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DNA and Enzyme Review

Total questions: 47

Worksheet time: 38mins

Name
Class
Date
1.

DNA is related to

a)

Carbohydrates

b)

Photosynthesis

c)

Cellular Respiration

d)

Genetics

2.

What do organisms have in common?

a)

DNA sequence made of A,C,T,G

b)

DNA sequence is in the same order

c)

DNA sequence between organisms have nothing in common

d)

DNA sequence made of A,U,C,T,G

3.

What is "A"?

a)

Nucleotide

b)

Deoxyribose Sugar

c)

Nitrogenous base

d)

Phosphate

4.

What is "B"?

a)

Nucleotide

b)

Deoxyribose Sugar

c)

Nitrogenous base

d)

Phosphate

5.

What is "C"?

a)

Nucleotide

b)

Deoxyribose Sugar

c)

Nitrogenous base

d)

Phosphate

6.

What is the molecule in the image?

a)

Nucleotide

b)

Deoxyribose Sugar

c)

Nitrogenous base

d)

Phosphate

7.

What is the complimentary sequence of the following sequence:

GATCAG

a)

TGACAT

b)

GACATG

c)

CTAGTC

d)

CGACTA

8.

What is bonded to Adenine in the image to form a section of the DNA molecule?

a)

Guanine and Phosphate group

b)

Cytosine and Deoxyribose sugar

c)

Thymine and Deoxyribose sugar

d)

Deoxyribose sugar and Phosphate group

9.

What determines the specific traits in an organism?

a)

The number of carbons in the DNA molecule.

b)

The number of hydrogen bonds that hold the strands of DNA together. 

c)

The sequence of nucleotide bases in the DNA molecule.

d)

The sequence of phosphates along each DNA strand. 

10.
Which of the following best describes a DNA molecule?
a)
double helix
b)
contains ribose
c)
made of amino acids
d)
contains Uracil
11.
Which sequence of DNA bases would pair with this partial strand
ATG TGA CAG
a)
ATG TGA CAG
b)
TAC ACT GTC
c)
GTA AGT GAC
d)
CAT TCA CTG
12.
Why is DNA important?
a)

it is very small and very complicated

b)

it's in everything

c)

it serves as the blueprint (instructions) for traits of all living things

d)

because we eat it every day for energy

13.
In a molecule of double-stranded DNA, the amount of Adenine present is always equal to the amount of
a)
cytosine
b)
guanine
c)
thymine
d)
uracil
14.
What sugar is in DNA?
a)
deoxyribose
b)
ribose
c)
oxyribose
d)
deoxyose
15.
Which organelle is DNA usually found in?
a)
cell membrane
b)
vacuole
c)
chloroplast
d)
nucleus
16.
Replicate the following strand of DNA: 
AATCATGGA
a)
AATCATGGA
b)
TTAGTACCT
c)
UUAGUACCU
d)
GGATAUCUA
17.
What are the three components of a nucleotide?
a)
sugar, hydrogen, nitrogen base
b)
sugar, oxygen, nitrogen base
c)
sugar, phosphate, nitrogen base
d)
sugar, phosphate, protein
18.
Watson and Crick were the first to suggest that DNA is _____
a)
a short molecule
b)
the shape of a double helix
c)
a protein molecule
d)
the genetic material
19.

Enzymes are

a)

Lipids

b)

Protein

c)

Carbohydrates

d)

Nucleic Acids

20.

Enzymes are responsible for-

a)

Speeding up reactions

b)

Giving the body energy

c)

Slowing down reactions

21.

Which of these is most likely an enzyme?  

a)

Sucrose

b)

Galactose

c)

Fructose

d)

Amylase

22.

Letter D...

a)

active site

b)

enzyme

c)

substrate

d)

products

23.

Letter B...

a)

active site

b)

enzyme

c)

substrate

d)

products

24.

Letter c...

a)

active site

b)

enzyme

c)

substrate

d)

products

25.

What is a substance called if it speeds up a chemical reaction?

a)

reusable

b)

catalyst

c)

specific

d)

fragile

26.
After the enzyme and substrate bind together and perform the reaction, what does the substrate become?
a)
a substrate
b)
an enzyme
c)
a product
d)
an active site
27.

What happens when enzymes are heated to a high temperature?

a)

The enzymes die.

b)

The shapes of the enzyme are altered denature

c)

The enzymes' amino acid sequence changes.

d)

The enzymes remain the same

28.

What are two of the functions of an enzyme? Pick two

a)

Break down molecules

b)

Build up molecules

c)

Speed up the rate of reaction

d)

Decrease the rate of reaction

29.
Enzymes are considered to be 
a)
Lipids
b)
Carbohydrate
c)
Protein
d)
Nucleic Acid
30.
What 3 letters do enzymes typically end in?
a)
-ose
b)
-ase
c)
-ese
d)
-tic
31.
Which of the following conclusions can be drawn from this graph?
a)
The optimum pH of the enzyme is 6.6.
b)
The optimum pH of the enzyme is 5.8
c)
The enzyme’s activity increases as pH increases 5.0 to 9.0
d)
The enzyme’s activity is greater around pH of 8.0 .
32.

In the diagram, what is letter A?

a)

product

b)

enzyme-substrate complex

c)

substrate

d)

active site

33.
The graph shows how enzymes affect reactions in cells. Which statement best summarizes the information shown in the graph?
a)
Enzymes increase the energy of the reactants.
b)
Enzymes decrease the energy level of the products.
c)
Enzyme decrease the activation energy of the reaction.
d)
Enzymes reverse the direction of the reaction.
34.
Enzymes speed up reaction rates by changing...
a)
Activation Energy
b)
pH
c)
Hydrogen Bonds
d)
Kinetic Energy
35.

The substance that binds to an enzyme is called a?

a)

Polypeptide

b)

Co-enzyme

c)

Vitamin

d)

Substrate

36.

Changes in pH and temperature can ___________________ an enzyme which causes it to lose its shape and affects its function.

a)

puncture

b)

denature

c)

double

d)

delete

37.

What is the optimal pH for this enzyme?

a)

6

b)

10

c)

9

d)

7

38.

The ____________________ mechanism describes how each substrate must fit into the enzyme.

a)

lock and key

b)

hammer and nail

c)

jigsaw puzzle

d)

seesaw

39.

Where do substrates bind to an enzyme?

a)

calcium channels

b)

active site

c)

receptor molecules

d)

voltage-gated channels

40.

If a DNA sequence has 40% Ts, what percent Gs must it have?

41.

If a DNA Sequence has 30% Cs, what percent As must it have?

42.

Enzymes are _______________ that _____________________ chemical reactions by ____________ the amount of activation energy required to start the reaction.

a)

carbohydrates, slow down, lowering

b)

proteins, speed up, increasing

c)

lipids, speed up, lowering

d)

proteins, speed up, lowering

43.

What is the optimal temperature of this enzyme?

a)

60

b)

40

c)

70

d)

30

44.

Quickly available energy is the function of which biomolecule

a)

Carbohydrates

b)

Nucleic Acid

c)

Protein

d)

Lipid

45.

One of the monomers of lipids is fatty acids. What is the other

a)

Nucleotides

b)

Glycerol

c)

Deoxyribose

d)

Thymine

46.

True or False: Not all living things are composed of genetic material (DNA)

a)

True

b)

False

47.

The nitrogenous base Guanine pairs with Cytosine. The nitrogenous base Adenine pairs with

a)

Thymine

b)

Amino Acids

c)

Deoxyriobse

d)

Phosphate

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