Question 1

Cloning refers to

Accepted Answer

A) producing artificial twins. 
B) producing many DNA copies in the laboratory. 
C) nuclear transfer. 
D) producing identical copies of cats and sheep. 
E) all of these. 
A) producing artificial twins. 
B) producing many DNA copies in the laboratory. 
C) nuclear transfer. 
D) producing identical copies of cats and sheep. 
E) all of these.

Question 2

Which of thfollowing statements is true?

Accepted Answer

A) The hydrogen bonding of guanine to cytosine is an example of complementary base pairing. 
B) Adenine always pairs up with guanine in DNA, and cytosine always teams up with thymine. 
C) Each of the four nucleotides in a DNA molecule has the same nitrogen-containing base. 
D) When adenine base pairs with thymine, they are linked with three hydrogen bonds. 
E) In the DNA of all species, the amount of A+C never equals the amount of T+G. 
A) The hydrogen bonding of guanine to cytosine is an example of complementary base pairing. 
B) Adenine always pairs up with guanine in DNA, and cytosine always teams up with thymine. 
C) Each of the four nucleotides in a DNA molecule has the same nitrogen-containing base. 
D) When adenine base pairs with thymine, they are linked with three hydrogen bonds. 
E) In the DNA of all species, the amount of A+C never equals the amount of T+G.

Question 3

Four of thfivanswers listebelow arrelateto thstructurof DNA anor its composition.Select thEXCEPTION.

Accepted Answer

A) aldehyde 
B) double helix 
C) hydrogen bonds 
D) cytosine 
E) deoxyribose 
A) aldehyde 
B) double helix 
C) hydrogen bonds 
D) cytosine 
E) deoxyribose

Question 4

What was thstrategy appliein cloning thfirst animal in a laboratory?

Accepted Answer

A) A two-week-old embryo was implanted in a surrogate sheep mother. 
B) Two adult sheep cells were fused and transplanted into a surrogate sheep mother. 
C) A sheep egg was fertilized in vitro, and then the early embryo was transplanted in a surrogate sheep mother. 
D) An adult stem cell of a sheep was grown in vitro and transplanted to a surrogate sheep mother. 
E) The nucleus of an unfertilized sheep egg was removed and replaced with the nucleus of a cell taken from the udder of a different sheep. 
A) A two-week-old embryo was implanted in a surrogate sheep mother. 
B) Two adult sheep cells were fused and transplanted into a surrogate sheep mother. 
C) A sheep egg was fertilized in vitro, and then the early embryo was transplanted in a surrogate sheep mother. 
D) An adult stem cell of a sheep was grown in vitro and transplanted to a surrogate sheep mother. 
E) The nucleus of an unfertilized sheep egg was removed and replaced with the nucleus of a cell taken from the udder of a different sheep.

Question 5

Thprocess by which a cell copies its DNA beforit divides is called

Accepted Answer

A) DNA replication. 
B) DNA transcription. 
C) DNA transformation. 
D) DNA multiplication. 
E) DNA translation. 
A) DNA replication. 
B) DNA transcription. 
C) DNA transformation. 
D) DNA multiplication. 
E) DNA translation.

Question 6

Which of thfollowing sugar molecules is involvein thstructurof DNA?

Accepted Answer

A) ribose 
B) ribulose 
C) deoxyribulose 
D) deoxyribose 
E) xylose 
A) ribose 
B) ribulose 
C) deoxyribulose 
D) deoxyribose 
E) xylose

Question 7

Thstep "a" represents

Accepted Answer

A) the two parental DNA strands. 
B) the two F1 generation DNA strands. 
C) the two F2 generation DNA strands. 
D) the DNA molecule to be transcribed. 
E) the DNA molecule to be translated. 
A) the two parental DNA strands. 
B) the two F1 generation DNA strands. 
C) the two F2 generation DNA strands. 
D) the DNA molecule to be transcribed. 
E) the DNA molecule to be translated.

Question 8

Four of thfivanswers listebelow arpeoplwho helpedevelop thdoublhelix explanation of DNA.Select thEXCEPTION.

Accepted Answer

A) Wilkins 
B) Griffith 
C) Watson 
D) Franklin 
E) Crick 
A) Wilkins 
B) Griffith 
C) Watson 
D) Franklin 
E) Crick

Question 9

Nuclear transplant

Accepted Answer

A) is a process by which a defective nucleus is replaced with a healthy one. 
B) is a process by which a nucleolus is removed and replaced with another nucleolus from any other healthy cell. 
C) is a process by which the nucleus of an unfertilized egg is removed and replaced with the nucleus of an adult animal cell. 
D) is a process by which adult cells are converted into embryonic stem cells. 
E) is all of these. 
A) is a process by which a defective nucleus is replaced with a healthy one. 
B) is a process by which a nucleolus is removed and replaced with another nucleolus from any other healthy cell. 
C) is a process by which the nucleus of an unfertilized egg is removed and replaced with the nucleus of an adult animal cell. 
D) is a process by which adult cells are converted into embryonic stem cells. 
E) is all of these.

