Question 1

Which of the following is a DNA nucleotide?

Accepted Answer

A) a phosphate group,adenine and ribose 
B) a phosphate group,guanine and deoxyribose 
C) cytosine and ribose 
D) thymine and deoxyribose 
E) a phosphate group and adenine 
A) a phosphate group,adenine and ribose 
B) a phosphate group,guanine and deoxyribose 
C) cytosine and ribose 
D) thymine and deoxyribose 
E) a phosphate group and adenine

Question 2

Which of the following statements was initially a disadvantage of using the fruit fly for genetic studies?

Accepted Answer

A) They have a short generation time from egg to maturity. 
B) They produce up to 1000 eggs in a lifetime. 
C) They are easy to house and breed. 
D) There was only one strain of flies available. 
E) They are inexpensive to maintain. 
A) They have a short generation time from egg to maturity. 
B) They produce up to 1000 eggs in a lifetime. 
C) They are easy to house and breed. 
D) There was only one strain of flies available. 
E) They are inexpensive to maintain.

Question 3

In which of the following organisms is polyploidization particularly common?

Accepted Answer

A) flowering plants 
B) wheat 
C) bananas 
D) coffee 
E) All of these are correct. 
A) flowering plants 
B) wheat 
C) bananas 
D) coffee 
E) All of these are correct.

Question 4

____________ are sites in the genome that vary among different individuals.This term usually refers to a genetic variant that occurs in at least 1% of a species population.

Accepted Answer

A) Genetic variances 
B) Genetic anomalies 
C) Genetic polymorphisms 
D) Genetic polyploidisms 
E) Genetic polydactyly 
A) Genetic variances 
B) Genetic anomalies 
C) Genetic polymorphisms 
D) Genetic polyploidisms 
E) Genetic polydactyly

Question 5

Why would changes in the genes for transcription factors be expected to generate major phenotypic differences?

Accepted Answer

A) They are extremely powerful genes. 
B) They can affect the expression of large numbers of other genes. 
C) They can affect the expression of small numbers of other genes. 
D) Their gene products normally denature more rapidly than other gene products. 
E) Their gene products are remarkably stable. 
A) They are extremely powerful genes. 
B) They can affect the expression of large numbers of other genes. 
C) They can affect the expression of small numbers of other genes. 
D) Their gene products normally denature more rapidly than other gene products. 
E) Their gene products are remarkably stable.

Question 6

What function does topoisomerase II serve during mitosis?

Accepted Answer

A) It pulls the chromosomes apart in association with the spindle. 
B) It organizes the spindle. 
C) It is needed to disentangle DNA molecules before duplicated chromosomes can be separated during mitosis. 
D) It moves genes from place to place. 
E) It lengthens chromosomes at the end of mitosis. 
A) It pulls the chromosomes apart in association with the spindle. 
B) It organizes the spindle. 
C) It is needed to disentangle DNA molecules before duplicated chromosomes can be separated during mitosis. 
D) It moves genes from place to place. 
E) It lengthens chromosomes at the end of mitosis.

Question 7

Which type of enzyme makes a transient break in both DNA duplex strands and then transports another segment of a DNA molecule (or separate molecule entirely)through the break and reseals the severed strands?

Accepted Answer

A) Type I topoisomerase 
B) Type II topoisomerase 
C) Type I topologicase 
D) Type II topologicase 
E) Type I isomerase 
A) Type I topoisomerase 
B) Type II topoisomerase 
C) Type I topologicase 
D) Type II topologicase 
E) Type I isomerase

Question 8

The behavior of what cell constituent correlated perfectly with that of Mendel's genetic factors?

Accepted Answer

A) the mitochondria 
B) the endoplasmic reticulum 
C) the homologous pairs of chromosomes 
D) the homologous pairs of centrioles 
E) the nucleolus 
A) the mitochondria 
B) the endoplasmic reticulum 
C) the homologous pairs of chromosomes 
D) the homologous pairs of centrioles 
E) the nucleolus

Question 9

The backbone of a DNA molecule is _________.

