nucleic acids

Question 1

what are the three components of a nucleotide

Answer 1

phosphate
pentosugar-ribose,deoxyribose
nitrogen containing base

Question 2

what are nuceic acids

Answer 2

polymers made of nucleotide monomers

Question 3

what does the a stand for

Answer 3

adrenine

Question 4

what does the c stand for

Answer 4

cytosine

Question 5

what does the t stand for

Answer 5

thymine

Question 6

what does the g stand for

Answer 6

guanine

Question 7

what does the u stand for

Answer 7

uracil

Question 8

what is only in ribonucleic acid

Answer 8

uracil

Question 9

what is only in deoyribose

Answer 9

thymine

Question 10

if we join multiple nucleotides we form

Answer 10

polynucleotides

Question 11

two mononucleictides can be joined together to form a ————

Answer 11

dinucleotides

Question 12

there is a ——— reaction between the deoxyribose sugar on one —– and the ——— group of another

Answer 12

condensation
nucleotide
phosphate

Question 13

the bond formed between a phosphate group and a pentosugar is called

Answer 13

phosphodiester bond

Question 14

RNA
only conains

Answer 14

adrenine cytosine,uracil,guanine

Question 15

RNA
a —— sugar attaches to a ———- group and an ——— base.

Answer 15

ribose
phosphate
organic

Question 16

RNA
molecules are ——– and —–

Answer 16

short
single stranded

Question 17

what are the three types of RNA

Answer 17

mRNA-carries dna code from nucleus to ribosome
tRNA-transfer rna that carries amino acids across cyptoplasm
rRNA-makes up ribosomes

Question 18

what is not in NA

Answer 18

thymine

Question 19

DNA
made up of ——

Answer 19

deoxyribose

Question 20

DNA
contains what bases

Answer 20

adenine,cytosine,guanine,thymine

Question 21

DNA structure

Answer 21

-double helix composed of two polynucleotides join together by hydrogen bonds bewtween complementary bases

Question 22

In DNA how do the 2 strands lie

Answer 22

antiparell

Question 23

complementary base pairing takes place between what strands

Answer 23

5 to 3 strand and 3 to 5 strand

Question 24

what does purine always bind to

Answer 24

a pyrimidine base

Question 25

what bond forms between a nucleotide

Answer 25

phosphodiester bond

Question 26

what is RNAs structure

Answer 26

short polynucleotide chain

Question 27

what does semi conservative replication of DNA enable

Answer 27

genetic continuity between genertaions of cells (genetic information is passed on from one generation to another) this occurs in the s stage of the cell cycle

Question 28

what is the first step of semi conservative replication

Answer 28

-double helix unwinds + the hydrogen bond between the complementary bases breaks using DNA helicase -seperating the two strands of DNA

Question 29

2nd step of semi conservative replication

Answer 29

one of the stands is used as the template and complementary base pairing occurs between template strand and free nucleotides

Question 30

3rd step semi conservative replication

Answer 30

adjacent nucleotides are joined by phosphodiester bonds formed condensation reactions using DNA polymerase