Module 7-8

Question 1

Which enzyme unwraps the double helix?

Answer 1

Helicase

Question 2

RNA is double stranded. (T/f)

Answer 2

False

Question 3

The DNA polymerase that replicates the parental strand of DNA reads the parental DNA from 5’ to 3’ and makes a new DNA strand from 3’ to 5’. (T/f)

Answer 3

False

Question 4

Assume you have a eukaryotic cell with three chromosomes within it. How many 5’ ends would there be?

Answer 4

Gap1: 6; gap2: 12

Question 5

In DNA, what does the nucleotide labeled A pair with?

Answer 5

T (thymine)

Question 6

Which strand is produced more rapidly?

Answer 6

Leading strand

Question 7

In the lagging strand, the DNA is read from the parental DNA’s 3’ to 5’ end. (T/f)

Answer 7

True

Question 8

Strands of the backbone of DNA are parallel. (T/f)

Answer 8

False

Question 9

In the ribosome, what is the name of the bond that links one amino acid to the next?

Answer 9

Peptide bond

Question 10

During mRNA maturation what is the name of the part of the mRNA that is removed?

Answer 10

Intron

Question 11

Replication of DNA is semi- conservative? (T/f)

Answer 11

True

Question 12

During DNA replication in the lagging strand there is production of this component?
A) Okazaki fragment
B) mRNA
C) tRNA
D) proteins
D) None of the above

Answer 12

Okazaki fragment

Question 13

During DNA replication errors are greatly reduced by enzymes that proof read the newly replicated DNA. (T/f)

Answer 13

True

Question 14

In the ribosome, what pairs with codon?

Answer 14

Anti-codon

Question 15

The double helix of DNA is wrapped around 1 3/4 times around which of these components?
A) helicase
B) DNA polymerase Ill
C) DNA polymerase l
D) nucleosome
E) DNA ligase

Answer 15

nucleosome

Question 16

Protein synthesis changes from the language of _____ to the language of ______

Answer 16

Nucleotides, amino acids

Question 17

For DNA polymerase lll to work, which component has to work first?
A) conservative replication
B) newly replicated strand
C) primase
D) RNA
E) mutation rate

Answer 17

primase

Question 18

How many hydrogen bonds are there between an A and its paired nucleotide?

Answer 18

2

Question 19

Which sugar is present in RNA?

Answer 19

Ribose

Question 20

DNA replication in eukaryotes is sped up by multiple origins of replication. (T/f)

Answer 20

True

Question 21

RNA synthesis, also called RNA transcription occurs in three phases. List them from beginning to end in order

Answer 21

Initiation, elongation, termination

Question 22

Uridine is a nucleotide in DNA. (T/f)

Answer 22

False

Question 23

List one type of post-translational modification

Answer 23

Phosphorylation

Question 24

List the two basic categories of nitrogenous bases in nuclei acids

Answer 24

Purines and pyrimidines

Question 25

In eukaryotic cells the start codon for protein synthesis is

Answer 25

Methionine (AUG)

Question 26

Which nucleotide is different in RNA compared to DNA?

Answer 26

Uridine

Question 27

There are two types of protein synthesis in eukaryotic cells. These two types can be distinguished because the polyribosome is either _______ or _________

Answer 27

Free; membrane bound

Question 28

How many “stop” codons exist?

Answer 28

Three

Question 29

The genetic code for the conversion of mRNA codons to proteins has redundancy. (T/f)

Answer 29

True

Question 30

Which enzyme is used first to permit DNA polymerase Ill to begin replicating the 3’ strand?
A) conservative replication
B) parental strand
C) primase
D) RNA
E) mutation rate

Answer 30

Primase

Question 31

Draw the sugar in DNA and label the carbons as discussed in the lecture. Then circle the carbon that is different in RNA.

Answer 31

…

Question 32

The antenna system is in the ______ membranes

Answer 32

Thylakoid

Question 33

List three items required for photosynthesis to occur

Answer 33

Water, CO2, light

Question 34

The light reactions produce ________ and ______ and this process also results in the release of _______

Answer 34

ATP, NADPH+H+, oxygen

Question 35

The most abundant protein in the world is called

Answer 35

Rubisco

Question 36

The Calvin-Benson cycle takes in ______ and ________ from the light reaction and also _______ ________ to make carbonyorates

Answer 36

ATP, NADPH+H+, carbon dioxide