Pre-AP Biology Practice Unit 3 Test

1.

Multiple Choice

30 sec

1 pt

How does the stomata work?

It helps transport sugars to the root cells.

It helps to transport nutrients to the roots.

It helps to exchange gases and water.

It helps to conduct fermentation in the leaf.

2.

Multiple Choice

30 sec

1 pt

This organelle is found in plants and helps them to capture sunlight.

Chlorophyll

Chloroplast

Vacuole

Mitochondria

3.

Multiple Choice

1 min

1 pt

Mike has four aquatic plants of the same size and the same species. He submerges the plants in a separate beaker filled with 200 ml of water. She then sets each beaker under a different intensity of light. Mike observes that, of the four plants, the plant in the beaker under the most intense light gives off the most gas bubbles in a 20 minute period.
Which of the following statements best explains Mike’s observations?

Cells decompose most quickly under the most intense light.

Water evaporates from plants faster under the most intense light.

Photosynthesis occurs at the highest rate under the most intense light.

Gases in the leaves of plants expand most under the most intense light

4.

Multiple Choice

1 min

1 pt

Why are there less air bubbles as the plant is place further away from the light source

because cellular respiration decreases when there is less light

because the light independent reaction decreases when there is less light

because photosynthesis decreases as a plant is moved further away from a light source

the wavelength increases as a plant is placed further away from a light source

5.

Multiple Choice

45 sec

1 pt

What is the correct equation for cellular respiration?

6O₂ + C₆H₁₂O₆ -> 6CO₂ + 6H₂O + Energy

6O₂ + C₆H₁₂O₆ + Energy -> 6CO₂ + 6H₂O

6CO₂ + 6H₂O -> 6O₂ + C₆H₁₂O₆ + Energy

6CO₂+ 6H₂O + Energy -> 6O₂ + C₆H₁₂O₆

6.

Multiple Choice

20 sec

1 pt

Chlorophyll is green because

it absorbs green wavelengths of light

it absorbs blue and yellow wavelengths which make green

it transmits light and causes an optical illusion

it reflects green wavelengths of light

7.

Multiple Choice

30 sec

1 pt

All organic molecules contain carbon that ultimately can be traced back in the food chain to:

the bodies of heterotrophs

carbon dioxibe from the atmosphere

water absorbed by plants

the carbon that comes from the sun

8.

Multiple Choice

45 sec

1 pt

Graph 1 demonstrates that the rate of photosynthesis

decreases in response to increasing light intensity

increases indefinitely in response to increasing light intensity

increases in response to increasing light intensity, but only to a certain point

is unaffected by changes in light intensity

9.

Multiple Choice

30 sec

1 pt

What happens to light energy when it is used by plants in photosynthesis?

its turned into glucose

its turned into Carbon dioxcide

its turned into air

10.

Multiple Choice

30 sec

1 pt

What is the equation for photosynthesis?

6CO₂ + 6H₂0 ----> C₆H₁₂O₆+ 6O₂

6CO₂ _----->C₆H₁₂O₆

11.

Multiple Choice

30 sec

1 pt

Where do the light and dark reactions happen in the plant?

in the mitochondria

in the chloroplast

in the roots

in the stem

12.

Multiple Choice

2 mins

1 pt

The carbon cycle circulates carbon dioxide and oxygen throughout an ecosystem. Which statement below best explains the role of photosynthesis and cellular respiration in the carbon cycle?

Animals take CO₂ out of the atmosphere through the process of photosynthesis and plants release CO₂ back into the atmosphere through the process of cellular respiration.

Animals take O₂ out of the atmosphere through the process of cellular respiration and release O₂ back into the atmosphere through the process of cellular respiration.

Plants take O₂ out of the atmosphere through the process of photosynthesis and animals release CO₂ into the atmosphere through the process of cellular respiration.

Plants take CO₂ out of the atmosphere through the process of photosynthesis and animals release CO₂ back into the atmosphere through the process of cellular respiration.

13.

Multiple Choice

1 min

1 pt

Which of the graphs represents the effect of light intensity on the rate of photosynthesis?

B.

A.

D.

C.

14.

