Question 1

Using the picture below,describe the three ways that RNA is a highly dynamic biomolecule.

Accepted Answer

(1)Part a illustrates that RNA is synthe

Question 2

List the three different ways that mRNA splicing can give rise to different mRNA transcripts.

Accepted Answer

(1)Exons can be skipped or spl

Question 3

Which protein-synthesizing RNA molecule carries an amino acid to the ribosome active site?

Accepted Answer

A)  rRNA 
B)  tRNA 
C)  mRNA 
D)  siRNA 
A)  rRNA 
B)  tRNA 
C)  mRNA 
D)  siRNA

Question 4

Draw a picture of the gel electrophoresis results after DNA footprinting experiments on the following DNA strand.

Accepted Answer

The answer of Draw a picture of the gel electrophoresis...

Question 5

In which direction is mRNA synthesized by RNA polymerase?

Accepted Answer

A)  in the   to   direction 
B)  with   to   phosphodiester linkages 
C)  in the   to   direction 
D)  It depends on whether the sense or antisense strand is transcribed. 
A)  in the   to   direction 
B)  with   to   phosphodiester linkages 
C)  in the   to   direction 
D)  It depends on whether the sense or antisense strand is transcribed.

Question 6

More than 100 different RNA base modifications have been identified,and most of those are found in

Accepted Answer

A)  mRNA. 
B)  rRNA. 
C)  snRNA. 
D)  tRNA. 
A)  mRNA. 
B)  rRNA. 
C)  snRNA. 
D)  tRNA.

Question 7

List the three main ways that eukaryotic mRNA molecules are processed before translation,which prokaryotic organisms to do not require.

Accepted Answer

(1)The addition of a 7-methylg

Question 8

The initiation,elongation,and termination of eukaryotic transcription is controlled by the

Accepted Answer

A)  extent of phosphorylation and dephosphorylation of the RNA polymerase. 
B)  presence of initiation, elongation, and termination factors binding to RNA polymerase. 
C)  unwinding the double-stranded DNA. 
D)  length of the RNA transcript. 
A)  extent of phosphorylation and dephosphorylation of the RNA polymerase. 
B)  presence of initiation, elongation, and termination factors binding to RNA polymerase. 
C)  unwinding the double-stranded DNA. 
D)  length of the RNA transcript.

Question 9

The roles of U1,U2,U4,U5,and U6 in the spliceosome complex are to

Accepted Answer

A)  bind mRNA and facilitate the splicing reaction. 
B)  bind the small nuclear RNA. 
C)  carry the products from the nucleus to the cytoplasm. 
D)  bind proteins and hold the complex together. 
A)  bind mRNA and facilitate the splicing reaction. 
B)  bind the small nuclear RNA. 
C)  carry the products from the nucleus to the cytoplasm. 
D)  bind proteins and hold the complex together.

Question 10

Long noncoding RNAs (lncRNAs)are found on

Accepted Answer

A)  exons of protein-coding genes. 
B)  introns of protein-coding genes. 
C)  non-functional rRNA. 
D)  protein-coding mRNA. 
A)  exons of protein-coding genes. 
B)  introns of protein-coding genes. 
C)  non-functional rRNA. 
D)  protein-coding mRNA.

Question 11

The group I and group II introns catalyze which class of reaction?

Accepted Answer

A)  transferase 
B)  cleavage 
C)  hydrolysis 
D)  transesterification 
A)  transferase 
B)  cleavage 
C)  hydrolysis 
D)  transesterification

Question 12

Many noncoding RNAs are involved in gene silencing.Gene silencing refers to

Accepted Answer

A)  the splicing of mRNA into alternative transcripts. 
B)  defense mechanisms against RNA viruses. 
C)  mechanisms inhibiting gene expression. 
D)  the modification of genes through RNA-mediated mutation. 
A)  the splicing of mRNA into alternative transcripts. 
B)  defense mechanisms against RNA viruses. 
C)  mechanisms inhibiting gene expression. 
D)  the modification of genes through RNA-mediated mutation.

Question 13

List two differences and two similarities between group I and group II introns.

Accepted Answer

Differences: (1)Group I requires a guano

Question 14

Using the DNA footprinting technique,which of the following were/was identified as binding site(s)for   factors?

