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Molecule of Life (Lect Exercise)

Total questions: 20

Worksheet time: 11mins

Name
Class
Date
1.
What two elements make up water?
a)
Helium and oxygen
b)
Hydrogen and oxygen
c)
helium and carbon
d)
oxygen and carbon
2.
Attractions between water molecules are called
a)
Covalent bonds
b)
Ionic bonds
c)
Polar bonds
d)
Hydrogen bonds
3.
A water strider can skate along the top of a pond because:
a)
covalent bonds result in water cohesion
b)
hydrogen bonds result in water cohesion (surface tension)
c)
water striders have adapted to take advantage of water cohesion
d)
low surface tension of water
4.
What molecule is this
a)
sucrose
b)
protein
c)
glucose
d)
cellulose
5.
What elements make up carbohydrates?
a)
Carbon, hydrogen, nitrogen, oxygen
b)
sulfur, carbon, hydrogen
c)
glucose and fructose
d)
carbon, hydrogen, oxygen
6.

Which of these bonds are found in chain of carbohydrates?

a)

Glycosidic Bonds

b)

Phophodiester Bonds

c)

Peptide Bonds

d)

Hydrogen Bonds

7.

Functions of carbohydrates include:

a)

waterproof covering and insulation

b)

main energy source; structural component of cell wall

c)

structural componentof cell wall

d)

protect organs and store energy

8.

What is the main function of Protein?

a)

For growth and repair of body cells

b)

Acts as an energy giving nutrient

c)

To keep the body warm

d)

Protect internal organs

9.
What is the NH2 (nitrogen-containing) group on this amino acid called?
a)
amino group
b)
R group
c)
carboxyl group
10.
How many different amino acids are there?
a)
15
b)
20
c)
25
d)
30
11.
What type of lipid is this?
a)
steroid
b)
cholesterol
c)
phospholipid
d)
triglyceride
12.
Lipids do not dissolve in water because they are _______________
a)
polar
b)
water soluble
c)
non-polar
13.

Lipids are made up of carbon, hydrogen and ___________.

a)

Chlorine

b)

Nitrogen

c)

Oxygen

d)

Helium

14.

Identify this structure

a)

Glycerol

b)

Ethanol

c)

Methanol

d)

Cholesterol

15.
What is the monomer of nucleic acids?
a)
Glycerol
b)
Monosaccharides
c)
Amino Acids
d)
Nucleotides
16.

The sugar that is in the backbone of DNA is called

a)

fructose

b)

ribose

c)

glucose

d)

deoxyribose

17.
Which of the following elements does a Nucleic Acid have that a Carbohydrate and Lipid do not?
a)
Carbon
b)
Oxygen
c)
Hydrogen
d)
Nitrogen
18.
If one series of bases reads: TTGACTAGG, then the complementary set of bases would read:
a)
TTGACTAGG
b)
AACTGATCC
c)
AATCGAACTT
d)
AAGTCATCC
19.
The backbone of DNA is made up of _______ & ________ units. 
a)
sugar & base
b)
sugar & phosphate
c)
base & phosphate
d)
phosphate & phosphate
20.

Nitrogen bases for RNA:

a)

Adenine, Guanine, Cytosine, and Uracil

b)

Adenine Guanine, Cytosine, and Sulfur

c)

Adenine, Guanine, Cytosine, and Thymine

d)

Adenine, Guanine, Cytosine, and Phosphate

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