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Unit 7 Review

Total questions: 50

Worksheet time: 38mins

Name
Class
Date
1.

DNA codes for...

a)

unique combinations of characteristics for organisms.

b)

weather and weather patterns.

c)

decisions that people make.

d)

your Quizizz responses.

2.

Watson and Crick are credited for...

a)

establishing the structure of DNA.

b)

giving Rosalind Franklin lots of credit for her findings.

c)

establishing the Periodic Table of Elements.

d)

x-ray diffraction photos of DNA.

3.

X-ray diffraction photographs by ____________ suggested that DNA molecules are arranged as a tightly coiled helix.

a)

Franklin

b)

Crick

c)

Watson

d)

Einstein

4.

The models that demonstrated that DNA forms a double-helix were created by _________ and ___________.

a)

Watson; Crick

b)

Einstein; Crick

c)

Franklin; Wilkins

d)

Mendeleev; Watson

5.

Who built models that demonstrated that DNA is made of two chains in a double helix?

a)

Watson

b)

Crick

c)

Watson and Crick

d)

Franklin

6.

According to Chagraff's rules, the amount _______ is equal to the amount of ________ in DNA.

a)

cytosine ; guanine

b)

guanine ; thymine

c)

adenine ; cytosine

d)

uracil ; thymine

7.

In DNA - Adenine bonds with ________, and Guanine bonds with _________.

a)

Thymine ; Cytosine

b)

Cytosine ; Thymine

c)

Guanine ; Cytosine

d)

Uracil ; Cytosine

8.

ATTG : TAAC ::

a)

GTCC : CAGG

b)

AAAT : TTTG

c)

TCGG : AGAT

d)

CGAA : TGCG

9.

DNA polymerase...

a)

adds nucleotides to DNA.

b)

adds nucleotides to RNA.

c)

breaks hydrogen bonds between nitrogenous bases.

d)

breaks covalent bonds between phosphate and deoxyribose.

10.

Which of the following is not true about DNA replication?

a)

It must occur before a cell can divide.

b)

Two complementary strands are duplicated.

c)

The double strand unwinds while it is being duplicated.

d)

All choices are correct

11.

Match the correct complementary strand that will occur during DNA Replication if the original strand is TGTACT

a)

ACATGA

b)

TCTAGA

c)

AGTAGC

d)

TGTACT

12.

DNA Polymerase is a(n)...

a)

enzyme.

b)

amino acid.

c)

helicase.

d)

nucleotidase.

13.

What is the enzyme that adds nucleotides to to exposed DNA templates?

a)

DNA Polymerase

b)

RNA Polymerase

c)

Helicase

d)

Amino Acidase

14.

What is the thing that its primary function is to store and transmit genetic information?

a)

DNA

b)

Proteins

c)

Enzymes

d)

Ribosomes

15.

What is the things that transfers amino acids to the ribosomes?

a)

tRNA

b)

mRNA

c)

rRNA

d)

helicase

16.

mRNA carries instructions for...

a)

making proteins.

b)

making other types of RNA.

c)

fixing the cell.

d)

all choices are correct.

17.

Which of these is single-stranded, and contains ribose and uracil?

a)

RNA

b)

DNA

c)

Helicase

d)

Polymerase

18.

Select the nitrogenous base not found in DNA.

a)

Uracil

b)

Cytosine

c)

Guanine

d)

Thymine

e)

Adenine

19.

In RNA, adenine is complementary to...

a)

uracil.

b)

thymine.

c)

cytosine.

d)

guanine.

20.

mRNA: GAGAAGUGCUUC

a)

Ser—Lys—Cys—Phe

b)

Ser—Tyr—Arg—Gly

c)

Val—Asp—Pro—His

d)

Pro—Glu—Leu—Val

21.

mRNA: CUCAAGUGCUUC

Refer to the illustration above. Which of the following would represent the strand of DNA from which the mRNA strand was made?

a)

GAGTTCACGAAG

b)

CUCAAGUGCUUC

c)

GAGUUCACGAAG

d)

AGACCTGTAGGA

22.

mRNA: CUCAAGUGCCUU

Refer to the illustration above. The anticodons for the codons in the mRNA in the diagram are

a)

GAG—UUC—ACG—GAA

b)

GAG—TTC—ACG—AAG.

c)

CUC—GAA—CGU—CUU.

d)

CUU—CGU—GAA—CUC.

23.

During translation, a ribosome binds to

a)

mRNA

b)

DNA

c)

protein.

d)

a peptide bond.