Multiple Choice

1 min

1 pt

Which of the graphs represents the effect of carbon dioxide levels on the rate of photosynthesis?

D.

B.

A.

C.

15.

Multiple Choice

30 sec

1 pt

What are the products of cellular respiration?

Glucose and water

Glucose and carbon dioxide

Oxygen and water

Carbon dioxide and water

16.

Multiple Choice

45 sec

1 pt

During photosynthesis in plants, what is the source of the carbon in the sugar molecule (C₆H₁₂O₆) produced?

carbon particles in the soil

carbon dioxide in the air

carbon monoxide in the air

carbon particles in water

17.

Multiple Choice

1 min

1 pt

Which diagram accurately represents the use of the gases from both cellular respiration and photosynthesis?

C.

B.

A.

18.

Multiple Choice

1 min

1 pt

Which of the following is the correct equation for photosynthesis?

6O₂ + C₆H₁₂O₆ + Energy → 6CO₂ + 6H₂O

6O₂ + C₆H₁₂O₆→ 6CO₂ + 6H₂O + Energy

6CO₂ + 6H₂O + Energy → 6O₂ + C₆H₁₂O₆

6CO₂ + 6H₂O → 6O₂ + C₆H₁₂O₆ + Energy

19.

Multiple Choice

1 min

1 pt

The diagram represents the effects of temperature on the rate of photosynthesis of the Elodea plant. Which statement best explains the results of the study?

As temperature increases, the rate of photosynthesis constantly increases.

As temperature increases, the rate of carbon dioxide bubbles constantly increases.

The rate of photosynthesis increases as temperature increases up to around 25⁰ C and then decreases.

The rate of carbon dioxide bubbles increases as temperature increases up to around 25⁰ C and then decreases.

20.

Multiple Choice

45 sec

1 pt

Which of the following is the correct equation for cellular respiration?

6CO₂+6H₂O → 6O₂+ C₆H₁₂O₆+ Energy

6O₂+C₆H₁₂O₆→ 6CO₂+ 6H₂O + Energy

6CO₂+6H₂O + Energy → 6O₂+ C₆H₁₂O₆

6O₂+C₆H₁₂O₆ + Energy → 6CO₂+ 6H₂O

21.

Multiple Choice

20 sec

1 pt

What is the organelle depicted in the diagram?

chloroplast

mitochondria

nucleus

vacuole

22.

Multiple Choice

20 sec

1 pt

What is the process called which is depicted by the diagram?

cellular respiration

photosynthesis

alcoholic fermentation

anaerobic respiration

23.

Multiple Choice

45 sec

1 pt

What are the products of the process shown in the diagram?

water and sugars

water and carbon dioxide

oxygen and water

oxygen and sugars

24.

Multiple Choice

30 sec

1 pt

Alcoholic fermentation and lactic acid fermentation produce 2 ATP molecules. How many are produced through cellular respiration?

4 ATP

20 ATP

26 ATP

36 ATP

25.

Multiple Choice

30 sec

1 pt

What does the term anaerobic respiration refer to?

A process that takes place with no oxygen present

A process that takes place with oxygen present

A process that takes place with no carbon dioxide present

A process that takes place only in yeast cells

26.

Multiple Choice

30 sec

1 pt

How could a scientist measure the rate of cellular respiration of a snail in water with only her eyes?

She would count the carbon dioxide bubbles release into the water

She would count the bubbles of oxygen released into the water

She would look for sugar molecules in the water.

She would use an indicator to measure the increase of oxygen in the water

27.

Multiple Choice

45 sec

1 pt

When investigating the effect of light intensity on the rate of photosynthesis, what variables should be kept the same

Temperature and carbon dioxide concentration

Temperature and light intensity

Light intensity and carbon dioxide concentration

All of the above

28.

Multiple Choice

20 sec

1 pt

why do we need to respire?

to release energy from glucose

to create energy

to breathe

to release energy from oxygen

29.

Multiple Choice

30 sec

1 pt

how is anaerobic respiration different to aerobic respiration?

it doesn't require glucose

it happens faster

it doesn't require oxygen

it takes longer

30.

