Question 1

The chromosome of most prokaryotes differs from those of eukaryotes in that

Accepted Answer

A) the prokaryotic chromosome is linear,while the eukaryotic chromosome is circular. 
B) the prokaryotic chromosome is circular,while the eukaryotic chromosome is linear. 
C) the prokaryotic chromosome does not replicate before mitosis,while the eukaryotic chromosome does. 
D) the prokaryotic chromosome does not contain genes,while the eukaryotic chromosome does. 
E) the prokaryotic chromosome is not necessary for the organism's survival,while the eukaryotic chromosome is. 
A) the prokaryotic chromosome is linear,while the eukaryotic chromosome is circular. 
B) the prokaryotic chromosome is circular,while the eukaryotic chromosome is linear. 
C) the prokaryotic chromosome does not replicate before mitosis,while the eukaryotic chromosome does. 
D) the prokaryotic chromosome does not contain genes,while the eukaryotic chromosome does. 
E) the prokaryotic chromosome is not necessary for the organism's survival,while the eukaryotic chromosome is. B

Question 2

Define Chargaff's rules of the base composition of DNA.

Accepted Answer

Chargaff's rules include the following: (1)the amount of adenine = the amount of thymine,(2)the amount of guanine = the amount of cytosine,and (3)the amount of purines = the amount of pyrimidines.

Question 3

Which part of the T2 bacteriophage entered E.coli cells in the experiment which confirmed the identity of the transforming principle?

Accepted Answer

A) The RNA 
B) The DNA 
C) The whole virus 
D) The protein coat 
E) No part 
A) The RNA 
B) The DNA 
C) The whole virus 
D) The protein coat 
E) No part B

Question 4

Describe the differences between heterochromatin and euchromatin in chromosomes.Are there any situations in which one can be changed into the other?

Accepted Answer

Euchromatin contains actively transcribe

Question 5

DNA and RNA both contain phosphate and ribose.

Accepted Answer

A) True 
 B)False

Question 6

The DNA phage ΦΧ174 was found to have a ratio of bases of 25A:33T:24G:18C.This departs from the usual A/T = 1 and G/C = 1 ratios.How can you explain this?

Accepted Answer

The genome of the ph

Question 7

Which nucleotide is absent in RNA?

Accepted Answer

A) Adenine 
B) Guanine 
C) Uracil 
D) Cytosine 
E) Thymine 
A) Adenine 
B) Guanine 
C) Uracil 
D) Cytosine 
E) Thymine

Question 8

If the human egg has 3 billion base pairs,how many nucleosomes will be present in the nucleus of a human somatic cell?

Accepted Answer

In humans,the DNA wrapped around each nu

Question 9

Why are the amino acid sequences of eukaryotic histones so similar to one another,even among distantly related species?

Accepted Answer

Evolutionary conservation of t

Question 10

Which form of DNA is a left-handed double helix?

Accepted Answer

A) A-DNA 
B) B-DNA 
C) L-DNA 
D) R-DNA 
E) Z-DNA 
A) A-DNA 
B) B-DNA 
C) L-DNA 
D) R-DNA 
E) Z-DNA

Question 11

Which of the following is a nonhistone protein found in chromatin?

Accepted Answer

A) H1 
B) HMG 
C) H2A 
D) H5 
E) All of these 
A) H1 
B) HMG 
C) H2A 
D) H5 
E) All of these

Question 12

A Barr body is an example of

Accepted Answer

A) constitutive euchromatin. 
B) facultative euchromatin. 
C) facultative heterochromatin. 
D) a nucleosome. 
E) constitutive heterochromatin. 
A) constitutive euchromatin. 
B) facultative euchromatin. 
C) facultative heterochromatin. 
D) a nucleosome. 
E) constitutive heterochromatin.

Question 13

Match between columns
                        Premises: Chromosome
Nucleoid
Nucleotide
Nucleosome
Centromere

Accepted Answer

The Answer of The region of a prokaryotic cell where is...

Question 14

In Griffiths' transformation experiments,under what conditions did the injected mice die?

Accepted Answer

The mice died when they were i

Question 15

What are the three necessary characteristics of the hereditary molecule in cells?

Accepted Answer

(1)It must be able to carry in

Question 16

What is the role of centromeres and telomeres?

Accepted Answer

Centromeres are the chromosomal regions

Question 17

Name the constituent parts of a nucleoside and a nucleotide.

Accepted Answer

A nucleoside consists of a pen

Question 18

How could you test whether the transforming ability of a cell extract was due to DNA or RNA?

Accepted Answer

You could treat the extract wi

Question 19

The C-value is the amount of DNA in a

Accepted Answer

A) haploid genome. 
B) diploid genome. 
C) bacterial genome. 
D) eukaryotic genome. 
E) cell's nucleus. 
A) haploid genome. 
B) diploid genome. 
C) bacterial genome. 
D) eukaryotic genome. 
E) cell's nucleus.

Question 20

One of the strands in a DNA double helix has the nucleotide sequence 5'-ACCTGCTACGG-3'.What is the sequence of the complementary DNA strand?

Accepted Answer

The answer of One of the strands in a DNA...

Exam 2: DNA: The Genetic Material

The chromosome of most prokaryotes differs from those of eukaryotes in that

Define Chargaff's rules of the base composition of DNA.

Which part of the T2 bacteriophage entered E.coli cells in the experiment which confirmed the identity of the transforming principle?

Describe the differences between heterochromatin and euchromatin in chromosomes.Are there any situations in which one can be changed into the other?

DNA and RNA both contain phosphate and ribose.

The DNA phage ΦΧ174 was found to have a ratio of bases of 25A:33T:24G:18C.This departs from the usual A/T = 1 and G/C = 1 ratios.How can you explain this?

Which nucleotide is absent in RNA?

If the human egg has 3 billion base pairs,how many nucleosomes will be present in the nucleus of a human somatic cell?

Why are the amino acid sequences of eukaryotic histones so similar to one another,even among distantly related species?

Which form of DNA is a left-handed double helix?

Which of the following is a nonhistone protein found in chromatin?

A Barr body is an example of

In Griffiths' transformation experiments,under what conditions did the injected mice die?

What are the three necessary characteristics of the hereditary molecule in cells?

What is the role of centromeres and telomeres?

Name the constituent parts of a nucleoside and a nucleotide.

How could you test whether the transforming ability of a cell extract was due to DNA or RNA?

The C-value is the amount of DNA in a

One of the strands in a DNA double helix has the nucleotide sequence 5'-ACCTGCTACGG-3'.What is the sequence of the complementary DNA strand?

Genetics: An Introduction

DNA Replication

Gene Function

Gene Expression: Transcription

Gene Expression: Translation

Dna Mutation, DNA Repair, and Transposable Elements

Genomics: The Mapping and Sequencing of Genomes

Functional and Comparative Genomics

Recombinant DNA Technology

Mendelian Genetics

Chromosomal Basis of Inheritance

Extensions of and Deviations From Mendelian Genetic Principles

Genetic Mapping in Eukaryotes

Genetics of Bacteria and Bacteriophages

Variations in Chromosome Structure and Number

Regulation of Gene Expression in Bacteria and Bacteriophages

Regulation of Gene Expression in Eukaryotes

Genetic Analysis of Development

Genetics of Cancer

Population Genetics

Quantitative Genetics

Molecular Evolution

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