24.

All of the following are true about the structure of DNA except

a)

short strands of DNA are contained in chromosomes inside the nucleus of a cell.

b)

every DNA nucleotide contains a sugar, a phosphate group, and a base.

c)

DNA consists of two strands of nucleotides joined by hydrogen bonds.

d)

the long strands of nucleotides are twisted into a double helix.

25.

Which of the following are a type of RNA?

a)

Messenger RNA

b)

Transfer RNA

c)

Ribosomal RNA

d)

All choices are correct

26.

Where does protein synthesis occur?

a)

ribosomes

b)

mitochondria

c)

DNA

d)

nucleus

27.

What is produced during transcription?

a)

RNA

b)

DNA

c)

proteins

d)

translation

28.

Genetic information encoded in DNA is transferred to an RNA molecule during...

a)

transcription.

b)

translation.

c)

replication.

d)

annihilation

29.

Each nucleotide triplet in mRNA that specifies a particular amino acid is called a(n)...

a)

codon.

b)

mutagen.

c)

anticodon.

d)

intron.

30.

During translation, the amino acid detaches from the transfer RNA molecule and attaches to the end of a growing protein chain when

a)

the ribosomal RNA anticodon is paired up with the messenger RNA codon.

b)

the transfer RNA anticodon is paired up with the messenger RNA codon.

c)

a “stop” codon is encountered.

d)

the protein chain sends a signal through the nerve cells to the brain.

31.

What is an error in DNA replication called?

a)

mutation

b)

helicase

c)

intron

d)

variant

32.

What is this an example of?

a)

DNA

b)

RNA

c)

Protein

d)

Amino Acid

33.

DNA is made up of...

a)

nucleotides

b)

amino acids

c)

fatty acids

d)

monosaccharides

34.

Which of these is not one of the three parts of a nucleotide?

a)

Phosphate Group

b)

Deoxyribose

c)

Nitrogenous Base

d)

Amino Acid

35.

True/False - Pyrimidines in DNA is about equal to the percentage of purines.

a)

True

b)

False

36.

Where is DNA located in eukaryotic cells?

a)

nucleus

b)

cytoplasm

c)

ribosomes

d)

mitochondria

37.

Replication is when...

a)

DNA gets copied.

b)

RNA gets produced.

c)

proteins get produced.

d)

All choices are correct.

38.

DNA replication results in two DNA molecules,

a)

each with two new strands.

b)

one with two new strands and the other with two original strands.

c)

each with one new strand and one original strand.

d)

each with two original strands.

39.

What sugar is found in RNA?

a)

Ribose

b)

Deoxyribose

c)

Helicase

d)

Polymerase

40.

Which of these nitrogenous bases is not found in DNA?

a)

uracil

b)

cytosine

c)

adenine

d)

thymine

41.

How many types of RNA are there?

a)

3

b)

4

c)

2

d)

1

42.

Which type of RNA is used during protein synthesis?

a)

All choices are correct

b)

mRNA

c)

tRNA

d)

rRNA

43.

RNA molecules are produced during...

a)

transcription.

b)

translation.

c)

polymerization.

d)

replication.

44.

Where are RNA molecules formed during transcription?

a)

in the nucleus

b)

in the cytoplasm

c)

in the ribosomes

d)

in the mitochondria

45.

If you wanted to form 4 amino acids, how many bases would you need?

a)

12

b)

9

c)

6

d)

2

46.

What type of RNA functions as a blueprint?

a)

mRNA

b)

tRNA

c)

rRNA

d)

all choices are correct

47.

A medical test indicates that a patient has a defective protein. This condition is most likely due to a change in the directions coded in the:

a)

number of hydrogen atoms in starch molecules

b)

sequence of inorganic molecules

c)

number of carbon atoms in sugar molecules

d)

sequence of subunits in DNA

48.

Which segments are correctly paired with their complementary strand?

a)

1, 2, 4

b)

2, 3, 4

c)

1, 2, 3

d)

1, 3, 4

49.

In the semiconservative replication of DNA, the produced DNA molecules consist of:

a)

all molecules with one parental and one new strand

b)

one-half of the molecules with two parental strands and one-half of the molecules with two new strands

c)

all molecules with randomly mixed parental and new segments

d)

all molecules with two new strands

50.

Purines and pyrimidines are

a)

bases found in nucleotides.

b)

bases found in amino acids.

c)

molecules that can replace phosphate groups from defective DNA.

d)

names of specific types of DNA molecules.

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