Question 1

In translation during thstagof elongation,

Accepted Answer

A) saccharides are added one after another. 
B) nucleotides are added one after another. 
C) the DNA polymerase moves along the mRNA. 
D) the RNA polymerase moves along the mRNA. 
E) the ribosome moves along the mRNA. 
A) saccharides are added one after another. 
B) nucleotides are added one after another. 
C) the DNA polymerase moves along the mRNA. 
D) the RNA polymerase moves along the mRNA. 
E) the ribosome moves along the mRNA.

Question 2

Ricin is madup of

Accepted Answer

A) two polysaccharide chains. 
B) three polysaccharide chains. 
C) a single polypeptide chain. 
D) two polypeptide chains. 
E) three polypeptide chains. 
A) two polysaccharide chains. 
B) three polysaccharide chains. 
C) a single polypeptide chain. 
D) two polypeptide chains. 
E) three polypeptide chains.

Question 3

Derivativforms of ricin arbeing developein order to treat

Accepted Answer

A) some kinds of cancer. 
B) some kinds of diabetes. 
C) some kinds of obesity. 
D) some kinds of infectious disease. 
E) all of these. 
A) some kinds of cancer. 
B) some kinds of diabetes. 
C) some kinds of obesity. 
D) some kinds of infectious disease. 
E) all of these.

Question 4

Which of thfollowing statements is (are) CORRECT about cancer?

Accepted Answer

A) Cancer is due to uncontrolled cell division. 
B) Mutations in tumor suppressor genes are likely to lead to a cancer. 
C) In some conditions, tumor cells may spread in adjacent tissues and in the rest of the body.That stage of cancer is called metastasis. 
D) Cells undergoing uncontrolled division may form a mass called a tumor. 
E) All of these are correct. 
A) Cancer is due to uncontrolled cell division. 
B) Mutations in tumor suppressor genes are likely to lead to a cancer. 
C) In some conditions, tumor cells may spread in adjacent tissues and in the rest of the body.That stage of cancer is called metastasis. 
D) Cells undergoing uncontrolled division may form a mass called a tumor. 
E) All of these are correct.

Question 5

Four of thfivanswers listebelow arfounin RNA molecules.Select thEXCEPTION.

Accepted Answer

A) adenine 
B) guanine 
C) thymine 
D) uracil 
E) cytosine 
A) adenine 
B) guanine 
C) thymine 
D) uracil 
E) cytosine

Question 6

Which of thfollowing sugars is founin RNA?

Accepted Answer

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

Question 7

Which of thfollowing statements is (are) CORRECT about ricin?

Accepted Answer

A) Ricin is a naturally occurring toxic protein. 
B) Botulinum and tetanus toxins are the only molecules that are more toxic than ricin. 
C) Ricin does not have an antidote. 
D) Ricin is obtained from the castor-oil plant. 
E) All of these are correct. 
A) Ricin is a naturally occurring toxic protein. 
B) Botulinum and tetanus toxins are the only molecules that are more toxic than ricin. 
C) Ricin does not have an antidote. 
D) Ricin is obtained from the castor-oil plant. 
E) All of these are correct.

Question 8

Which of thfollowing letters is NOT founin DNA molecules?

Accepted Answer

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

Question 9

Which of thfollowing encodes a specific RNA or a protein?

Accepted Answer

A) genotype 
B) genome 
C) division 
D) gene 
E) section 
A) genotype 
B) genome 
C) division 
D) gene 
E) section

Question 10

Mutations can be

Accepted Answer

A) random. 
B) beneficial. 
C) lethal. 
D) heritable. 
E) all of the these. 
A) random. 
B) beneficial. 
C) lethal. 
D) heritable. 
E) all of the these.

Question 11

__________ arinvolvein thregulation of genexpression.

Accepted Answer

A) Transcription factors 
B) Nucleases 
C) Transposable elements 
D) Ultraviolet light and some natural chemicals 
E) All of these 
A) Transcription factors 
B) Nucleases 
C) Transposable elements 
D) Ultraviolet light and some natural chemicals 
E) All of these

Question 12

In plant cells, energy necessary for translation is mainly provideby

Accepted Answer

A) ATP. 
B) GTP. 
C) CTP. 
D) UTP. 
E) light. 
A) ATP. 
B) GTP. 
C) CTP. 
D) UTP. 
E) light.

Question 13

Which of thfollowing components control thformation of specific body parts during thdevelopment of an embryo?

