Question 1

Which nucleic acid contains the anticodon?

Accepted Answer

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

Question 2

Which of the following is not a pyrimidine base?

Accepted Answer

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

Question 3

In RNA,the complement to the base guanine is cystine.

Accepted Answer

A) True 
 B)False  True

Question 4

The base shown below is one of the pyrimidine bases found in nucleic acids.

Accepted Answer

A) True 
 B)False

Question 5

The goal of the human genome project is to identify and determine the sequence of the human genetic code which consists about 20,000 genes.

Accepted Answer

A) True 
 B)False

Question 6

A form of RNA carries information from the DNA in the nucleus to the appropriate site where proteins are synthesized.Why is it necessary to have an intermediate in the form of RNA?

Accepted Answer

A) Proteins cannot be synthesized properly from DNA because the process calls for an additional step in the form of an RNA molecule because of the chemistry of synthesis. 
B) DNA is a large enough molecule that it can not leave the nucleus to move through the cytoplasm of the cell. 
C) The code carried in the DNA molecule is too large and must be broken down in to manageable pieces.RNA carries those pieces which are severed from the parent DNA molecule. 
D) The genetic code for proteins is inherited from one's parents in the form of the RNA molecule which moves throughout the cytoplasm. 
A) Proteins cannot be synthesized properly from DNA because the process calls for an additional step in the form of an RNA molecule because of the chemistry of synthesis. 
B) DNA is a large enough molecule that it can not leave the nucleus to move through the cytoplasm of the cell. 
C) The code carried in the DNA molecule is too large and must be broken down in to manageable pieces.RNA carries those pieces which are severed from the parent DNA molecule. 
D) The genetic code for proteins is inherited from one's parents in the form of the RNA molecule which moves throughout the cytoplasm.

Question 7

Insulin produced by bacteria through genetic engineering is chemically identical to human insulin.

Accepted Answer

A) True 
 B)False

Question 8

DNA replication by DNA polymerase occurs in the ____ direction on the template strand.

Accepted Answer

A) 5'$\rightarrow$3' 
B) 3'$\rightarrow$5' 
C) both ways 
D) none of these 
A) 5'$\rightarrow$3' 
B) 3'$\rightarrow$5' 
C) both ways 
D) none of these

Question 9

Cytosine and guanine can form two hydrogen bonds between them.

Accepted Answer

A) True 
 B)False

Question 10

The DNA molecule contains complementary nitrogen bases.There are four bases,but they pair as A-T and G-C with no cross pairing.How is this accomplished?

Accepted Answer

A) A and G are polar leaning heavily to the positive.T and C are negative.A-G and T-C repel each other and cannot pair. 
B) A and G do not have their polar sites in the appropriate location to pair,and the same is true of T and C. 
C) A and T have two matching but opposite polar sites.G and C have 3 polar sites.The two poles will not attract and maintain attraction for three poles. 
D) There is more than one correct response. 
A) A and G are polar leaning heavily to the positive.T and C are negative.A-G and T-C repel each other and cannot pair. 
B) A and G do not have their polar sites in the appropriate location to pair,and the same is true of T and C. 
C) A and T have two matching but opposite polar sites.G and C have 3 polar sites.The two poles will not attract and maintain attraction for three poles. 
D) There is more than one correct response.

Question 11

A region of a DNA strand carrying the information needed for the synthesis of a specific protein is called a _____ .

Accepted Answer

A) codon 
B) gene 
C) chromosome 
D) complementary base pair 
A) codon 
B) gene 
C) chromosome 
D) complementary base pair

Question 12

Two bases in adjacent strands of DNA form two hydrogen bonds.These two bases would be

Accepted Answer

A) G and C. 
B) A and T. 
C) A and U. 
D) C and T. 
A) G and C. 
B) A and T. 
C) A and U. 
D) C and T.

Question 13

What are restriction enzymes?

