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Worksheets

Seeds and Biological Molecules

Total questions: 20

Worksheet time: 7mins

Name
Class
Date
1.

What are the building blocks (or monomers) of carbohydrates?

a)

nucleotides

b)

monosaccharides

c)

amino Acids

d)

glycerols

2.

Which of the structures below shows a lipid?

a)
b)
c)
d)
3.

Which of the structures below shows a nucleic acid?

a)
b)
c)
d)
4.

Which of the following is a polymer of nucleic acids?

a)

triglycerides

b)

proteins

c)

DNA

d)

polysaccharides

5.
What is the primary function of PROTEINS?
a)
Source of energy
b)
Long term storage of energy
c)
Transmitting genetic information
d)
Cell processes and cell signaling
6.
The food in the image is full of which macromolecule?
a)
Carbohydrates
b)
Lipids
c)
Proteins
7.
The food in the image is full of which macromolecule?
a)
Carbohydrates
b)
Lipids
c)
Proteins
8.
Lipids are "hydrophobic" or "water fearing." What does this mean?
a)
Lipids and water do not mix.
b)
Lipids mix well with water.
9.
True or False: Nucleic acids are found in all foods.
a)
True
b)
False
10.
Carbohydrates are composed of which elements?
a)
C , H , O
b)
C , H , O , N
c)
C , H , O , N , P
d)
C , H , O , S
11.
Proteins are composed of which elements?
a)
C , H , O
b)
C , H , O , N
c)
C , H , O , N , P
d)
C , H , O , S
12.
True or False: A nucleotide, the building block of nucleic acids, is made up of a sugar, a phosphate, and a nitrogen base.
a)
True
b)
False
13.

Which biological molecule would have a positive reaction with Biuret's solution and turn purple?

a)

DNA

b)

starch

c)

amylase

d)

glucose

14.

What part of the seed provides food for the plant as it begins to grow?

a)

food store (cotyledon)

b)

embryo

c)

seed coat

15.

What are the conditions that plants need to germinate?

a)

water, warmth, air

b)

water, carbon dioxide, sunlight

c)

water, sunlight, carbon dioxide

d)

water, sunlight, air

16.

The first root to grow from a seed.

a)

epicotyl

b)

plumule

c)

cotyledon

d)

radicle

17.

What does the endosperm store for the embryo?

a)

Stores water

b)

Protects the seed from damage.

c)

Stores food for the embryo that includes proteins, carbohydrates and fats.

18.

What is the purpose of the seed coat?

a)

Provide food for the seed.

b)

Layer around the seed that protects the embryo from diseases, insects and moisture until it is time for germination.

c)

Store water for the seed.

19.

What is germination?

a)

the process of a plant growing

b)

the beginning of the growth of a plant from a seed to a seedling

c)

the process of making a seed

d)

the beginning of a plant's growth when it uses sunlight

20.

Which part of the seed will form the lower stem?

a)

plumule

b)

epicotyl

c)

hypocotyl

d)

radicle