Question 1

During transcription,_____.

Accepted Answer

A) non-coding sequences are removed from the RNA transcript 
B) regulatory proteins attach to the DNA at the promoter site 
C) DNA polymerase assembles RNA nucleotides 
D) the entire DNA strand opens up for complete gene transcription 
E) tRNA brings nucleotides to the DNA strand 
A) non-coding sequences are removed from the RNA transcript 
B) regulatory proteins attach to the DNA at the promoter site 
C) DNA polymerase assembles RNA nucleotides 
D) the entire DNA strand opens up for complete gene transcription 
E) tRNA brings nucleotides to the DNA strand

Question 2

Identify the type of mutation associated with the following questions and statements.Some answers may be used more than once.
-If UUA codes for leucine (leu),UUU codes for phenylalanine (phe),AUU codes for isoleucine (iso),AAA codes for asparagine (asn)and UAA codes for a stop codon,which type of mutation would be responsible for changing the protein sequence from leu-phe-iso-iso-stop to leu-phe-leu-phe-asn-stop

Accepted Answer

A) Deletion only 
B) Insertion only 
C) Base-pair substitution 
D) Frame-shift mutation 
A) Deletion only 
B) Insertion only 
C) Base-pair substitution 
D) Frame-shift mutation

Question 3

Homeotic genes are,in general,in control of _____.

Accepted Answer

A) X chromosome inactivation 
B) formation of major body parts 
C) methylation of nucleotides 
D) dosage compensation 
E) sex determination 
A) X chromosome inactivation 
B) formation of major body parts 
C) methylation of nucleotides 
D) dosage compensation 
E) sex determination

Question 4

Transcription _____.

Accepted Answer

A) uses both strands of DNA as templates 
B) uses the enzyme DNA polymerase 
C) results in a double-stranded end product 
D) produces three different types of RNA molecules 
E) does not require the hydrogen bonds of DNA to be broken 
A) uses both strands of DNA as templates 
B) uses the enzyme DNA polymerase 
C) results in a double-stranded end product 
D) produces three different types of RNA molecules 
E) does not require the hydrogen bonds of DNA to be broken

Question 5

Identify the type of mutation associated with the following questions and statements.Some answers may be used more than once.
-What type of mutation occurred if the sequence GGACTCCTCCTCAGA is changed to GGACTCCTTCCTCAGA?

Accepted Answer

A) Deletion only 
B) Insertion only 
C) Base-pair substitution 
D) Frame-shift mutation 
A) Deletion only 
B) Insertion only 
C) Base-pair substitution 
D) Frame-shift mutation

Question 6

Ricin inactivates _____.

Accepted Answer

A) proteins 
B) ribosomes 
C) DNA 
D) transcription factors 
E) mRNA 
A) proteins 
B) ribosomes 
C) DNA 
D) transcription factors 
E) mRNA

Question 7

How many nucleotides comprise one codon?

Accepted Answer

A) 2 
B) 3 
C) 5 
D) 6 
E) 16 
A) 2 
B) 3 
C) 5 
D) 6 
E) 16

Question 8

Homeotic genes encode which type of protein?

Accepted Answer

A) transcription factors 
B) ribosomal proteins 
C) channel proteins 
D) membrane-associated proteins 
E) DNA methylases 
A) transcription factors 
B) ribosomal proteins 
C) channel proteins 
D) membrane-associated proteins 
E) DNA methylases

Question 9

tRNA differs from other types of RNA because it _____.

Accepted Answer

A) acts as an enzyme 
B) is only involved in transcription 
C) binds to mRNA 
D) codes for multiple amino acids 
E) is complexed with a protein 
A) acts as an enzyme 
B) is only involved in transcription 
C) binds to mRNA 
D) codes for multiple amino acids 
E) is complexed with a protein

Question 10

Sphynx cats have a mutation in a(n)_____ of the keratin gene,which prevents necessary splicing; therefore,keratin protein fibers do not assemble properly.

Accepted Answer

A) promoter 
B) intron-exon splice site 
C) exon 
D) stop codon 
E) enhancer 
A) promoter 
B) intron-exon splice site 
C) exon 
D) stop codon 
E) enhancer

Question 11

Identify the type of mutation associated with the following questions and statements.Some answers may be used more than once.
-What type of mutation is least likely to alter the amino acid sequence?

Accepted Answer

A) Deletion only 
B) Insertion only 
C) Base-pair substitution 
D) Frame-shift mutation 
A) Deletion only 
B) Insertion only 
C) Base-pair substitution 
D) Frame-shift mutation

Question 12

In prokaryotes,translation takes place in the _____.

Accepted Answer

A) cytoplasm 
B) nucleus 
C) plasma membrane 
D) endoplasmic reticulum 
E) Golgi bodies 
A) cytoplasm 
B) nucleus 
C) plasma membrane 
D) endoplasmic reticulum 
E) Golgi bodies

Question 13

What is the maximum number of different tRNA's in a eukaryotic cell?

