in the cytoplasm. 
B) plant ribosomes are not recognizing the mRNA translational initiation sites. 
C) mRNA is not stable in the plant cytoplasm. 
D) all of the above 
E) none of the above 
A) plant cell recognizes and degrades the protein in the cytoplasm. 
B) plant ribosomes are not recognizing the mRNA translational initiation sites. 
C) mRNA is not stable in the plant cytoplasm. 
D) all of the above 
E) none of the above

Question 15

Which of the following molecules coordinates the expression of nonadjacent genes?

Accepted Answer

A) leucine zippers 
B) response elements 
C) transcription factors 
D) coactivators 
E) control elements 
A) leucine zippers 
B) response elements 
C) transcription factors 
D) coactivators 
E) control elements

Question 16

The main chromosome of a bacterial cell possesses the following genotype with regard to the lac operon: I⁻O⁺Z⁺Y⁻A⁻.This bacterial cell would

Accepted Answer

A) make LacZ in the presence of lactose. 
B) make LacZ independently of lactose. 
C) make LacZ and LacY in the presence of lactose. 
D) make LacA in the presence of lactose. 
E) make no Lac proteins. 
A) make LacZ in the presence of lactose. 
B) make LacZ independently of lactose. 
C) make LacZ and LacY in the presence of lactose. 
D) make LacA in the presence of lactose. 
E) make no Lac proteins.

Question 17

The situation in which an active regulatory protein "turns on" gene expression is an example of

Accepted Answer

A) feedback inhibition. 
B) positive control. 
C) negative control. 
D) constitutive gene elements. 
E) a mutation. 
A) feedback inhibition. 
B) positive control. 
C) negative control. 
D) constitutive gene elements. 
E) a mutation.

Question 18

The trp operon in E.coli is regulated in such a manner as to allow expression of the genes only when cellular levels of tryptophan are low.When tryptophan levels are adequate,the secondary structure of the mRNA halts translation.This form of regulation is known as

Accepted Answer

A) attenuation. 
B) transcriptional regulation. 
C) positive regulatory control. 
D) negative regulatory control. 
E) repression. 
A) attenuation. 
B) transcriptional regulation. 
C) positive regulatory control. 
D) negative regulatory control. 
E) repression.

Question 19

A person with the genotype XXXY would be expected to have how many Barr bodies?

Accepted Answer

A) 0 
B) 1 
C) 2 
D) 3 
E) 4 
A) 0 
B) 1 
C) 2 
D) 3 
E) 4

Question 20

A male is tested for cellular abnormalities.The technician notes that there are two Barr bodies present within each of his cells.As a result he has the genotype

Accepted Answer

A) XY. 
B) XO. 
C) XXX. 
D) XXY. 
E) XXXY. 
A) XY. 
B) XO. 
C) XXX. 
D) XXY. 
E) XXXY.

Exam 23: The Regulation of Gene Expression

Although Dolly the cloned sheep and her nucleus donor are clones,they do not contain the same ________ DNA.

Genes associated with embryonic development are known as

One mechanism that may lead to novel disease treatment involves ________,which hinders the translation of specific mRNAs.

Small molecules that bind directly to mRNAs and effect transcription or translation are binding to regions of the mRNA known as

An E.coli cell with the genotype lac would make which of the following protein products and in what manner?

The situation in which an active regulatory protein "turns off" gene expression is an example of

What is therapeutic cloning,and what are some of the ethical considerations for its use?

The genetic disorder(s)associated with DNA methylation include

________ is the term given to the process by which cells delete genes when the gene products are no longer required,as occurs in mammalian red blood cells.

The observed "puffs" in the polytene chromosomes of Drosophila are sites of

You are studying a biochemical pathway.Preliminary results suggest that this pathway is subject to end-product repression.This pathway is therefore most likely to be a(n)________ pathway.

In the lactose operon,a P mutant would have a mutation in the ________ region of the operon.

A certain gene is transformed into a plant cell for potential use as a vaccine delivery system.Upon performing a Northern blot,a good deal of mRNA for the gene is produced.However,the protein product for the gene is not observed.One explanation may be that the

Which of the following molecules coordinates the expression of nonadjacent genes?

The main chromosome of a bacterial cell possesses the following genotype with regard to the lac operon: I⁻O⁺Z⁺Y⁻A⁻.This bacterial cell would

The situation in which an active regulatory protein "turns on" gene expression is an example of

The trp operon in E.coli is regulated in such a manner as to allow expression of the genes only when cellular levels of tryptophan are low.When tryptophan levels are adequate,the secondary structure of the mRNA halts translation.This form of regulation is known as

A person with the genotype XXXY would be expected to have how many Barr bodies?

A male is tested for cellular abnormalities.The technician notes that there are two Barr bodies present within each of his cells.As a result he has the genotype

A Preview of the Cell

The Chemistry of the Cell

The Macromolecules of the Cell

Cells and Organelles

Bioenergetics: the Flow of Energy in the Cell

Enzymes: the Catalysts of Life

Membranes: Their Structure, function, and Chemistry

Transport Across Membranes: Overcoming the Permeability Barrier

Chemotrophic Energy Metabolism: Glycolysis and Fermentation

Chemotrophic Energy Metabolism: Aerobic Respiration

Phototrophic Energy Metabolism: Photosynthesis

The Endomembrane System and Peroxisomes

Signal Transduction Mechanisms: Ielectrical and Synaptic Signaling in Neurons

Signal Transduction Mechanisms: Iimessengers and Receptors

Cytoskeletal Systems

Cellular Movement: Motility and Contractility

Beyond the Cell: Cell Adhesions, cell Junctions, and Extracellular Structures

The Structural Basis of Cellular Information: DNA, chromosomes, and the Nucleus

The Cell Cycle, DNA Replication, and Mitosis

Sexual Reproduction, meiosis, and Genetic Recombination

Gene Expression: Ithe Genetic Code and Transcription

Gene Expression: Iiprotein Synthesis and Sorting

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