Lab 4A.

Question 1

What is the sugar in DNA?
What is the sugar in RNA?

Answer 1

Deoxyribose.
Ribose.

Question 2

What are the components in the DNA backbone?

Answer 2

5 carbon sugar.
Phosphate group.

Question 3

What bonds are found in the DNA backbone?

Answer 3

Strong Phosphodiester bonds between nucleotides.

Question 4

What bonds connect the complementary nitrogenous bases?

Answer 4

Hydrogen bonds

Question 5

What bonds connect the 5-carbon sugar to the nitrogenous base?

Answer 5

N-Glycosidic bond.

Question 6

Why is DNA acidic?

Answer 6

DNA is acidic because the phosphate group can give off protons.

Question 7

The phosphate group then
becomes ionic with full negative
charges. When a proton comes off
of an H, then a(n)
______________remains with the
oxygen.

Answer 7

Electrons.

Question 8

What is a nucleotide made up of?

Answer 8

5 carbon sugar
A phosphate group
Nitrogenous base.

Question 9

What is a nucleotide made up of?

Answer 9

5 carbon sugar
A phosphate group
Nitrogenous base.

Question 10

What is DNA?

Answer 10

DNA is the genetic material that contains the
instructions for making a protein.

Question 11

Backbone protects DNA from?

Answer 11

UV light.
Chemicals.

Question 12

What type of glycosidic linkage is found in DNA?

Answer 12

N-Glycosidic linkage.

Question 13

How many H bonds form between a T and an A?
Between a C and a G?

Answer 13

2 bonds form between T & A
3 bonds form between C & G.

Question 14

How can you tell when transcription is happening?

Answer 14

RNA polymerase & mRNA are involved.
It involves the copying of one strand.

Question 15

How can you tell when replication is happening?

Answer 15

Both strands are copied.
*Replication fork.

Question 16

1’ Forms glycosidic bond with?
2’ Contains different constituents in?
3’/5’: Forms?

Answer 16

1’: The base.
2’: Ribose and Deoxyribose.
3’ & 5’: Phosphodiester linkage between two nucleotides in the same strands.

Question 17

Nitrogenous bases are either?

Answer 17

Pyrimidines or purines.

Question 18

What is a pyrimidine?

Answer 18

A nitrogenous base with 1 ring. T & C

Question 19

What is a purine?

Answer 19

A nitrogenous base with 2 rings. A & G

Question 20

The bases are on the __________carbon
of either deoxyribose in DNA or ribose in
RNA.

Answer 20

1’ Carbon.

Question 21

What is a nucleoside?

Answer 21

Sugar with a base held together by a glycosidic bond.

Question 22

How many phosphate groups can a nucleotide have?

Answer 22

A nucleotide can have between one and three phosphate groups.

Question 23

A nucleotide with one phosphate can also be called a?
If ribose was the sugar, and uracil was the base?

Answer 23

Nucleoside monophosphate
Abbreviation:
D(*)MP: Deoxyribose (Nitrogenous base) Monophosphate.
Ribose: UMP.