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Biochemistry U2 Review

Total questions: 45

Worksheet time: 25mins

Name
Class
Date
1.

Based on the graph, what temperature does this enzyme work best?

a)

15 C

b)

40 C

c)

30 C

d)

50 C

2.
Which of the following binds to the active site of an enzyme? 
a)
substrate
b)
product
c)
codon
d)
none of the above
3.

What happens when enzymes are heated to a very high temperature?

a)

The enzymes die.

b)

The shapes of the enzyme are altered or denatured

c)

The enzymes' amino acid sequence changes.

d)

The enzymes remain the same

4.
Enzymes are
a)
nucleic acids
b)
proteins
c)
lipids
d)
carbohydrates
5.

Carbohydrates are more easily metabolized than lipids. However, lipids provide cells with more _______ per gram.

a)

nitrogen

b)

proteins

c)

structure

d)

energy

6.
Proteins are made of monomers called ___________
a)
Nucleotides
b)
Monosaccharides
c)
Amino Acids
d)
Glycerol and fatty acids
7.
Nucleotides are monomers of
a)
Carbohydrates
b)
Lipids
c)
Proteins
d)
Nucleic Acids
8.
Monosaccharides are monomers of
a)
Carbohydrates
b)
Lipids
c)
Proteins
d)
Nucleic Acids
9.
Waxes, oils and fats are examples of
a)
Carbohydrates
b)
Lipids
c)
Proteins
d)
Nucleic Acids
10.
What is the function of nucleic acids?
a)
store genetic information
b)
store energy (long-term)
c)
store energy (short-term)
d)
build skin, hair, nails, muscles
11.
Which of the following organic compounds is the main source of energy for living things?
a)
carbohydrates
b)
lipids
c)
nucleic acids
d)
proteins
12.
Which macromolecule stores energy, insulates us, and makes up the cell membrane?
a)
lipids
b)
proteins
c)
carbohydrates
d)
nucleic acids
13.
All polymers are made up of...
a)
monosaccharides
b)
monomers
c)
proteins
d)
None of these
14.
All organic compounds contain the element
a)
carbon
b)
nitrogen
c)
phosphorus
d)
sulfur
15.

Enzymes belong to which class of macromolecules?

a)

lipids

b)

carbohydrates

c)

proteins

d)

nucleic acids

16.

Sugar belongs to which class of macromolecules?

a)

proteins

b)

lipids

c)

nucleic acids

d)

carbohydrates

17.
Which macromolecule contains Carbon, Hydrogen, and Oxygen in a 1:2:1 ratio?
a)
Carbohydrates
b)
Lipids
c)
Nucleic Acids
d)
Proteins
18.
Which macromolecule is made of a triglyceride (3 fatty acids and 1 glycerol)?
a)
Carbohydrates
b)
Lipids
c)
Nucleic Acids
d)
Proteins
19.

Which macromolecule is found in grains, starches, and vegetables?

a)

Polysaccharides

b)

Lipids

c)

Monosaccharides

d)

Proteins

20.
Emmy has just gotten her blood work back from her doctor and she has high cholesterol. Which macromolecule must she reduce in her diet?
a)
Carbohydrates
b)
Lipids
c)
Nucleic Acids
d)
Proteins
21.

Butter, lard and vegetable oil are examples of what macromolecule?

a)

Protein

b)

Nucleic acid

c)

Lipid

d)

Carbohydrate

22.

Table sugar, honey, and fruit juice are examples of what macromolecules?

a)

Polysaccharides

b)

Simple carbohydrates

c)

Lipid

d)

Protein

23.

Almonds, chicken, and beef are foods that are high in what macromolecule?

a)

Lipid

b)

Nucleic acid

c)

Carbohydrate

d)

Protein

24.

What is the primary function of carbohydrates in your body?

a)

Speed up chemical reactions.

b)

Give quick energy.

c)

Help to store energy.

d)

Build cell walls in plants.

25.

How many servings are in this container?

a)

1

b)

8

c)

2/3

d)

55

26.
What is the number of protons that the element in this image contain?
a)
14
b)
7
c)
15
d)
18
27.
What does the nucleus of an atom contain?
a)
Electrons and neutrons
b)
Protons and neutrons
c)
Neutrinos and positrons
d)
Electrons and megatrons
28.
How many protons, electrons and neutrons does an neutral atom of Calcium have?  Its atomic number is 20 and the mass number is 40.
a)
20 protons, 18 electrons and 40 neutrons
b)
20 protons, 20 electrons and 20 neutrons
c)
40 protons, 40 electrons and 20 neutrons
d)
20 protons, 18 electrons and 20 neutrons
29.

What is the chemical symbol for the element Sodium?

(Also know the others in Part 1 notes!)

a)

So

b)

Na

c)

NA

d)

S

30.

A calorie is officially defined as the amount of energy it takes to raise the _______ of 1 gram of water by 1 degree

Celsius,

a)

temperature

b)

volume

c)

mass

d)

elevation

31.

An atom with 14 protons and 17 electrons will have a net charge of:

a)

-3

b)

+3

c)

+14

d)

-17

32.

Which of these is an example of an ELEMENT?

a)

Sodium hydroxide

b)

catalase

c)

HCl

d)

Na

33.

One molecule of glucose (C6H12O6) includes a combined total of ____ atoms.

a)

12

b)

6

c)

24

d)

18

34.

What includes the protons and the neutrons?

a)

Atomic number

b)

Atomic mass

c)

Ionic charge

d)

Atomic wedgie

35.

Which element makes a compound "organic" and can make up to 4 bonds?

a)

Carbon

b)

Calcium

c)

Oxygen

d)

Hydrogen

36.

Which of these is NOT a property of water?

a)

Has a high heat capacity

b)

Contracts as it freezes

c)

Adhesion and cohesion

d)

A good solvent

37.

If a solution has a pH of 2, what is it?

a)

Acidic

b)

Basic

c)

Buffer

d)

Neutral

38.

Which of these is a polymer?

a)

Monosaccharide

b)

Polysaccharide

c)

Nucleotide

d)

Nucleic Acid

39.

Hair, nail, muscle, blood, and skin cells all have high levels of...

a)

Protein

b)

Lipids

c)

Polysaccharides

d)

Monosaccharides

40.

Which of these would NOT be a carb?

a)

FructOSE

b)

LactASE

c)

GalactOSE

d)

SucrOSE

41.

Which shows a positive test for polysaccharides?

a)

Iodine turns dark blue

b)

Biuret solution turns purple

c)

Benedicts solution turns orange

d)

Sudan III turns red

42.

Which shows a positive test for monosaccharides?

a)

Iodine turns dark blue

b)

Biuret solution turns purple

c)

Benedicts solution turns orange

d)

Sudan III turns red

43.

Which type of fats are healthier for you to eat?

a)

Saturated fats

b)

Unsaturated fats

c)

Hydrogenated or trans fats

d)

Ones that are solid at room temperature

44.

The average person's diet should include about...

a)

1000 Cal (more if active, less if trying to lose weight)

b)

2000 Cal (more if active, less if trying to lose weight)

c)

1000 Cal (less if active, more if trying to lose weight)

d)

2000 Cal (less if active, more if trying to lose weight)

45.

Chemically breaking down food into smaller molecules that the body can absorb & use is called...

a)

digestion

b)

homeostasis

c)

evolution

d)

synthesis

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