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Unit 2 Review

Total questions: 20

Worksheet time: 13mins

Name
Class
Date
1.

T/F: An example of carbohydrates is C6H12O6 (glucose).

a)

True

b)

False

2.

Enzymes are made up of ______.

a)

nucleotides

b)

monosaccharides

c)

fatty acids and glycerol

d)

amino acids

3.
a)
enzyme
b)
hormone
c)
receptor
d)
solvent
4.
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.
5.
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 .
6.

Letter C is the ______.

a)

active site

b)

enzyme

c)

substrate

d)

products

7.

Which enzyme works best in a basic solution?

a)

A

b)

B

8.

Which part of a water molecule has a positive charge?

a)

the hydrogen atoms

b)

the oxygen atom

c)

the carbon atom

d)

all atoms are positive

9.

Because water has a positive end and a negative end, water is a _________ molecule.

a)

mickey mouse

b)

polar

c)

ionic

d)

miracle

10.

Lipase is an enzyme that is secreted to further break down lipids into their monomers, called ____________.

a)

monosaccharides

b)

nucleotides

c)

fatty acids & glycerol

d)

amino acids

11.

Animals, such as bears, that hibernate for long periods of time use lipids to ______________.

a)

defend against pathogens

b)

store long-term energy.

c)

release quick energy.

d)

store genetic information.

12.

What type of energy do all living things use to do work?

(a)  

13.
Which sequence of complementary 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
14.
The two strands of nitrogenous bases in DNA are joined by which type of bond?
a)
polar bonds
b)
ionic bonds
c)
covalent bonds
d)
hydrogen bonds
15.
DNA codes for...
a)
bases
b)
proteins
c)
amino acids
d)
phosphates
16.

This entire molecule is called a _____

a)

nucleotide

b)

protein

c)

amino acid

d)

fatty acid

17.

The purple circle in this molecule is called a ________.

a)

lit

b)

nitrogenous base

c)

phosphate group

d)

pentose sugar

18.

T/F: Diffusion is the movement of small molecules from an area of _______ concentration to _______ without energy.

a)

high to low

b)

low to high

19.

Lactase is an enzyme that breaks up lactose into its monomers. This is an example of ________.

a)

hydrolysis

b)

dehydration synthesis

c)

molecular marriage

d)

radiation energy

20.

Which carbohydrate is found in the cell wall of fungi and the exoskeleton of insects?

a)

cellulose

b)

shatzin

c)

fructose

d)

chitin