Accepted Answer

A) made up of sugars alone 
B) made up of nitrogenous bases alone 
C) made up of phosphate groups alone 
D) made up of alternating phosphate and sugar groups 
E) made up of alternating sugars and nitrogenous bases 
A) made up of sugars alone 
B) made up of nitrogenous bases alone 
C) made up of phosphate groups alone 
D) made up of alternating phosphate and sugar groups 
E) made up of alternating sugars and nitrogenous bases

Question 10

Why are satellite DNAs called satellite DNAs?

Accepted Answer

A) They orbit the Earth. 
B) They form bands in a density gradient within the main band formed by the bulk of the genome. 
C) They form bands in a density gradient separate from the main band formed by the bulk of the genome. 
D) They form bands on an agarose gel separate from the main band formed by the bulk of the genome. 
E) They form small bands on an agarose gel within the main band formed by the bulk of the genome. 
A) They orbit the Earth. 
B) They form bands in a density gradient within the main band formed by the bulk of the genome. 
C) They form bands in a density gradient separate from the main band formed by the bulk of the genome. 
D) They form bands on an agarose gel separate from the main band formed by the bulk of the genome. 
E) They form small bands on an agarose gel within the main band formed by the bulk of the genome.

Question 11

What statement below explains the uniform width of the DNA molecule along its entire width?

Accepted Answer

A) A purine nitrogenous base always pairs with another purine nitrogenous base. 
B) A pyrimidine nitrogenous base always pairs with another pyrimidine nitrogenous base. 
C) A pyrimidine nitrogenous base always pairs with a purine nitrogenous base. 
D) Repulsion between phosphate groups keeps the strands a uniform distance apart. 
E) Attraction between phosphate groups keeps the strands a uniform distance apart. 
A) A purine nitrogenous base always pairs with another purine nitrogenous base. 
B) A pyrimidine nitrogenous base always pairs with another pyrimidine nitrogenous base. 
C) A pyrimidine nitrogenous base always pairs with a purine nitrogenous base. 
D) Repulsion between phosphate groups keeps the strands a uniform distance apart. 
E) Attraction between phosphate groups keeps the strands a uniform distance apart.

Question 12

The building blocks of a nucleotide are ___________.

Accepted Answer

A) a pentose sugar and a phosphate group 
B) a pentose sugar and a nitrogenous base 
C) a phosphate group and a nitrogenous base 
D) a pentose sugar,a phosphate group and a nitrogenous base 
E) a pentose sugar,a phosphate group and an amino acid 
A) a pentose sugar and a phosphate group 
B) a pentose sugar and a nitrogenous base 
C) a phosphate group and a nitrogenous base 
D) a pentose sugar,a phosphate group and a nitrogenous base 
E) a pentose sugar,a phosphate group and an amino acid

Question 13

The original model of DNA structure stated that each unit of structure in DNA contained all four nitrogenous bases;it was called the ________.

Accepted Answer

A) Endosymbiotic Theory 
B) Induced Fit Model 
C) Lock and Key Model 
D) Tetranucleotide Theory 
E) Evolutionary Theory 
A) Endosymbiotic Theory 
B) Induced Fit Model 
C) Lock and Key Model 
D) Tetranucleotide Theory 
E) Evolutionary Theory

Question 14

When a gene has been duplicated one or more times,what are the possible things that can happen to the duplicated gene?

Accepted Answer

A) The duplicated gene can accumulate favorable mutations and acquire a new function. 
B) The duplicated gene can be lost during evolution through deletion. 
C) The duplicated gene can be rendered nonfunctional by unfavorable mutations. 
D) If there are two copies of the gene,both could undergo mutation so that each evolves a more specialized function than the original gene. 
E) All of these are correct. 
A) The duplicated gene can accumulate favorable mutations and acquire a new function. 
B) The duplicated gene can be lost during evolution through deletion. 
C) The duplicated gene can be rendered nonfunctional by unfavorable mutations. 
D) If there are two copies of the gene,both could undergo mutation so that each evolves a more specialized function than the original gene. 
E) All of these are correct.

