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Biochemistry quiz1

Total questions: 20

Worksheet time: 10mins

Name
Class
Date
1.

Nonpolar R groups in amino acids can not form hydrogen bonds with water and are pushed into the _______ of a protein.

a)

middle

b)

outside touching water

c)

Bond with water

d)

disappear

2.

What Elements are found in DNA

a)

CHO

b)

CHON

c)

CHONP

d)

CHONPS

3.

What happens during cohesion?

a)

Oxygen of on atom is attracted to hydrogen of another atom so water becomes attracted to itself

b)

no attaction

c)

water is attracted to other things

d)

hydrogen atoms of one atom are attracted to hydrogen atoms of another atom so water is attracted to itself

4.

Peptides bonds are formed between the

a)

NH2 and COOH

b)

C and C

c)

CH3 and H20

d)

C=0 and C

5.

If a macromolecule has sulfur and nitrogen in it, it is classified as a ____________

a)

carbohydrate

b)

protein

c)

lipid

d)

nucleic acid

6.

Which element is found in organic compounds?

a)

oxygen

b)

carbon

c)

nitrogen

d)

sulfur

7.

All of waters properites are derived form its _________ bonds

a)

hydrogen

b)

carbon

c)

nonpolar

d)

oxygen

8.

High heat of vaporization helps produce a cooling mechanism that helps remove excess heat through phase change form liquid to __________________

a)

solid

b)

liquid

c)

gas

d)

plasma

9.

Water moves up plants. Water and the xylem are both polar. Water has the ability to make ______ bonds with itelf and inside walls of the xylem and move up the vascular tissue of a plant.

a)

hydrogen

b)

carbon

c)

oxygen

d)

nonpolar

10.

UV radiation can damage the weak bonds the hold DNA double helix together. It breaks the ___________ bonds between the nitrogenous bases.

a)

carbon

b)

oxygen

c)

nitrogen

d)

hydrogen

11.

Genetic code is carried by

a)

carbohydrates

b)

proteins

c)

lipids

d)

nucleic acid

12.

Guanine Cytosine (G C) bonds in DNA denature at higher temperatures because they have 3 hydrogen bonds and thereform have more hydrogen bonds between them than adenine and ____________

a)

thymine

b)

guanine

c)

adenine

d)

uracil

13.

Secondary structure of a protein includes ____ and beta pleated sheets.

a)

bonds

b)

amino acid chains

c)

alpha helix

d)

globular proteins

14.

What sugar is found in DNA? hint its name comes from this sugar

a)

ribose

b)

deoxyribose

c)

glucose

d)

sucrose

15.

What sugar is found in RNA?

a)

deoxyribose

b)

gluscose

c)

cellulose

d)

ribose

16.

RNA differs from DNA because of a different identity of nitrogen base called_________

a)

uracil

b)

adenine

c)

thymine

d)

guanine

17.

Is there thymine in RNA?

a)

yes

b)

no

c)

sometimes

d)

cant be determined

18.

In proteins the bond between C-N is formed through dehydration synthesis. What 2 things are formed through this process?

a)

peptide bonds, H2O

b)

glycosidic bonds, carbons

c)

ester bonds, H2O

d)

phosphodiester bonds, H2O

19.

Peptide bonds form between C-N during dehydration synthesis. Also water is formed. What kind of bonds are peptide bonds?

a)

covalent

b)

Ionic

c)

hydrogen

d)

double

20.

When you make proteins or carbohydrates you remove water through dehydration synthesis so __ is made a byproduct.

a)

water

b)

oil

c)

triglycerides

d)

nucleotides