Accepted Answer

A) Carriers of foreign DNA into a cell that "restrict" the type of DNA introduced into the cell in the recombinant DNA technique. 
B) Protective enzymes found in some bacteria that "restrict" the type of DNA allowed in the bacterial cell by catalyzing the cleaving of other types of DNA. 
C) Circular,double-stranded DNA found in the cytoplasm of bacterial cells that "restrict" the amount of DNA in the bacteria. 
D) DNA of an organism that contains genetic material that comes from another organism and "restricts" the enzymatic activity of the host. 
A) Carriers of foreign DNA into a cell that "restrict" the type of DNA introduced into the cell in the recombinant DNA technique. 
B) Protective enzymes found in some bacteria that "restrict" the type of DNA allowed in the bacterial cell by catalyzing the cleaving of other types of DNA. 
C) Circular,double-stranded DNA found in the cytoplasm of bacterial cells that "restrict" the amount of DNA in the bacteria. 
D) DNA of an organism that contains genetic material that comes from another organism and "restricts" the enzymatic activity of the host.

Question 14

Write the sequence of mRNA in the 3' to 5' direction that would be synthesized from the following DNA sequence. 5' C-G-A-T-T-C 3'

Accepted Answer

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

Question 15

Uracil replaces the thymine in DNA when RNA is produced.

Accepted Answer

A) True 
 B)False

Question 16

The following segment of a nucleic acid could be identified as _____ .

Accepted Answer

A) GCTQ 
B) ATCG 
C) TACG 
D) GCAT 
A) GCTQ 
B) ATCG 
C) TACG 
D) GCAT

Question 17

The smallest nucleic acid is _____ .

Accepted Answer

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

Question 18

Genetically modified foods have been produced and used by people for centuries.

Accepted Answer

A) True 
 B)False

Question 19

What is the difference between deoxyribose and ribose?

Accepted Answer

A) Deoxyribose is a d form,whereas ribose does not form either d or l forms. 
B) Deoxyribose has one less oxygen atom than does ribose. 
C) Ribose is found in the straight chain structure,whereas deoxyribose is not. 
D) Ribose is a monosaccharide,but deoxyribose is a polysaccharide. 
A) Deoxyribose is a d form,whereas ribose does not form either d or l forms. 
B) Deoxyribose has one less oxygen atom than does ribose. 
C) Ribose is found in the straight chain structure,whereas deoxyribose is not. 
D) Ribose is a monosaccharide,but deoxyribose is a polysaccharide.

Question 20

The function of the mRNA molecule is to carry information from the DNA in the nucleus of the cell to locations outside the nucleus.

Accepted Answer

A) True 
 B)False

Exam 21: Nucleic Acids and Protein Synthesis

Which nucleic acid contains the anticodon?

Which of the following is not a pyrimidine base?

In RNA,the complement to the base guanine is cystine.

The base shown below is one of the pyrimidine bases found in nucleic acids.

The goal of the human genome project is to identify and determine the sequence of the human genetic code which consists about 20,000 genes.

A form of RNA carries information from the DNA in the nucleus to the appropriate site where proteins are synthesized.Why is it necessary to have an intermediate in the form of RNA?

Insulin produced by bacteria through genetic engineering is chemically identical to human insulin.

DNA replication by DNA polymerase occurs in the ____ direction on the template strand.

Cytosine and guanine can form two hydrogen bonds between them.

The DNA molecule contains complementary nitrogen bases.There are four bases,but they pair as A-T and G-C with no cross pairing.How is this accomplished?

A region of a DNA strand carrying the information needed for the synthesis of a specific protein is called a _____ .

Two bases in adjacent strands of DNA form two hydrogen bonds.These two bases would be

What are restriction enzymes?

Write the sequence of mRNA in the 3' to 5' direction that would be synthesized from the following DNA sequence. 5' C-G-A-T-T-C 3'

Uracil replaces the thymine in DNA when RNA is produced.

The following segment of a nucleic acid could be identified as _____ .

The smallest nucleic acid is _____ .

Genetically modified foods have been produced and used by people for centuries.

What is the difference between deoxyribose and ribose?

The function of the mRNA molecule is to carry information from the DNA in the nucleus of the cell to locations outside the nucleus.

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