Accepted Answer

A) transcription factors 
B) master genes 
C) homeotic genes 
D) all of these 
E) none of these 
A) transcription factors 
B) master genes 
C) homeotic genes 
D) all of these 
E) none of these

Question 14

Which of thfollowing terms refers to thprocess by which cells with identical genotypes becomstructurally anfunctionally distinct froonanother?

Accepted Answer

A) metamorphosis 
B) metastasis 
C) cleavage 
D) differentiation 
E) induction 
A) metamorphosis 
B) metastasis 
C) cleavage 
D) differentiation 
E) induction

Question 15

In transcription,

Accepted Answer

A) several RNA molecules are made from the same DNA molecule. 
B) promoters are needed so the enzyme can bind to DNA. 
C) DNA produces messenger RNA. 
D) a specific enzyme called DNA polymerase is required. 
E) all of these are true. 
A) several RNA molecules are made from the same DNA molecule. 
B) promoters are needed so the enzyme can bind to DNA. 
C) DNA produces messenger RNA. 
D) a specific enzyme called DNA polymerase is required. 
E) all of these are true.

Question 16

Which of thfollowing may bcauseby exposurto UV light?

Accepted Answer

A) substitution 
B) deletion 
C) insertion 
D) development of covalent bonds between two adjacent thymine bases 
E) none of these 
A) substitution 
B) deletion 
C) insertion 
D) development of covalent bonds between two adjacent thymine bases 
E) none of these

Question 17

Which of thfollowing molecules arNOT founin ribosomes?

Accepted Answer

A) sugars 
B) nucleotides 
C) amino acids 
D) lipids 
E) nitrogenous bases 
A) sugars 
B) nucleotides 
C) amino acids 
D) lipids 
E) nitrogenous bases

Question 18

Thmessenger RNA is converteinto polypeptidsequences during thprocess of

Accepted Answer

A) replication. 
B) transcription. 
C) duplication. 
D) translation. 
E) any of these. 
A) replication. 
B) transcription. 
C) duplication. 
D) translation. 
E) any of these.

Question 19

Threlationship between strands of RNA anDNA is

Accepted Answer

A) antagonistic. 
B) opposite. 
C) complementary. 
D) an exact duplicate. 
E) unrelated. 
A) antagonistic. 
B) opposite. 
C) complementary. 
D) an exact duplicate. 
E) unrelated.

Question 20

Examine the following figure and answer questions 
  
-In this representation of transcription, stran# __________ is __________ becausit __________.

Accepted Answer

A) 2; RNA; is single-stranded 
B) 3; RNA; contains uracil 
C) 2; RNA; contains thymine 
D) 2; RNA; has no uracil 
E) 3; DNA; contains adenine 
A) 2; RNA; is single-stranded 
B) 3; RNA; contains uracil 
C) 2; RNA; contains thymine 
D) 2; RNA; has no uracil 
E) 3; DNA; contains adenine

Exam 7: Gene Expression and Control

In translation during thstagof elongation,

Ricin is madup of

Derivativforms of ricin arbeing developein order to treat

Which of thfollowing statements is (are) CORRECT about cancer?

Four of thfivanswers listebelow arfounin RNA molecules.Select thEXCEPTION.

Which of thfollowing sugars is founin RNA?

Which of thfollowing statements is (are) CORRECT about ricin?

Which of thfollowing letters is NOT founin DNA molecules?

Which of thfollowing encodes a specific RNA or a protein?

Mutations can be

__________ arinvolvein thregulation of genexpression.

In plant cells, energy necessary for translation is mainly provideby

Which of thfollowing components control thformation of specific body parts during thdevelopment of an embryo?

Which of thfollowing terms refers to thprocess by which cells with identical genotypes becomstructurally anfunctionally distinct froonanother?

In transcription,

Which of thfollowing may bcauseby exposurto UV light?

Which of thfollowing molecules arNOT founin ribosomes?

Thmessenger RNA is converteinto polypeptidsequences during thprocess of

Threlationship between strands of RNA anDNA is

Examine the following figure and answer questions -In this representation of transcription, stran# __________ is __________ becausit __________.

Invitation to Biology

Molecules of Life

Cell Structure

Energy and Metabolism

Capturing and Releasing Energy

Dna Structure and Function

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

Filters

Examine the following figure and answer questions -In this representation of transcription, stran# is becausit __.