Question 15

Susumu Ohno proposed that the evolution of vertebrates from a much simpler invertebrate ancestor was made possible by two separate rounds of whole-genome duplication during an early evolutionary period.How was it proposed that the whole-gene duplication led to the encoding of the more complex vertebrate body?

Accepted Answer

A) The extra genes immediately resulted in a bigger body. 
B) The many extra genes generated by genetic duplication can be molded over time into new genes needed to encode the complex vertebrate body. 
C) The genes could rapidly combine to make new structures. 
D) The gene duplication makes the nucleus bigger and makes the cell more versatile. 
E) The duplication of the chromosomes leads to new cytoplasmic structures in the first generation. 
A) The extra genes immediately resulted in a bigger body. 
B) The many extra genes generated by genetic duplication can be molded over time into new genes needed to encode the complex vertebrate body. 
C) The genes could rapidly combine to make new structures. 
D) The gene duplication makes the nucleus bigger and makes the cell more versatile. 
E) The duplication of the chromosomes leads to new cytoplasmic structures in the first generation.

Question 16

You isolate chromosomes from the salivary gland of an organism and prepare a glass slide of the chromosome preparation.When you look at the chromosomes on the slide,they can be seen to be extremely large and they exhibit a distinct banding pattern.What is a possible explanation for this?

Accepted Answer

The chromosomes are probably p

Question 17

Current estimates place the number of protein-coding human genes in the neighborhood of _______.

Accepted Answer

A) 100,000 
B) 30,000 
C) 20,000 
D) 75,000 
E) 5,000 
A) 100,000 
B) 30,000 
C) 20,000 
D) 75,000 
E) 5,000

Question 18

What is the major abnormality seen in the daughter cells of an egg that has been fertilized by more than one sperm?

Accepted Answer

A) The daughter cells have more cilia. 
B) The daughter cells are smaller. 
C) The daughter cells have variable numbers of chromosomes. 
D) The daughter cells enter meiosis unexpectedly. 
E) The daughter cells swell to three times their normal size. 
A) The daughter cells have more cilia. 
B) The daughter cells are smaller. 
C) The daughter cells have variable numbers of chromosomes. 
D) The daughter cells enter meiosis unexpectedly. 
E) The daughter cells swell to three times their normal size.

Question 19

How many chromosomes would a sexually-reproducing organism with 6 chromosomes in generation 0 have in generation 4 if there are reduction divisions in meiosis?

Accepted Answer

A) 6 
B) 12 
C) 24 
D) 48 
E) 96 
A) 6 
B) 12 
C) 24 
D) 48 
E) 96

Question 20

The variety and number of DNA sequence copies in the genome are known as genome _______.

Accepted Answer

A) complexion 
B) complicatedness 
C) complexity 
D) variability 
E) reannealation 
A) complexion 
B) complicatedness 
C) complexity 
D) variability 
E) reannealation

Which of the following is a DNA nucleotide?

Which of the following statements was initially a disadvantage of using the fruit fly for genetic studies?

In which of the following organisms is polyploidization particularly common?

____________ are sites in the genome that vary among different individuals.This term usually refers to a genetic variant that occurs in at least 1% of a species population.

Why would changes in the genes for transcription factors be expected to generate major phenotypic differences?

What function does topoisomerase II serve during mitosis?

Which type of enzyme makes a transient break in both DNA duplex strands and then transports another segment of a DNA molecule (or separate molecule entirely)through the break and reseals the severed strands?

The behavior of what cell constituent correlated perfectly with that of Mendel's genetic factors?

The backbone of a DNA molecule is _________.

Why are satellite DNAs called satellite DNAs?

What statement below explains the uniform width of the DNA molecule along its entire width?

The building blocks of a nucleotide are ___________.

