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Biology Midterm Exam

Total questions: 56

Worksheet time: 2hrs 45mins

Name
Class
Date
1.

The one factor that a scientist changes during an experiment.

a)

Controlled Variable

b)

Dependent Variable

c)

Independent Variable

2.

The variable that is measured.

a)

Controlled Variable

b)

Dependent Variable

c)

Independent Variable

3.

The factors that stay the same or are constant throughout the experiment.

a)

Controlled Variable

b)

Dependent Variable

c)

Independent Variable

4.

Ben makes five paper helicopters with different wing lengths. He drops them the same way from a height of two meters for five trials each. He records the amount of time it takes for each helicopter to fall to the ground.

What is the independent variable?

a)

Dropping the same way

b)

Wing Length

c)

Amount of time it takes the helicopter to hit the floor

d)

Dropping from the same height

5.

Ben makes five paper helicopters with different wing lengths. He drops them the same way from a height of two meters for five trials each. He records the amount of time it takes for each helicopter to fall to the ground.

What is the dependent variable?

a)

Dropping the same way

b)

Wing Length

c)

Amount of time it takes the helicopter to hit the floor

d)

Dropping from the same height

6.

Cells grow, carry out normal functions, and copy their organelles.

a)

G1

b)

S

c)

G2

d)

M phase

7.

Cells go through additional growth.

a)

G1

b)

S

c)

G2

d)

M phase

8.

Cells undergo cell division, which involves both mitosis and cytokinesis.

a)

G1

b)

S

c)

G2

d)

M phase

9.

Cells replicate DNA.

a)

G1

b)

S

c)

G2

d)

M phase

10.

What two processes make up the M stage?

a)

fermentation & mitosis

b)

mitosis & cytokinesis

c)

glycolysis & cytokinesis

d)

G1 & G2

11.

Where does DNA synthesis happen in eukaryotic cells?

a)

cytoplasm

b)

mitochondria

c)

nucleus

d)

Golgi apparatus

12.

programmed cell death = _____

a)

apoptosis

b)

cancer

c)

spindle

d)

cytokinesis

13.

uncontrolled cell growth = _____

a)

apoptosis

b)

cancer

c)

spindle

d)

cytokinesis

14.
What is the function of the vacuole?
a)
Sac that stores water, nutrients, and waste products
b)
Sac filled with digestive chemicals
c)
Jelly-like substance within the plasma membrane
d)
stack of membranes that packages chemicals
15.
I make proteins for the cell. What am I?
a)
ribosome
b)
mitochondria
c)
chloroplast
d)
lysosome
16.
The two kinds of cells are Prokaryotes and Eukaryotes. How are they different?
a)
Prokaryotes have a nucleus.
b)
Eukaryotes have a nucleus.
c)
Prokaryotes are plant cells.
d)
There is no difference.
17.
This organelle takes food and turns it into ENERGY for plant and animal cells.
a)
Chloroplast
b)
Mitochondria
c)
Lysosome
d)
Ribosome
18.

storage area for the cell

a)

vacuole

b)

cytoplasm

c)

chloroplast

d)

cell wall

19.

command center, direct's the cell's activities

a)

nucleus

b)

lysosome

c)

mitochondria

d)

endoplasmic reticulum

20.
I am the outer most layer of an animal cell.
a)
cell wall
b)
nucleus
c)
cell membrane
d)
cell skin
21.

This organelle is responsible for structure and support of the cell. It can also assist with transportation.

a)

Endoplasmic reticulum

b)

Cytoskeleton

c)

Lysozome

d)

Mitochondria

e)

Nucleolus

22.
I am single stranded.
a)
DNA
b)
RNA
c)
Both DNA and RNA
23.
I am a nucleic acid.
a)
DNA
b)
RNA
c)
Both DNA and RNA
24.
I am arranged as a double helix or "twisted ladder."
a)
Both DNA and RNA
b)
DNA
c)
RNA
25.
I have the sugar ribose.
a)
RNA
b)
DNA
c)
Both DNA and RNA
26.
I have the sugar deoxyribose.
a)
RNA
b)
DNA
c)
Both DNA and RNA
27.
I include the bases guanine, cytosine, and adenine.
a)
DNA
b)
RNA
c)
Both DNA and RNA
28.
I have the base thymine.
a)
Both DNA and RNA
b)
RNA
c)
DNA
29.
Which sequence of DNA bases would pair with this partial strand
ATG TGA CAG
a)
ATG TGA CAG
b)
TAC ACT GTC
c)
GTA AGT GAC
d)
CAT TCA CTG
30.
Why is DNA important?
a)
it is very small and very complicated
b)
it's in everything
c)
it serves as the blueprint for traits of all living things
d)
because we eat it every day for energy
31.
What are the three components of a nucleotide?
a)
sugar, hydrogen, nitrogen base
b)
sugar, oxygen, nitrogen base
c)
sugar, phosphate, nitrogen base
d)
sugar, phosphate, protein
32.
A process in which DNA has the unique ability to make an exact copy of itself.
a)
Replication
b)
Translation
c)
Transcription
33.
The following picture must be
a)
DNA because it's double stranded
b)
RNA because it's single stranded
c)
DNA because it's single stranded
d)
RNA because it's double stranded
34.

