Question 1

In thbonding of nitrogenous bases,

Accepted Answer

A) adenine is paired with cytosine. 
B) adenine is paired with guanine. 
C) cytosine is paired with thymine. 
D) guanine is paired with guanine. 
E) none of these are correct. 
A) adenine is paired with cytosine. 
B) adenine is paired with guanine. 
C) cytosine is paired with thymine. 
D) guanine is paired with guanine. 
E) none of these are correct. D

Question 2

In thbonding of two nucleotides,

Accepted Answer

A) hydrogen bonds are used. 
B) adenine and thymine bind together. 
C) guanine and cytosine bind together. 
D) double-ring nitrogenous bases connect to single-ring bases. 
E) all of these occur. 
A) hydrogen bonds are used. 
B) adenine and thymine bind together. 
C) guanine and cytosine bind together. 
D) double-ring nitrogenous bases connect to single-ring bases. 
E) all of these occur. A

Question 3

RosalinFranklin's research contribution was essential in

Accepted Answer

A) establishing the single-stranded nature of DNA. 
B) establishing the principle of base pairing. 
C) establishing most of the principal structural features of DNA. 
D) sequencing DNA molecules. 
E) determining the bonding energy of DNA molecules. 
A) establishing the single-stranded nature of DNA. 
B) establishing the principle of base pairing. 
C) establishing most of the principal structural features of DNA. 
D) sequencing DNA molecules. 
E) determining the bonding energy of DNA molecules. C

Question 4

Which chromosomes arcarrieby a normal malbird?

Accepted Answer

A) ZO 
B) ZW 
C) WW 
D) WO 
E) ZWW 
A) ZO 
B) ZW 
C) WW 
D) WO 
E) ZWW

Question 5

In DNA molecules,

Accepted Answer

A) the nucleotides are arranged in a linear, unbranched pattern. 
B) the nitrogenous bases are found on the outside of the molecule. 
C) the sugar-phosphate pattern runs the same way on each DNA strand. 
D) all of these are true. 
E) none of these are true. 
A) the nucleotides are arranged in a linear, unbranched pattern. 
B) the nitrogenous bases are found on the outside of the molecule. 
C) the sugar-phosphate pattern runs the same way on each DNA strand. 
D) all of these are true. 
E) none of these are true.

Question 6

Which of thfollowing arreasons set by biologists to keep improving research on animal cloning?

Accepted Answer

A) production of organs for people with incurable diseases 
B) productions of replacement tissues 
C) possibility of saving endangered animals 
D) all of these reasons 
E) none of these reasons 
A) production of organs for people with incurable diseases 
B) productions of replacement tissues 
C) possibility of saving endangered animals 
D) all of these reasons 
E) none of these reasons

Question 7

Which of thfollowing statements is (are) truabout thfirst cloneanimal?

Accepted Answer

A) The first cloned animal was a sheep. 
B) At five years old, it was as arthritic as a twenty-year-old sheep. 
C) At six years old it contracted a lung disease that affects only old sheep. 
D) Its telomeres shortened faster than usual. 
E) All of these are true. 
A) The first cloned animal was a sheep. 
B) At five years old, it was as arthritic as a twenty-year-old sheep. 
C) At six years old it contracted a lung disease that affects only old sheep. 
D) Its telomeres shortened faster than usual. 
E) All of these are true.

Question 8

Which of thfollowing statements is INCORRECT about eukaryotic chromosomes?

Accepted Answer

A) The number of chromosomes varies from one species to another. 
B) In any human body cell, all chromosomes have the same shape and length. 
C) A chromosome consists of DNA associated with histone proteins. 
D) Human body cells have two copies of each type of chromosome. 
E) After the process of duplication, each chromosome consists of two sister chromatids. 
A) The number of chromosomes varies from one species to another. 
B) In any human body cell, all chromosomes have the same shape and length. 
C) A chromosome consists of DNA associated with histone proteins. 
D) Human body cells have two copies of each type of chromosome. 
E) After the process of duplication, each chromosome consists of two sister chromatids.

Question 9

In step "b," thtwo strands havseparatebecause

Accepted Answer

A) the polar covalent bonds between bases were broken. 
B) the nonpolar covalent bonds between bases were broken. 
C) the ionic bonds between bases were broken. 
D) the hydrogen bonds between bases were broken. 
E) the peptide bonds between bases were broken. 
A) the polar covalent bonds between bases were broken. 
B) the nonpolar covalent bonds between bases were broken. 
C) the ionic bonds between bases were broken. 
D) the hydrogen bonds between bases were broken. 
E) the peptide bonds between bases were broken.

Question 10

What is thnumber of chromosomes founin an oak tree?

Accepted Answer

A) 2 
B) 4 
C) 8 
D) 12 
E) 24 
A) 2 
B) 4 
C) 8 
D) 12 
E) 24

Question 11

Which of thfollowing malorganisms do NOT contain XY chromosomes?

