Free Printable Biomolecules / Chemical Reactions

1.

main source of energy

a)

proteins

b)

carbohydrates

c)

DNA and RNA

d)

lipids

2.

DNA : nucleotides :: carbohydrates : _____

a)

simple sugars

b)

amino acids

c)

fatty acids

3.

Carbohydrates contain C, H, O, N, and S.

a)

True

b)

False

4.

The human body can only make 11 amino acids. These are the essential amino acids.

a)

True

b)

False

5.

glucose + fructose

a)

maltose

b)

sucrose

c)

lactose

6.

complex carbohydrate

a)

glucose

b)

deoxyribose

c)

starch

7.

oils, hormones, waxes

a)

proteins

b)

carbohydrates

c)

nucleic acids

d)

lipids

8.

found in the cell wall of plants

a)

starch

b)

cellulose

9.

nucleic acid that is used to make protein

a)

DNA

b)

RNA

10.

Butter is a source of saturated fats.

a)

True

b)

False

11.

Phospholipids make up the cell _____.

a)

wall

b)

membrane

12.

dissolving milk in water

a)

physical change

b)

chemical change

13.

boiling water

a)

physical change

b)

chemical change

14.

element

a)

$CO_2$

b)

$Mg\ \left(OH\right)_2$

c)

$Br_2$

d)

$HCl$

15.

How many atoms of Mg are in $Mg\left(OH\right)_2$ ?

a)

1

b)

2

c)

none

16.

$CH_4\ +\ 2\ O_2\ \rightarrow\ CO_2\ +\ 2\ H_2O$

What are the reactants?

a)

$CO_2$

b)

$O_2$

c)

$CH_4$

d)

$H_2O$

17.

$CH_4\ +\ 2\ O_2\ \rightarrow\ CO_2\ +\ 2\ H_2O$

How many particles of oxygen gas ( $O_2$ ) are there?

a)

1

b)

2

c)

3

d)

4

18.

$CH_4\ +\ 2\ O_2\ \rightarrow\ CO_2\ +\ 2\ H_2O$

How many hydrogen atoms are there?

a)

1

b)

2

c)

3

d)

4

19.

$KOH\ +\ HBr\ \rightarrow\ KBr\ +\ H_2O$

a)

balanced

b)

unbalanced

20.

$3\ H_2\ +\ N_2\ \rightarrow\ 2\ NH_3$

a)

synthesis

b)

decomposition

c)

replacement

d)

combustion

21.

$CH_4\ +\ O_2\ \rightarrow\ CO_2\ +\ 2\ H_2O$

a)

synthesis

b)

decomposition

c)

replacement

d)

combustion

22.

E absorbed < E released

a)

endothermic

b)

exothermic

23.

Cooking is an endothermic reaction.

a)

True

b)

False

24.

Endothermic reactions require more activation energy than exothermic reactions.

a)

True

b)

False

25.

substance that increases reaction rate by lowering the activation energy of a chemical reaction

a)

inhibitor

b)

catalyst

Biomolecules / Chemical Reactions

Total questions: 25

Worksheet time: 15mins

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