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Biochemistry Unit Review

Total questions: 50

Worksheet time: 1hrs 1mins

Name
Class
Date
1.

The 4 types of carbon-based molecules are lipids, proteins, nucleic acids, and:

a)

Polymers

b)

Carbohydrates

c)

Amino acids

d)

Sugars

2.

Which are properties of water? (Check all that apply)

a)

High heat capacity

b)

Cohesion

c)

Polar

d)

Adhesion

3.

Organic compounds always contain...

(a)  

4.

Protein's monomer is...

a)

Amino acid

b)

Lipid

c)

Nucleotide

d)

Sugar

5.

Nucleotides are the _______ to the _______ DNA.

a)

polymer / monomer

b)

monomer / polymer

6.

What is B picturing?

a)

Product

b)

Enzyme

c)

Substrate

d)

Active Site

7.

Which 3 elements does every carbon-based molecule contain? (Select all that apply)

a)

Hydrogen

b)

Nitrogen

c)

Carbon

d)

Oxygen

8.

Enzyme rates can be affected by...

a)

pH

b)

temperature

c)

enzyme structure

d)

all of the above

9.

The middle, blue arrow is showing...

a)

Adhesion

b)

Cohesion

c)

Solvent capability

d)

Ionic bonding

10.
What elements make up carbohydrates?
a)
Carbon, hydrogen, nitrogen, oxygen
b)
sulfur, carbon, hydrogen
c)
glucose and fructose
d)
carbon, hydrogen, oxygen
11.
All carbohydrate names end with which ending:
a)
ise
b)
ase
c)
ese
d)
ose
12.
The monomer, building block, of carbohydrates; simple sugar
a)
Amino acid
b)
Fatty Acid
c)
Nucleotide
d)
Monosaccharide
13.
The above diagram represents
a)
A monosaccharide
b)
A monomer of a carbohydrate
c)
A sugar
d)
All of the above
14.
What type of Biological molecules is this?
a)
Carbohydrate
b)
Protein
c)
Lipid
d)
Nucleic Acid
15.
Build and repair body structures
a)
carbohydrate
b)
protein
c)
lipid
d)
nucleic acid
16.
Organic compounds that include fats, oils and waxes.
a)
Amino acids
b)
Lipid
c)
Oils
d)
Fats
17.
Proteins catalyst that speeds up the rate of chemical reactions.
a)
Synthesis
b)
Proteins
c)
Enzyme
d)
Carbohydrates
18.

Define atoms

a)

A positively charged particle

b)

the smallest particleof an element that keep theproperties of the element

c)

A neutral particle.

d)

A negatively charged Particle

19.

What is the charge of a proton?

a)

Positively charged particle (+)

b)

Negatively charged particle (-)

c)

Neutrally charged particle (0)

20.

What is the charge of a neutron?

a)

Postively charged particle

b)

Negatively charged particle

c)

Neutrally charged particle

d)

Extra charged Particle

21.

What is the charge of an electron?

a)

Postively charged particle

b)

Negatively charged particle

c)

Neutrally charged particle

d)

No charged

22.
How many Neutrons are in one atom of Lithium?
a)
6.941
b)
7
c)
3
d)
4
23.
How many Protons are in one atom of Lithium?
a)
3
b)
6
c)
7
d)
6.941
24.
How many Electrons are in one atom of Lithium?
a)
3
b)
6
c)
7
d)
6.941
25.
How many atoms of Oxygen are in this compound?
a)
1
b)
2
c)
3
d)
4
26.

Carbon can form _____ bonds with other elements.

a)

1

b)

2

c)

3

d)

4

27.

Carbon forms ________ bonds with other atoms by sharing electrons with the other elements.

a)

ionic

b)

covalent

c)

hydrogen

d)

peptide

28.

Macromolecules are made of repeating subunits called

a)

monomers

b)

monosaccharides

c)

polymers

d)

polysaccharides

29.

A _________ reaction removes a molecule of water to bond molecules together to create a polymer.

a)

hydrolysis

b)

water

c)

dehydration synthesis

d)

magical

30.

In order to break apart a polymer ________ must be added.

a)

carbon

b)

water

c)

oxygen

d)

hydrogen

31.

What type of reaction is shown?

a)

Dehydration synthesis

b)

Hydrolysis

32.

Which type of reaction is shown?

a)

Dehydration Synthesis

b)

Hydrolysis

33.

What type of bond is found BETWEEN water molecules?

a)

Hydrogen bonds

b)

Ionic bonds

c)

Nonpolar covalent bonds

d)

Polar covalent bonds

34.

Surface tension of water is the cohesive force between water molecules and other molecules.

a)

True

b)

False

35.

What word describes when water is attracted to other substances?

a)

Cohesion

b)

Adhesion

c)

Capillary action

d)

Surface tension

36.

The fact that ice floats on liquid water is due to the fact that water's solid form is _____________ than its liquid form.

a)

Less polar

b)

More polar

c)

Less dense

d)

More dense

37.

Large bodies of water help to keep nearby climates from being too hot or too cold because they

a)

Absorb heat in the spring and slowly release that heat in the fall

b)

Absorb heat in the fall and slowly release that heat in the spring

c)

Absorb heat in the summer and slowly release that heat in the winter

d)

Absorb heat in the winter and slowly release that heat in the summer

38.
molecule in which opposite ends have opposite electric charges
a)
cohesion
b)
polar molecule
c)
hydrogen bond
d)
solution
39.
Water molecules require a lot of energy to separate one from the others.  This gives water a high
a)
density
b)
polarity
c)
solvency
d)
specific heat
40.
Water molecules require a lot of energy to separate one from the others.  This gives water a high
a)
density
b)
polarity
c)
solvency
d)
specific heat
41.
A(n) _____________ variable depends on or is changed by another variable.
a)
dependent
b)
independent
42.

Sarah is bringing treats to her elementary school class on her birthday. The number of treats she brings in is based on the number of students in her class.


t = the number of treats

s = the number of students


Which of the variables is INDEPENDENT?

a)

s

b)

t

43.

If I drink a lot of water then I will have to go to the bathroom.

What is the red part?

a)

independent variable

b)

dependent variable

44.
Research question: does the distance a person kicks a soccer ball effect how well they will do on their math test.  What is the dependent variable?
a)
How far they kick the soccer ball
b)
who the person is
c)
how well they do on the math test
d)
Type of soccer ball.
45.

What is the purpose of having a control group in an experiment?

a)

To compare the results with the experimental groups

b)

To ensure all participants listen to music

c)

To make the experiment more complicated

d)

To focus only on the control group results

46.

True of False:

Variable are kept constant in an experiment so only the independent variable can be tested.

a)

True

b)

False

47.

The one variable in an experiment that is purposely changed by the scientist is the________________.

a)

dependent variable

b)

independent variable

c)

data

d)

control group

48.

What is the primary purpose of formulating a hypothesis in the scientific method?

a)

To ensure the experiment is conducted safely

b)

To provide a detailed procedure for the experiment

c)

To make a prediction that can be tested through experimentation

d)

To analyze the data collected from the experiment

49.

Which characteristic of water molecules directly contributes to the remarkable "water walking" success of the aquatic insects pictured?

a)

hydrogen bonds

b)

capillary action

c)

nonpolar covalent bonds

d)

ionic bonds

50.

Water is a polar molecule. What is the slight charge of hydrogen (H) and the oxygen (O)?

a)

Hydrogen (+)

Oxygen (-)

b)

Hydrogen (-)

Oxygen (+)

c)

Hydrogen (-)

Oxygen (-)

d)

Hydrogen (+)

Oxygen (+)

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