Science Quiz

Question 0

3 parts of a nucleotide are

Answer 0

Sugar, phosphate, nitrogen base

Question 1

DNA is made up of monomers called

Answer 1

Nucleotides

Question 2

The 4 nitrogen bases in DNA are

Answer 2

Adenine, Guanine, Cytosine, Thymine

Question 3

Purines have how many bases

Answer 3

2 bases

Question 4

Pyrimidines have how many bases

Answer 4

1 base

Question 5

The two purines are which two nitrogen bases

Answer 5

Adenine and Guanine

Question 6

Which two nitrogen bases are pyrimidines

Answer 6

Thymine and Cytosine

Question 7

Based on complementary base pairing rules which bases go with which

Answer 7

Adenine pairs with Thymine

Guanine pairs with Cytosine

Question 8

A purine always pairs with what

Answer 8

A pyrimidine

Question 9

DNA nucleotides always link together by what reaction

Answer 9

Condensation reaction

Question 10

The sugar of nucleotide is linked to the what of the next nucleotide and the covalent bond formed is called a what bond

Answer 10

Phosphate

Phosphodiester bond

Question 11

In a phosphodiester bond a molecule of water is

Answer 11

Released

Question 12

A DNA molecule contains how many strands of nucleotides and these nucleotides are held together by what type of weak bond

Answer 12

Hydrogen

Question 13

The shape of the DNA is

Answer 13

A double helix

Question 14

The sides of the double helix are repeating what

Answer 14

Sugar and phosphate groups

Question 15

The sequence of bases in the chain will determine what

Answer 15

Characteristics of an organism

Question 16

RNA is made of monomers called

Answer 16

Nucleotides

Question 17

The 3 parts of the nucleotide are the same except what

Answer 17

The sugar is ribose instead of deoxyribose

Question 18

The RNA bases are what

Answer 18

Adenine, Guanine, Uracil, and Cytosine

Question 19

Uracil basically takes the place of what

Answer 19

Thymine

Question 20

RNA forms a chain but what is different about the chain

Answer 20

The chain is single stranded instead of double stranded

Question 21

DNA holds the

Answer 21

Genetic information

Question 22

What does RNA help DNA do

Answer 22

Make proteins

Question 23

What phase does DNA replication occur

Answer 23

S phase of interphase

Question 24

DNA is semi- conservative, what does this mean

Answer 24

1. No DNA molecule is ever completely new | 2. There is always one original strand and one new strand

Question 25

Proteins are made up of what

Answer 25

Amino acids

Question 26

Amino acids are connected by a covalent bond called a

Answer 26

Peptide bond

Question 27

A what reaction occurs to link to amino acids together

Answer 27

A condensation reaction

Question 28

A condensation reaction releases what

Answer 28

A water molecule

Question 29

There are how many different amino acids

Answer 29

20

Question 30

mRNA, messenger RNA, does what

Answer 30

Copies code from DNA in nucleus and takes it to ribosome in cytoplasm

Question 31

tRNA, Transfer RNA, do what

Answer 31

1. Bring an amino acid to the ribosome 2. Has a cloverleaf shape 3. Anticodon on bottom pairs with codon in mRNA

Question 32

rRNA, Ribosomal RNA, are what

Answer 32

Is what the ribosome is made of- with some proteins too

Question 33

Small sections of DNA that code for proteins are called what

Answer 33

Genes

Question 34

Genes contain bases in how many groups and are called what

Answer 34

3 | Triplets

Question 35

The order of bases in a gene determine what

Answer 35

The order of amino acids in a protein

Question 36

How does the code for DNA that is in the nucleus and proteins at are made in the cytoplasm move

Answer 36

mRNA

Question 37

What happens during Transcription, and where does this happen

Answer 37

The code for DNA is copied onto mRNA and it happens in the nucleus

Question 38

What happens during Translation

Answer 38

The code on mRNA is carried to the ribosome for the amino acid to become a protein

Question 39

A gene in DNA is unzipped by what enzyme to form two strands

Answer 39

RNA polymerase

Question 40

Free what move into place along one DNA strand

Answer 40

RNA nucleotides

Question 41

What enzyme assembles these nucleotides and what does it use

Answer 41

The enzyme is RNA polymerase and it uses complementary base pairing

Question 42

The molecule of mRNA moves out to go to the ribosome and what enzyme zips it back up

Answer 42

RNA polymerase

Question 43

Any triplet in mRNA is a codon except what

Answer 43

The very last triplet, UAA

Question 44

How many combinations of triple based pairs are there

Answer 44

64

Question 45

Translation involves all 3 types of RNA, what are they

Answer 45

mRNA, tRNA, rRNA

Question 46

a tRNA molecule with a what complimentary to a mRNA start codon carries over the first amino acid of any polypeptide chain

Answer 46

Anticodon

Question 47

What bond is formed between the tRNA anticodon and the mRNA codon

Answer 47

Hydrogen bond

Question 48

The first tRNA molecule detaches from the what

Answer 48

Ribosome

Question 49

The ribosome keeps moving along, one codon at a time until it reaches the what

Answer 49

Stop codon

Question 50

Stop codons only do what

Answer 50

Tell the ribosome when to stop translation

Question 51

The polypeptide chain does what from the ribosome and takes on its function in the cell

Answer 51

Dismantles