Free Printable Biology Unit 1 Test Review

1.

Which of the following statements about a controlled experiment is true?

a)

all variables must be kept the same

b)

only one variable is tested at a time

c)

scientists always use controlled experiments

d)

controlled experiments cannot be performed on living things

2.

in a controlled experiment, the __________ is the cause, and the _______________ is the effect.

a)

independent variable; dependent variable

b)

dependent variable; independent variable

c)

hypothesis; theory

d)

theory; hypothesis

3.

Martha was baking bread and noticed that her yeast was creating bubbles when mixed with warm water. Martha wondered if her yeast would create more bubbles if she mixed sugar in with the warm water. She added five grams of yeast and 50 milliliters of water to six flasks. She also added two grams of sugar to two of the flasks and four grams of sugar to two other flasks (leaving two with just water). She attached a balloon to the top of each flask and observed how much each balloon inflated after fifteen minutes.

In this experiment, which were part of a control

group?

a)

The flasks with water and two grams of sugar

b)

the flasks with only water

4.

A student notices that when she doesn’t sleep well, she usually does worse on schoolwork. Which part of scientific methodology describes her recording the grades and amount of sleep of her classmates?

a)

Making Observations and Asking Questions

b)

Inferring and Hypothesizing

c)

Designing Controlled Experiments

d)

Collecting Data

e)

Analyzing Conclusions

5.

Bill likes to go to horse races. At the races, he notices that a certain breed of horse usually comes in first place, while a different breed of horse usually comes in last place. Which of the following is a testable scientific question that Bill could ask about his observations?

a)

a. Do some horses want to win the race more than others?

b)

a. Are some breeds of horses prettier than others?

c)

a. Do slower breeds of horses lack determination?

d)

a. Do faster breeds of horses have longer legs?

6.

Adrian read about a new antimicrobial in a popular magazine. The advertisement claimed that the product Bactokil prevents bacterial growth. So, Adrian conducted a controlled experiment to test the product claims.

Adrian added 1 mL of a solution containing different concentrations of Bactokil to equivalent samples of Escherichia coli bacteria and plated them in Petri dishes. After 24 hours, he counted the number of colonies on each plate. A graph of his results is shown below.

Approximately how many colonies of E. coli are there at 0% concentration Bactokil?

a)

200

b)

210

c)

230

d)

250

7.

Adrian read about a new antimicrobial in a popular magazine. The advertisement claimed that the product Bactokil prevents bacterial growth. So, Adrian conducted a controlled experiment to test the product claims.

Adrian added 1 mL of a solution containing different concentrations of Bactokil to equivalent samples of Escherichia coli bacteria and plated them in Petri dishes. After 24 hours, he counted the number of colonies on each plate. A graph of his results is shown below.

Approximately how many colonies of E. coli are there at 100% concentration Bactokil?

a)

200

b)

210

c)

230

d)

250

8.

Adrian read about a new antimicrobial in a popular magazine. The advertisement claimed that the product Bactokil prevents bacterial growth. So, Adrian conducted a controlled experiment to test the product claims.

Adrian added 1 mL of a solution containing different concentrations of Bactokil to equivalent samples of Escherichia coli bacteria and plated them in Petri dishes. After 24 hours, he counted the number of colonies on each plate. A graph of his results is shown below.

Was Adrian's/ the company's hypothesis supported? (Read carefully)

a)

Yes; Increased Bactokil prevented the growth of bacteria

b)

No; increased Bactokil did not prevent the growth of bacteria

c)

Yes; increased Bactokil did not prevent the growth of bacteria

d)

No; increased Bactokil prevented the growth of bacteria

9.

if you add an enzyme to a chemical reaction, what will happen?

a)

the reaction will speed up and create less product

b)

the reaction will slow down and create less product

c)

the reaction will speed up and create more product

d)

the reaction will slow down and create more product

10.

What part of the enzyme catalyzed reaction is labeled with 1?

a)

Enzyme

b)

Active Site

c)

Substrate

d)

Products

11.

What part of the enzyme catalyzed reaction is labeled with 2?

a)

Enzyme

b)

Active Site

c)

Substrate

d)

Products

12.

What part of the enzyme catalyzed reaction is labeled with 3?

a)

Enzyme

b)

Active Site

c)

Substrate

d)

Products

13.