Accepted Answer

A) dogs 
B) fruit flies 
C) gorillas 
D) rats 
E) butterflies 
A) dogs 
B) fruit flies 
C) gorillas 
D) rats 
E) butterflies

Question 12

Which of thfollowing femalorganisms do NOT contain XX chromosomes?

Accepted Answer

A) humans 
B) fruit flies 
C) gorillas 
D) birds 
E) rats 
A) humans 
B) fruit flies 
C) gorillas 
D) birds 
E) rats

Question 13

ThDNA moleculcoulbcompareto a

Accepted Answer

A) hair pin. 
B) ladder. 
C) key. 
D) globular mass. 
E) flat plate. 
A) hair pin. 
B) ladder. 
C) key. 
D) globular mass. 
E) flat plate.

Question 14

Which of thfollowing malorganisms contain two identical sex chromosomes?

Accepted Answer

A) snakes 
B) butterflies 
C) fruit flies 
D) frogs 
E) alligators 
A) snakes 
B) butterflies 
C) fruit flies 
D) frogs 
E) alligators

Question 15

After replication, each chromosomharbors

Accepted Answer

A) two sister chromatids. 
B) two sister chromatins. 
C) two sister chromosomes. 
D) two sister DNA. 
E) two sister RNA. 
A) two sister chromatids. 
B) two sister chromatins. 
C) two sister chromosomes. 
D) two sister DNA. 
E) two sister RNA.

Question 16

DNA replication

Accepted Answer

A) produces RNA molecules. 
B) produces only new DNA. 
C) produces two molecules, each of which is half-new and half-old DNA joined lengthwise to each other. 
D) generates excessive DNA, which eventually causes the nucleus to divide. 
E) is too complex to characterize. 
A) produces RNA molecules. 
B) produces only new DNA. 
C) produces two molecules, each of which is half-new and half-old DNA joined lengthwise to each other. 
D) generates excessive DNA, which eventually causes the nucleus to divide. 
E) is too complex to characterize.

Question 17

Which of thfollowing terms is NOT relateto thother four?

Accepted Answer

A) amino acids 
B) nucleotides 
C) pentose sugars 
D) phosphate groups 
E) nitrogenous bases 
A) amino acids 
B) nucleotides 
C) pentose sugars 
D) phosphate groups 
E) nitrogenous bases

Question 18

Most embryos that do form

Accepted Answer

A) die shortly after birth. 
B) die before birth. 
C) have great health after birth. 
D) die before or shortly after birth. 
E) are used to produce organs such as heart and lungs. 
A) die shortly after birth. 
B) die before birth. 
C) have great health after birth. 
D) die before or shortly after birth. 
E) are used to produce organs such as heart and lungs.

Question 19

Thtwo strands of DNA arstabilizethrough

Accepted Answer

A) ionic bonds. 
B) covalent bonds. 
C) hydrogen bonds. 
D) peptide bonds. 
E) all of these. 
A) ionic bonds. 
B) covalent bonds. 
C) hydrogen bonds. 
D) peptide bonds. 
E) all of these.

Question 20

In thnucleotidsequencACTGG, what does A stands for?

Accepted Answer

A) Adam 
B) adrenaline 
C) adenine 
D) arginine 
E) albumin 
A) Adam 
B) adrenaline 
C) adenine 
D) arginine 
E) albumin

Exam 6: Dna Structure and Function

In thbonding of nitrogenous bases,

In thbonding of two nucleotides,

RosalinFranklin's research contribution was essential in

Which chromosomes arcarrieby a normal malbird?

In DNA molecules,

Which of thfollowing arreasons set by biologists to keep improving research on animal cloning?

Which of thfollowing statements is (are) truabout thfirst cloneanimal?

Which of thfollowing statements is INCORRECT about eukaryotic chromosomes?

In step "b," thtwo strands havseparatebecause

What is thnumber of chromosomes founin an oak tree?

Which of thfollowing malorganisms do NOT contain XY chromosomes?

Which of thfollowing femalorganisms do NOT contain XX chromosomes?

ThDNA moleculcoulbcompareto a

Which of thfollowing malorganisms contain two identical sex chromosomes?

After replication, each chromosomharbors

DNA replication

Which of thfollowing terms is NOT relateto thother four?

Most embryos that do form

Thtwo strands of DNA arstabilizethrough

In thnucleotidsequencACTGG, what does A stands for?

Invitation to Biology

Molecules of Life

Cell Structure

Energy and Metabolism

Capturing and Releasing Energy

Gene Expression and Control

How Cells Reproduce

Patterns of Inheritance

Biotechnology

Evidence of Evolution

Processes of Evolution

Early Life Forms and the Viruses

Plants and Fungi

Animal Evolutionunit

Population Ecology

Communities and Ecosystems

The Biosphere and Human Eff Ects

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

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