WHAT STEP IN DNA REPLICATION PRECEDES THE PAIRING OF COMPLEMENTARY BASES?The fact that the two strands composing a DNA molecule are called antiparallel has to do with the orientation of the

WHAT STEP IN DNA REPLICATION PRECEDES THE PAIRING OF COMPLEMENTARY BASES?The fact that the two strands composing a DNA molecule are called antiparallel has to do with the orientation of the

A. sugar molecules.

Base pairing

A. requires hydrogen bonds.

B. occurs between identical bases.

C. takes place between sugars and phosphates on the two strands in a helix.

D. explains the X-ray results from Rosalind Franklin.

E. occurs between A and C.

.

5 points

Question 2

DNA replication

A. does not require proteins.

B. takes place in the nucleus of the cell.

C. occurs in G1 of interphase.

D. occurs in the cytoplasm of the cell.

E. is constantly happening in a cell.

.

5 points

Question 3

The fact that the two strands composing a DNA molecule are called antiparallel has to do with the orientation of the

A. sugar molecules.

B. bases.

C. hydrogen bonds.

D. sulfide bonds.

E. phosphate molecules.

.

5 points

Question 4

The most important experimental results that suggested to Watson and Crick that DNA was in the form of a helix was

A. the findings of Chargaff that DNA always had equal amounts of A and T and equal amounts of G and C.

B. understanding DNA replication.

C. X-ray data from Rosalind Franklin.

D. the discovery that DNA is wound around histone proteins.

E. Griffith’s results with transformation.

.

5 points

Question 5

What step in DNA replication precedes the pairing of complementary bases?

A. mitotic division.

B. polymerization of DNA.

C. separation of the two strands.

D. joining of the two strands.

E. formation of the histone core.

.

5 points

Question 6

A component of bacteria that are often used in biotechnology are

A. exons.

B. operons.

C. introns.

D. plasmids.

E. polypeptides.

.

5 points

Question 7

Normal human body cells contain how many chromosomes?

A. 42

B. 46

C. 23

D. 22

E. 44

.

5 points

Question 8

In recombinant DNA technology, enzymes used to precisely cut DNA are called

A. RNA polymerases.

B. DNA polymerases.

C. vectors.

D. DNA ligases.

E. restriction enzymes.

.

5 points

Question 9

What form of RNA carries instructions from the nucleus to the ribosome?

A. sRNA

B. rRNA

C. tRNA

D. mRNA

E. bRNA

.

5 points

Question 10

The two subunits of the ribosome join during

A. termination of transcription.

B. termination of translation.

C. initiation of translation.

D. elongation.

E. promotion of transcription.

.

5 points

Question 11

In eukaryotes, transcription occurs in the

A. cytoplasm.

B. nucleus.

C. ribosome.

D. mitochondria.

E. cell membra


 

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