What happens when enzymes are put into environments that have a pH or temperature that is too high or low?

a)

the enzyme will increase the speed of chemical reactions

b)

the enzyme will bind new substrates

c)

the enzyme will denature and stop working

d)

Only temperature will cause the enzyme to stop; pH will have no effect

14.

which macromolecule has a nucleotide as a monomer (building block)?

a)

carbohydrate

b)

lipid

c)

protein

d)

nucleic acid

15.

which macromolecule has a monosaccharide as a monomer (building block)?

a)

carbohydrate

b)

lipid

c)

protein

d)

nucleic acid

16.

which macromolecule has a fatty acid as a monomer (building block)?

a)

carbohydrate

b)

lipid

c)

protein

d)

nucleic acid

17.

which macromolecule has a amino acid as a monomer (building block)?

a)

carbohydrate

b)

lipid

c)

protein

d)

nucleic acid

18.

Which of the following is NOT an element that is found in all living things?

a)

aluminum

b)

carbon

c)

sulfur

d)

hydrogen

19.

Jake wants to study which type of seed attracts more cardinals - What is step 1?

a)

select a suitable spot to observe cardinals

b)

set out a pile of sunflower seeds and grass seeds

c)

write a report on his findings

d)

observe and record the number of cardinals at each seed

20.

Jake wants to study which type of seed attracts more cardinals - What is step 2?

a)

select a suitable spot to observe cardinals

b)

set out a pile of sunflower seeds and grass seeds

c)

write a report on his findings

d)

observe and record the number of cardinals at each seed

21.

Jake wants to study which type of seed attracts more cardinals - What is step 3?

a)

select a suitable spot to observe cardinals

b)

set out a pile of sunflower seeds and grass seeds

c)

write a report on his findings

d)

observe and record the number of cardinals at each seed

22.

Jake wants to study which type of seed attracts more cardinals - What is step 4?

a)

select a suitable spot to observe cardinals

b)

set out a pile of sunflower seeds and grass seeds

c)

write a report on his findings

d)

observe and record the number of cardinals at each seed

23.

stomach acid is acidic, which means...

a)

it has more hydrogen (H+) ions than hydroxide(OH–) ions.

b)

it has fewer hydrogen (H+) ions than hydroxide(OH–) ions

c)

it has an equal number of hydrogen (H+) ions andhydroxide (OH–) ions

d)

it reacts with solutions with high concentrations of hydrogen (H+) ions

24.

1-6 on the pH scale is...

a)

Basic

b)

Neutral

c)

Acidic

25.

8-14 on the pH scale is...

a)

Basic

b)

Neutral

c)

Acidic

26.

7 on the pH scale is...

a)

Basic

b)

Neutral

c)

Acidic

27.

in what type of environment does the enzyme pepsin have the highest rate of reaction?

a)

Acidic

b)

Neutral

c)

Basic

d)

None of the above

28.

in what type of environment does the enzyme alkaline phosphatase have the highest rate of reaction?

a)

Acidic

b)

Neutral

c)

Basic

d)

None of the above

29.

What would happen if the enzyme pepsin was put in an environment with a pH of 8?

a)

it would become more efficient

b)

it would slow or stop functioning

c)

it would become the substrate for salivary amylase

d)

None of the above

30.

what event changes an atom into an ion?

a)

the sharing of electrons with another atom

b)

the gain or loss of one or more electrons

c)

the gain or loss of one or more neutrons

d)

a chemical reaction that forms a molecule

31.

what holds the atoms in a water molecule together? (not between different water molecules!)

a)

covalent bonds formed by shared electrons between O and H atoms

b)

covalent bonds formed by electrons that transfer between O and H atoms

c)

Ionic bonds formed by electrons that transfer between O and H atoms

d)

hydrogen bonds formed only by the electrons of the hydrogen atoms

32.

based on the image, what can you infer about the actual mass of the object being measured? (note where the pointer is)

a)

it is exactly 255 g

b)

it is more than 255 g

c)

it is less than 255 g

d)

it is exactly 205 g

33.

what volume is shown in the graduated cylinder?

a)

10 mL

b)

13 mL

c)

13.5 mL

d)

14 mL

34.

closed-toed shoes are best in the lab

a)

true

b)

false

35.

long hair must be held away from the experiment with one hand

a)

true

b)

false

36.

goggles are required any time chemicals, heat, or glassware are used

a)

true

b)

false

37.

you should dump chemicals in the sink

a)

true

b)

false

38.

you should use tongs to pick up glassware you have heated up

a)

true

b)

false

Biology Unit 1 Test Review

Total questions: 38

Worksheet time: 38mins

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