What is the job of ribosomes?

a)

make proteins

b)

store energy

c)

create covalent bonds

d)

create hydrogen bonds

35.
the process of making a copy of DNA
a)
transcription
b)
double helix
c)
DNA replication
d)
replication fork
36.
What amino acid is represented by the codon UUA?
a)
Phenylalanine
b)
Tyrosine
c)
Leucine
d)
Stop codon
37.

When DNA is replicated, the result is

a)

1 old double helix and 1 new

b)

2 double helixes. Each with 1 old and 1 new strand

c)

1 double helix

d)

2 new double helixes

38.

Replicate this strand:

ACCGGATT

a)

TCCGGATT

b)

AGGCCTAA

c)

TGGCCTAA

d)

CCGGAATT

39.

What is the order for Protein Synthesis?

a)

Transcription -> Translation -> Protein

b)

Translation - > Transcription -> Protein

c)

Protein -> Transcription -> Translation

d)

Translation -> Protein -> Transcription

40.
What amino acid is represented by the codon UUA?
a)
Phenylalanine
b)
Tyrosine
c)
Leucine
d)
Stop codon
41.

What is the correct amino acid sequence for the mRNA code AUGCCAGUAUGA

a)

Met-Pro-Ala-Val

b)

Met-Pro-Val

c)

Tyr-Gly-His

d)

Tyr-Gly-Arg-His

42.

Mutation

a)

a DNA segment in a chromosome that is a copy of another segment

b)

the loss or excision of a section of genetic code, or its product

c)

the set of observable characteristics of an individual

d)

the changing of the structure of a gene, resulting in a variant form

43.
What phase of mitosis is occuring in the picture?
a)
Prophase
b)
Metaphase
c)
Cytokinesis
d)
Telophase
44.
What is the first phase of Mitosis?
a)
Prophase
b)
Metaphase
c)
Anaphase
d)
Telophase
45.
In which phase does the cell spend most of it's life?
a)
Interphase
b)
Nuclear Division
c)
Telophase
d)
Mitosis
46.
The result of meiosis is:
a)
two diploid cells
b)
two haploid cells
c)
four diploid cells
d)
four haploid cells
47.
The chromosomes that pair up during meiosis, are called __________ chromosomes.  
a)
homozygous 
b)
asexual
c)
homologous
d)
genes
48.
A human zygote should have _____ chromosomes inside.
a)
46
b)
23
c)
92
d)
64
49.
Why would it be important to replicate DNA before a cell divides in mitosis or meiosis?
a)
In order for genetic information to be transferred into daughter cells.
b)
In order for the cell to be able to increase in size.
c)
In order for the DNA to be contained in the nucleus.
d)
In order for the cell to re-order the DNA sequencing in the new cells.
50.
Put the following stages of mitosis in order: anaphase, prophase, metaphase, and telophase. 
a)
prophase, metaphase, telophase, anaphase
b)
prophase, anaphase, metaphase, telophase
c)
prophase, metaphase, anaphase, telophase
d)
prophase, telophase, metaphase, anaphase
51.
In which type of cells will mitosis occur?
a)
egg cells
b)
sperm cells
c)
jail cells
d)
Body cells except the sperm and egg cells
52.

Which of the following is an example of positive feedback?

a)

Thermoregulation

b)

Blood Pressure

c)

Childbirth

d)

Blood Sugar Levels

53.
Homeostasis
a)
allows for a wildly fluctuating internal environment
b)
is impossible in vertebrates
c)
is the maintenance of a relatively stable internal environment and often incorporates a form of feedback regulation
d)
is the maintenance of a relatively stable external environment and often incorporates a form of feedback regulation
54.
When you get cut, your skin cells release hormones that signal platelets to come and stop the bleeding. Platelets then release more hormones that signal even more platelets to help stop bleeding. The hormone signals continue until the cut is closed.
a)
Positive Feedback Response
b)
Negative Feedback Loop 
55.
Negative Feedback Loops:
a)
amplify processes
b)
prevent small changes from getting larger
c)
are initiated during childbirth
d)
are found only in plants
56.
Name the levels of organization in the human body in order from smallest to largest:
a)
Tissue, organ, organ system
b)
Organ system, tissue, organs, cells
c)
Cells, tissue, organs, organ system
d)
Cells , organs, tissue, organ system

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