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Unit 2.1 Biology

Total questions: 20

Worksheet time: 10mins

Name
Class
Date
1.

What molecules are in nucleotides?

a)

Phosphate group

b)

Protein

c)

Sugar

d)

lipid

e)

Nitrogenous base

2.

Why are the nucleotides so gosh darn important? (Careful, all statements are true! Make sure you are picking what makes them IMPORTANT!!!!)

a)

They hold the DNA together.

b)

They live in the nucleus.

c)

This is the chemical part that has the information for life.

d)

There are 5 different kinds.

3.

Thymine will bond with...

a)

Guanine

b)

Cytosine

c)

Adenine

d)

Uracil

4.

Adenine can bond with... (CAREFUL!!!)

a)

Guanine

b)

Cytosine

c)

Thymine

d)

Uracil

5.

Guanine will bond with...

a)

Thymine

b)

Cytosine

c)

Adenine

d)

Uracil

6.

Which bases are only found in DNA?

a)

Thymine

b)

Cytosine

c)

Adenine

d)

Uracil

e)

Guanine

7.

How many parts make up a nucleotide?

a)

One

b)

Two

c)

Three

d)

Four

8.

What is the shape of DNA?

a)

anti-parallel double helix

b)

single helix

c)

squiggle

d)

twisty step looking thing

e)

triple helix

9.
What are the nucleotides made of?
a)
Sugar, Phosphate, nitrogen base
b)
Phosphate, Adenine, nitrogen base
c)
Thymine, Adenine, Cytomine
d)
Phosphate, Nitrogen, Adenine
10.

Which sequence of DNA bases would pair with this partial strand
ATG TGA

a)

ATG TGA

b)

TAC ACT

c)

GTA AGT

d)

CAT TCA

11.

Which organelle of a eukaryotic cell is DNA usually found in?

a)
cell membrane
b)
vacuole
c)
chloroplast
d)
nucleus
12.

Which 2 molecules form the sides (backbone) of the DNA ladder?

a)
deoxyribose and adenine
b)
deoxyribose and a hydrogen bond
c)
sugar and the nucleus
d)
deoxyribose (sugar) and phosphate
e)

nucleotide base and phosphate

13.
The two strands of nitrogenous bases in DNA are joined by which type of bond?
a)
polar bonds
b)
ionic bonds
c)
covalent bonds
d)
hydrogen bonds
14.
Identify #2.
a)
nitrogen base
b)
phosphate group
c)
deoxyribose sugar
d)
nucleotide
15.
What determines the code, or information, of a DNA molecule?
a)
the shape (structure) of the nitrogen bases
b)
the order (sequence) of the nitrogen bases
c)
the color of the nitrogen bases
d)
the frequency (number) of nitrogen bases
16.
This picture is illustrating the ____ nature of DNA.
a)
anti-parallel
b)
deoxyribosic
c)
helical
d)
radioactive
17.
If we think of DNA as a ladder, which parts are the steps of the ladder?
a)
the nitrogenous base pairs
b)
the phosphate-sugar backbone
c)
the genes
d)
the phospholipid bilayer
e)

I have no idea....

18.
If we think of DNA as a ladder, which parts are the sides of the ladder?
a)
the nitrogenous base pairs
b)
the phosphate-sugar backbone
c)
the genes
d)
the phospholipid bilayer
19.
What does DNA do?
a)

It carries genetic information from parents to offspring.

b)

It carries oxygen from the lungs to the body.

c)

It tells you who you are.

d)

It defines the organism.

e)

Creates everthing in our universe

20.

Which of the following statements about chromosomes is correct?

a)

Chromosomes are long, thread-like structures

b)

Chromosomes are found in the nucleus of all cells in the human body

c)

Chromosomes contain DNA

d)

All of the above

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