NVCC BIO 101 EXAM 3 questions with verified
answers
What are the 3 characteristics of DNA? Ans✓✓-1. Must be able to code for the
sequence of amino acids in proteins and control protein synthesis
2. Must be able to replicate itself prior to cell division
3. Must be able to change over time to account for evolutionary change
(evolution)
Is this statement correct? Two kinds of molecules participate in protein synthesis:
deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). Ans✓✓-True
Is this statement correct? The purines, cytosine, thymine, and uracil, have a
single-ring structure. Ans✓✓-False: They are not Purines
Is this statement correct? Deoxyribonucleic (DNA) acid has one less hydroxyl
group than ribonucleic acid (RNA) Ans✓✓-True
Is this statement correct? Each strand of DNA is oriented such that the 3' carbons
of deoxyribose in one strand are oriented in the opposite directions from the 3'
carbons in the other strand, thus, the two strands of DNA have opposite
orientations and the DNA molecule is said to be antiparallel. Ans✓✓-True
Is this statement correct? In a DNA molecule, adenine always bonds to thymine,
and cytosine always bonds with guanine Ans✓✓-True
, Is this statement correct? Thymine is not present in a DNA molecule. Ans✓✓-
False: It's present ONLY in DNA
Is this statement correct? There is a triple bond between cytosine and guanine
and a double bond between adenine and thymine. Both bonds are hydrogen
bonds and, coupled with hydrophobic forces, help the DNA molecule remain
together. Ans✓✓-True
Replication of DNA requires the existing double helix to separate into two
template strands. This separation is accomplished by: Ans✓✓-Helicase
Where (what site) does DNA separation happen? Ans✓✓-Replication Fork
(Origin) of the Replication Site
After the DNA strands have been separated ___ stabilizes the individual strands
so that replication can continue. Ans✓✓-Topoisomerase
___ assembles an RNA primer at the origin of the replication site. Ans✓✓-
Primase
Is this statement correct? DNA polymerase adds new nucleotides to RNA primer.
The DNA nucleotides are collected from the cell's cytoplasm. Ans✓✓-True
The RNA primer is removed and replaced with an appropriate sequence of DNA
nucleotides. Which enzymes help to directly facilitate this process? Ans✓✓-
Nucleotide Replacement Enzymes
answers
What are the 3 characteristics of DNA? Ans✓✓-1. Must be able to code for the
sequence of amino acids in proteins and control protein synthesis
2. Must be able to replicate itself prior to cell division
3. Must be able to change over time to account for evolutionary change
(evolution)
Is this statement correct? Two kinds of molecules participate in protein synthesis:
deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). Ans✓✓-True
Is this statement correct? The purines, cytosine, thymine, and uracil, have a
single-ring structure. Ans✓✓-False: They are not Purines
Is this statement correct? Deoxyribonucleic (DNA) acid has one less hydroxyl
group than ribonucleic acid (RNA) Ans✓✓-True
Is this statement correct? Each strand of DNA is oriented such that the 3' carbons
of deoxyribose in one strand are oriented in the opposite directions from the 3'
carbons in the other strand, thus, the two strands of DNA have opposite
orientations and the DNA molecule is said to be antiparallel. Ans✓✓-True
Is this statement correct? In a DNA molecule, adenine always bonds to thymine,
and cytosine always bonds with guanine Ans✓✓-True
, Is this statement correct? Thymine is not present in a DNA molecule. Ans✓✓-
False: It's present ONLY in DNA
Is this statement correct? There is a triple bond between cytosine and guanine
and a double bond between adenine and thymine. Both bonds are hydrogen
bonds and, coupled with hydrophobic forces, help the DNA molecule remain
together. Ans✓✓-True
Replication of DNA requires the existing double helix to separate into two
template strands. This separation is accomplished by: Ans✓✓-Helicase
Where (what site) does DNA separation happen? Ans✓✓-Replication Fork
(Origin) of the Replication Site
After the DNA strands have been separated ___ stabilizes the individual strands
so that replication can continue. Ans✓✓-Topoisomerase
___ assembles an RNA primer at the origin of the replication site. Ans✓✓-
Primase
Is this statement correct? DNA polymerase adds new nucleotides to RNA primer.
The DNA nucleotides are collected from the cell's cytoplasm. Ans✓✓-True
The RNA primer is removed and replaced with an appropriate sequence of DNA
nucleotides. Which enzymes help to directly facilitate this process? Ans✓✓-
Nucleotide Replacement Enzymes