Accepted Answer

A)  -35 box 
B)  -5 and -35 box 
C)  -10 and -35 box 
D)  -10 box 
A)  -35 box 
B)  -5 and -35 box 
C)  -10 and -35 box 
D)  -10 box

Question 15

Which is true of RNA polymerases in both prokaryotic and eukaryotic organisms?

Accepted Answer

A)  They are composed of an analogous  Core. 
B)  There is a single enzyme type per organism. 
C)  They make copies of RNA from either DNA or RNA templates. 
D)  They have the same number of cofactors in prokaryotes and eukaryotes. 
A)  They are composed of an analogous  Core. 
B)  There is a single enzyme type per organism. 
C)  They make copies of RNA from either DNA or RNA templates. 
D)  They have the same number of cofactors in prokaryotes and eukaryotes.

Question 16

Cis-acting enzymes are

Accepted Answer

A)  self-operating enzymes. 
B)  enzymes that operate on a target molecule. 
C)  intermolecular-operating enzymes. 
D)  enzymes that operate on other enzymes. 
A)  self-operating enzymes. 
B)  enzymes that operate on a target molecule. 
C)  intermolecular-operating enzymes. 
D)  enzymes that operate on other enzymes.

Question 17

Name the types of catalysis in ribozymes illustrated in the two figures below.

Accepted Answer

Acid-base catalysis

Question 18

The following is referred to as the __________ ribozyme.

Accepted Answer

A)  stem-loop 
B)  hairpin 
C)  hammerhead 
D)  cloverleaf 
A)  stem-loop 
B)  hairpin 
C)  hammerhead 
D)  cloverleaf

Question 19

Describe the difference between   
factors for housekeeping genes and those for other genes.

Accepted Answer

Housekeeping genes are those that are st

Question 20

Strong prokaryotic promoters

Accepted Answer

A)  bind tightly to the transcription factors. 
B)  have  Factors that are larger, more stable proteins. 
C)  generally result in a higher rate of transcription. 
D)  are less common in prokaryotes. 
A)  bind tightly to the transcription factors. 
B)  have  Factors that are larger, more stable proteins. 
C)  generally result in a higher rate of transcription. 
D)  are less common in prokaryotes.

Exam 21: Rna Synthesis, processing, and Gene Silencing

Using the picture below,describe the three ways that RNA is a highly dynamic biomolecule.

List the three different ways that mRNA splicing can give rise to different mRNA transcripts.

Which protein-synthesizing RNA molecule carries an amino acid to the ribosome active site?

Draw a picture of the gel electrophoresis results after DNA footprinting experiments on the following DNA strand.

In which direction is mRNA synthesized by RNA polymerase?

More than 100 different RNA base modifications have been identified,and most of those are found in

List the three main ways that eukaryotic mRNA molecules are processed before translation,which prokaryotic organisms to do not require.

The initiation,elongation,and termination of eukaryotic transcription is controlled by the

The roles of U1,U2,U4,U5,and U6 in the spliceosome complex are to

Long noncoding RNAs (lncRNAs)are found on

The group I and group II introns catalyze which class of reaction?

Many noncoding RNAs are involved in gene silencing.Gene silencing refers to

List two differences and two similarities between group I and group II introns.

Using the DNA footprinting technique,which of the following were/was identified as binding site(s)for factors?

Which is true of RNA polymerases in both prokaryotic and eukaryotic organisms?

Cis-acting enzymes are

Name the types of catalysis in ribozymes illustrated in the two figures below.

The following is referred to as the __________ ribozyme.

Describe the difference between factors for housekeeping genes and those for other genes.

Strong prokaryotic promoters

Principles of Biochemistry

Physical Biochemistry: Energy Conversion,water,and Membranes

Nucleic Acid Structure and Function

Protein Structure

Methods in Protein Biochemistry

Protein Function

Enzyme Mechanisms

Cell Signaling Systems

Glycolysis: a Paradigm of Metabolic Regulation

The Citrate Cycle

Oxidative Phosphorylation

Photosynthesis

Carbohydrate Structure and Function

Carbohydrate Metabolism

Lipid Structure and Function

Lipid Metabolism

Amino Acid Metabolism

Nucleotide Metabolism

Metabolic Integration

Dna Replication, repair, and Recombination

Protein Synthesis, posttranslational Modification, and Transport

Gene Regulation

Filters