UNIT 2

Question 1

What are nucleotides composed of?

Answer 1

-nitrogenous base
-a sugar
-one or more phosphates

Question 2

NItrogenous bases are what type of rings?

Answer 2

hetrocyclic

Question 3

Two types of nitrogenous bases?

Answer 3

Pyrimidals: single-ring structures

Purines: double ring structures

Question 4

Pyrimidenes

Answer 4

-cytosine
-thymine (DNA only)
-Uracil (RNA only)

Question 5

Purines

Answer 5

-adenine
-Guanine

Question 6

Sugars (pentoses) 2 types

Answer 6

-ribose

-deoxyribose (missing O from #2 carbon)

Question 7

Biological importance of nucleotides

Answer 7

• ATP ( adenosine triphosphate)
  -monomers of nucleic acids

Question 8

What linkage is used when forming nucleic acids

Answer 8

phospoester linkage

Question 9

what is DNA called?

Answer 9

deoxyribo nucleic acid

Question 10

WHat is DNA’s linkage?

Answer 10

phosphoester linkage phosphate to the sugar

Question 11

DNA froms how many nucleotides

Answer 11

millions

Question 12

T or F in DNA double strands are joined across the nitrogenous bases by hydrogen bonding

Answer 12

T

Question 13

T or F two strands are anti-parrell

Answer 13

T

Question 14

Double helix occurs when one completition turn every 10 base pairs

Answer 14

T

Question 15

Nucleotide letters

Answer 15

A,T,C,G,U

Question 16

BAse pairing

AT
GC

Answer 16

Adenine always with Thimine (2 hydrogenbonds)

Gluanine always with Cytosine (3 hydrogen bonds)

Question 17

what is RNA called

Answer 17

ribonuleic acid

Question 18

info about RNA

Answer 18

-different sugar-ribose instead of deoxyribose

-one different nitrogenous base-uracil (instead of thymine)

-Length (RNA shorter)

-RNA single stranded

-RNA is found both inside and outside the neculous (DNA is only int he nucelos)