Question 10

In animal cells, __________ is (are) usually a one-way path.

Accepted Answer

A) replication 
B) translation 
C) transcription 
D) differentiation 
E) replication and translation 
A) replication 
B) translation 
C) transcription 
D) differentiation 
E) replication and translation

Question 11

A diploiorganism

Accepted Answer

A) contains several copies of the same chromosomes. 
B) contains one of each type of chromosome characteristic of the species. 
C) contains chromosomes that have the same size. 
D) contains chromosomes that have the same shape. 
E) contains two of each type of chromosome characteristic of the species. 
A) contains several copies of the same chromosomes. 
B) contains one of each type of chromosome characteristic of the species. 
C) contains chromosomes that have the same size. 
D) contains chromosomes that have the same shape. 
E) contains two of each type of chromosome characteristic of the species.

Question 12

Thconnection point of two sister chromatids is callethe

Accepted Answer

A) nucleolus. 
B) central point. 
C) centriole. 
D) centrosome. 
E) centromere. 
A) nucleolus. 
B) central point. 
C) centriole. 
D) centrosome. 
E) centromere.

Question 13

How many types of nucleotides arfounin DNA molecules?

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 4 
E) 6 
A) 1 
B) 2 
C) 3 
D) 4 
E) 6

Question 14

Which of thfollowing researchers clonean adult animal for thfirst time?

Accepted Answer

A) Ian Wilmut 
B) Louis Pasteur 
C) James Watson 
D) Francis Crick 
E) Robert Koch 
A) Ian Wilmut 
B) Louis Pasteur 
C) James Watson 
D) Francis Crick 
E) Robert Koch

Question 15

Which of thfollowing nitrogenous bases is (are) in molecules of DNA?

Accepted Answer

A) adenine 
B) guanine 
C) cytosine 
D) thymine 
E) all of these 
A) adenine 
B) guanine 
C) cytosine 
D) thymine 
E) all of these

Question 16

Body cells of human males contain

Accepted Answer

A) one X chromosome and one Y chromosome. 
B) two X chromosomes. 
C) two Y chromosomes. 
D) two O chromosomes. 
E) chromosomes X, Y, and O. 
A) one X chromosome and one Y chromosome. 
B) two X chromosomes. 
C) two Y chromosomes. 
D) two O chromosomes. 
E) chromosomes X, Y, and O.

Question 17

Which chromosomes arcarrieby a normal femalbird?

Accepted Answer

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

Question 18

Which scientist(s) suggestefor thfirst timthat thproportion of adeninanguanindiffers froonspecies to another?

Accepted Answer

A) Watso 
B) Griffith 
C) Hershey and Chase 
D) Chargaff 
E) Crick 
A) Watso 
B) Griffith 
C) Hershey and Chase 
D) Chargaff 
E) Crick

Question 19

In step "c," which bonis thonly onthat is possible?

Accepted Answer

A) A with C 
B) G with C 
C) C with T 
D) T with G 
E) A with G 
A) A with C 
B) G with C 
C) C with T 
D) T with G 
E) A with G

Question 20

Therapeutic cloning is being developein order to

Accepted Answer

A) treat some congenital diseases. 
B) treat organ failures. 
C) produce replacement tissues. 
D) treat some congenital diseases and organ failures. 
E) do all of these. 
A) treat some congenital diseases. 
B) treat organ failures. 
C) produce replacement tissues. 
D) treat some congenital diseases and organ failures. 
E) do all of these.

Exam 6: Dna Structure and Function

Cloning refers to

Which of thfollowing statements is true?

Four of thfivanswers listebelow arrelateto thstructurof DNA anor its composition.Select thEXCEPTION.

What was thstrategy appliein cloning thfirst animal in a laboratory?

Thprocess by which a cell copies its DNA beforit divides is called

Which of thfollowing sugar molecules is involvein thstructurof DNA?

Thstep "a" represents

Four of thfivanswers listebelow arpeoplwho helpedevelop thdoublhelix explanation of DNA.Select thEXCEPTION.

Nuclear transplant

In animal cells, __________ is (are) usually a one-way path.

A diploiorganism

Thconnection point of two sister chromatids is callethe

How many types of nucleotides arfounin DNA molecules?

Which of thfollowing researchers clonean adult animal for thfirst time?

Which of thfollowing nitrogenous bases is (are) in molecules of DNA?

Body cells of human males contain

Which chromosomes arcarrieby a normal femalbird?

Which scientist(s) suggestefor thfirst timthat thproportion of adeninanguanindiffers froonspecies to another?

In step "c," which bonis thonly onthat is possible?

Therapeutic cloning is being developein order to

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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