first test

Question 1

who are the scientist responsible for the current model of DNA

Answer 1

Francis crick and james watson

Question 2

a second experiment was done making the DNA or the protein of bacteriophages radioactive the result showed that the genetic chemical must be what

Answer 2

DNA

Question 3

what did Rosalind franklin and Maurice wilking use to help reveal the structure of DNA

Answer 3

X-RAY

Question 4

IF the sequence of bases on one side of the DNA molecule is GATC, the correct sequence of bases on the other side is what

Answer 4

CTAG

Question 5

the upright of DNA molecule are composed of ____ paired with a _____________

Answer 5

Purine and Pyrimidme

Question 6

The rungs of DNA ladder are composed of What

Answer 6

Nitrogen bases

Question 7

In DNA four forms of the molecule each have a different type of what

Answer 7

Nitrogen bases

Question 8

The part of the molecule for which deoxyribonucleic acid is named is the

Answer 8

Surgar

Question 9

Chemic analysis finds that 20% of the bases from a certain organism is Guanine what amounts of other bases would you expect to find in this particular DNA

Answer 9

Adenine=30
thymine=30
cytosine=25

Question 10

THer term replication refers to DNA’s ability to do what

Answer 10

Copy itself

Question 11

Put the events of replicating in order (bond backbone, unzip, uncoil, and add new nucleotides)

Answer 11

Uncoil. unzip, add nucleotides, bond backbone

Question 12

In the life cycle of a cell DNA replication occurs during which phase

Answer 12

S-phase

Question 13

The process by which DNA polymerase is able to correct mismatched nucleotides is called what

Answer 13

Proof reading

Question 14

The replication of a double stranded DNA molecule begins when what unwinds the DNA and breaks what

Answer 14

DNA helicase and hydrogen bonds

Question 15

Because there any many replication forks within a single DNA molecule, replication tends to do what

Answer 15

Replicate faster

Question 16

What is the final result of DNA replication

Answer 16

2 enzymes

Question 17

why is the DNA repair sequence important to an organism’s survival

Answer 17

Correct mutation

Question 18

In gel Electrophoresis the DNA moves from one end of the gel to the other because the DNA is ________ charged

Answer 18

Negativly

Question 19

In gel electrophoresis the DNA separates because the _______ Fragments move farther than the ________ fragments

Answer 19

smaller large

Question 20

what is deoxyribose

Answer 20

a sugar derived from ribose by replacing

Question 21

what is adenine

Answer 21

a compound which is one of the four constituent bases of nucleic acids

Question 22

what is phosphates

Answer 22

a salt or ester of phosphoric acid

Question 23

what is nucleus

Answer 23

typically a single rounded structure bounded by a double membrane

Question 24

what is thymine

Answer 24

a compound which is one of the four constituent bases of nucleic acids

Question 25

what is dna

Answer 25

DNA stands for deoxyribonucleic acid. It is a chemical made up of two long molecules

Question 26

what is dna helicase

Answer 26

Unwinds the double helix at the replication fork

Question 27

what is guanine

Answer 27

one of the bases

Question 28

what is dna polymerase

Answer 28

Definition. DNA polymerase is a specific class of enzyme found in all living organisms

Question 29

what is nucleotide

Answer 29

Nucleotides form the basic structural unit of nucleic acids such as DNA

Question 30

what is cytosine

Answer 30

a compound found in living tissue as a constituent base of nucleic acids

Question 31

what is hydrogen bonds

Answer 31

a weak bond between two molecules resulting from an electrostatic attraction between a proton in one molecule and an electronegative atom in the other