The original model of DNA structure stated that each unit of structure in DNA contained all four nitrogenous bases;it was called the ________.

When a gene has been duplicated one or more times,what are the possible things that can happen to the duplicated gene?

You isolate chromosomes from the salivary gland of an organism and prepare a glass slide of the chromosome preparation.When you look at the chromosomes on the slide,they can be seen to be extremely large and they exhibit a distinct banding pattern.What is a possible explanation for this?

Current estimates place the number of protein-coding human genes in the neighborhood of _______.

What is the major abnormality seen in the daughter cells of an egg that has been fertilized by more than one sperm?

How many chromosomes would a sexually-reproducing organism with 6 chromosomes in generation 0 have in generation 4 if there are reduction divisions in meiosis?

The variety and number of DNA sequence copies in the genome are known as genome _______.

Introduction to the Study of Cell and Molecular Biology

The Chemical Basis of Life

Bioenergetics, Enzymes, and Metabolism

The Structure and Function of the Plasma Membrane

Aerobic Respiration and the Mitochondrion

Photosynthesis and the Chloroplast

Interactions Between Cells and Their Environment

Cytoplasmic Membrane Systems: Structure, Function, and Membrane Trafficking

The Cytoskeleton and Cell Motility

Gene Expression: From Transcription to Translation

Control of Gene Expression

Dna Replication and Repair

Cellular Reproduction

Cell Signaling and Signal Transduction: Communication Between Cells

Cancer

The Immune Response

Techniques in Cell and Molecular Biology

Filters

Exam 10: The Nature of the Gene and the Genome

Which of the following is a DNA nucleotide?

Which of the following statements was initially a disadvantage of using the fruit fly for genetic studies?

In which of the following organisms is polyploidization particularly common?

____________ are sites in the genome that vary among different individuals.This term usually refers to a genetic variant that occurs in at least 1% of a species population.

Why would changes in the genes for transcription factors be expected to generate major phenotypic differences?

What function does topoisomerase II serve during mitosis?

Which type of enzyme makes a transient break in both DNA duplex strands and then transports another segment of a DNA molecule (or separate molecule entirely)through the break and reseals the severed strands?

The behavior of what cell constituent correlated perfectly with that of Mendel's genetic factors?

The backbone of a DNA molecule is _________.

Why are satellite DNAs called satellite DNAs?

What statement below explains the uniform width of the DNA molecule along its entire width?

The building blocks of a nucleotide are ___________.

The original model of DNA structure stated that each unit of structure in DNA contained all four nitrogenous bases;it was called the ________.

When a gene has been duplicated one or more times,what are the possible things that can happen to the duplicated gene?

You isolate chromosomes from the salivary gland of an organism and prepare a glass slide of the chromosome preparation.When you look at the chromosomes on the slide,they can be seen to be extremely large and they exhibit a distinct banding pattern.What is a possible explanation for this?

Current estimates place the number of protein-coding human genes in the neighborhood of _______.

What is the major abnormality seen in the daughter cells of an egg that has been fertilized by more than one sperm?

How many chromosomes would a sexually-reproducing organism with 6 chromosomes in generation 0 have in generation 4 if there are reduction divisions in meiosis?

The variety and number of DNA sequence copies in the genome are known as genome _______.

Introduction to the Study of Cell and Molecular Biology

The Chemical Basis of Life

Bioenergetics, Enzymes, and Metabolism

The Structure and Function of the Plasma Membrane

Aerobic Respiration and the Mitochondrion

Photosynthesis and the Chloroplast

Interactions Between Cells and Their Environment

Cytoplasmic Membrane Systems: Structure, Function, and Membrane Trafficking

The Cytoskeleton and Cell Motility

Gene Expression: From Transcription to Translation

Control of Gene Expression

Dna Replication and Repair

Cellular Reproduction

Cell Signaling and Signal Transduction: Communication Between Cells

Cancer

The Immune Response

Techniques in Cell and Molecular Biology

Filters