Accepted Answer

A) 3 
B) 20 
C) 60 
D) 61 
E) 64 
A) 3 
B) 20 
C) 60 
D) 61 
E) 64

Question 14

Which molecule initiates translation after an egg is fertilized?

Accepted Answer

A) maternal mRNA 
B) paternal promoters in sperm 
C) maternal transcription factors 
D) transposable elements 
E) paternal DNA 
A) maternal mRNA 
B) paternal promoters in sperm 
C) maternal transcription factors 
D) transposable elements 
E) paternal DNA

Question 15

A ribosome contains _____.

Accepted Answer

A) RNA only 
B) DNA only 
C) proteins only 
D) RNA and proteins 
E) RNA, DNA, and proteins 
A) RNA only 
B) DNA only 
C) proteins only 
D) RNA and proteins 
E) RNA, DNA, and proteins

Question 16

The difference between normal and sickle-cell hemoglobin is _____.

Accepted Answer

A) the number of amino acids in the molecule 
B) the substitution of one amino acid for another 
C) the number and orientation of the amino acid chains attached to the heme portion of the molecule 
D) the number of oxygen molecules that can be carried 
E) the types of blood cells that produce each protein 
A) the number of amino acids in the molecule 
B) the substitution of one amino acid for another 
C) the number and orientation of the amino acid chains attached to the heme portion of the molecule 
D) the number of oxygen molecules that can be carried 
E) the types of blood cells that produce each protein

Question 17

In this representation of transcription,strand # ____ is ____ because it ____.

Accepted Answer

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

Question 18

During transcription,adenine is complementary to _____.

Accepted Answer

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

Question 19

Match each term with the most appropriate description.
-sites for polypeptide assembly

Accepted Answer

A) Anticodon 
B) rRNA 
C) Codon 
D) Ribosome 
E) genetic code
F)translation termination
G)messenger RNA
H)Promoters
I)Transcription
J)Translation 
A) Anticodon 
B) rRNA 
C) Codon 
D) Ribosome 
E) genetic code
F)translation termination
G)messenger RNA
H)Promoters
I)Transcription
J)Translation

Question 20

Most of the energy required to form the peptide bonds during elongation comes from _____.

Accepted Answer

A) ATP 
B) CTP 
C) GTP 
D) TTP 
E) whichever nucleotide is at the front of the codon 
A) ATP 
B) CTP 
C) GTP 
D) TTP 
E) whichever nucleotide is at the front of the codon

During transcription,_____.

Homeotic genes are,in general,in control of _____.

Transcription _____.

Identify the type of mutation associated with the following questions and statements.Some answers may be used more than once. -What type of mutation occurred if the sequence GGACTCCTCCTCAGA is changed to GGACTCCTTCCTCAGA?

Ricin inactivates _____.

How many nucleotides comprise one codon?

Homeotic genes encode which type of protein?

tRNA differs from other types of RNA because it _____.

Sphynx cats have a mutation in a(n)_____ of the keratin gene,which prevents necessary splicing; therefore,keratin protein fibers do not assemble properly.

Identify the type of mutation associated with the following questions and statements.Some answers may be used more than once. -What type of mutation is least likely to alter the amino acid sequence?

In prokaryotes,translation takes place in the _____.

What is the maximum number of different tRNA's in a eukaryotic cell?

Which molecule initiates translation after an egg is fertilized?

A ribosome contains _____.

The difference between normal and sickle-cell hemoglobin is _____.

In this representation of transcription,strand # is because it .

During transcription,adenine is complementary to _____.

Match each term with the most appropriate description. -sites for polypeptide assembly

Most of the energy required to form the peptide bonds during elongation comes from _____.

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 Evolution

Population Ecology

Communities And Ecosystems

The Biosphere And Human Effects

Filters

Exam 7: Gene Expression AND Control

During transcription,_____.

Homeotic genes are,in general,in control of _____.

Transcription _____.

Identify the type of mutation associated with the following questions and statements.Some answers may be used more than once. -What type of mutation occurred if the sequence GGACTCCTCCTCAGA is changed to GGACTCCTTCCTCAGA?

Ricin inactivates _____.

How many nucleotides comprise one codon?

Homeotic genes encode which type of protein?

tRNA differs from other types of RNA because it _____.

Sphynx cats have a mutation in a(n)_____ of the keratin gene,which prevents necessary splicing; therefore,keratin protein fibers do not assemble properly.

Identify the type of mutation associated with the following questions and statements.Some answers may be used more than once. -What type of mutation is least likely to alter the amino acid sequence?

In prokaryotes,translation takes place in the _____.

What is the maximum number of different tRNA's in a eukaryotic cell?

Which molecule initiates translation after an egg is fertilized?

A ribosome contains _____.

The difference between normal and sickle-cell hemoglobin is _____.

In this representation of transcription,strand # ____ is ____ because it ____.

During transcription,adenine is complementary to _____.

Match each term with the most appropriate description. -sites for polypeptide assembly

Most of the energy required to form the peptide bonds during elongation comes from _____.

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 Evolution

Population Ecology

Communities And Ecosystems

The Biosphere And Human Effects

Filters

In this representation of transcription,strand # is because it .