Multiple Choice

30 sec

1 pt

"2" represents which reactant of photosynthesis?

carbon dioxide

glucose

water

oxygen

31.

Multiple Choice

30 sec

1 pt

"6" represents which product of photosynthesis?

carbon dioxide

glucose

water

oxygen

32.

Multiple Choice

30 sec

1 pt

"5" represents which product of photosynthesis?

carbon dioxide

glucose

water

oxygen

33.

Multiple Choice

30 sec

1 pt

The worst thing you can do for the health of a green-leafed plant is to illuminate it with only

red light

green light

blue light

all are equally bad

34.

Multiple Choice

30 sec

1 pt

Which wavelengths of light are absorbed by chlorophyll?

yellow and red

red

blue and yellow

red and blue

35.

Multiple Choice

30 sec

1 pt

What wavelengths of light does chlorophyll reflect?

blue

yellow

red

green

36.

Multiple Choice

30 sec

1 pt

According to the graph, which pair of colors of light has the highest rate of photosynthesis?

green and yellow

violet and yellow

red and violet

green and orange

37.

Multiple Choice

20 sec

1 pt

If this was a plant in a lake, what would these bubbles be composed of?

oxygen gas

carbon dioxide gas

glucose

water

38.

Multiple Choice

30 sec

1 pt

Which process occurs in the area marked "4"?

stroma

thylakoid

light-dependent reaction

light-independent reaction

39.

Multiple Choice

30 sec

1 pt

Where does the light independent stage of photosynthesis occur?

grana

stroma

thylakoid membranes

cytosol

40.

Multiple Choice

20 sec

1 pt

Include sugars (ex. glucose) and starches

Carbohydrates

Lipids

Proteins

Nucleic Acids

41.

Multiple Choice

30 sec

1 pt

Provide quick energy and serve as structural components of plant cells

Carbohydrates

Lipids

Proteins

Nucleic Acids

42.

Multiple Choice

45 sec

1 pt

What is one function of the other pigments besides chlorophyll, in the chloroplast?

to block damaging wavelengths of light

to absorb different wavelengths than the chloroplasts

to provide different colors to the leaves

to transfer energy to a separate photosystem beside the one using chlorophyll a and b.

43.

Multiple Choice

30 sec

1 pt

In the snail and elodea experiment, which organisms were putting carbon dioxide into the water?

snails

elodea

snails and elodea

neither

44.

Multiple Choice

30 sec

1 pt

In the snail and elodea experiment, which organisms were taking carbon dioxide out of the water?

snails

elodea

snails and elodea

neither

45.

Multiple Choice

45 sec

1 pt

How were the results different when the snails and elodea were put in the dark?

carbon dioxide built up because no photosynthesis could occur.

oxygen built up because cellular respiration slowed down.

carbon dioxide was removed because cellular respiration increased

oxygen was added because cellular respiration was increased

46.

Multiple Choice

20 sec

1 pt

Where do the light-independent reactions occur?

thylakoid

stroma

lumen

mitochondria

47.

Multiple Choice

20 sec

1 pt

It forms a boundary between the inside of the cell and the outside of the cell.

Cell Membrane

Lipid Cleric Layer

Membrane Gate

Protein Receptors

48.

Multiple Choice

20 sec

1 pt

Controls the passage of materials inside and outside of the cell.

Cell Membrane

Lipid Cleric Layer

Membrane Gate

Protein Receptors

49.

Multiple Choice

45 sec

1 pt

How can photosynthesis be related to cellular respiration?

What's produced (made) by one is needed (the reactants) for the other

They both produce the same products

They both have the same reactants (need the same things)

These 2 processes have nothing in common

50.

Multiple Choice

20 sec

1 pt

What are the products of photosynthesis?

Carbon dioxide and water

Carbon dioxide and oxygen

Glucose and oxygen

Glucose and water

51.

Multiple Choice

30 sec

1 pt

The ability to keep producing energy even when no oxygen is present is called

Photosynthesis

Glycolysis

Fermentation

Oxidation

52.

Multiple Choice

1 min

1 pt

Besides alcohol, What is the product of alcoholic fermentation?

Glucose

Carbon dioxide

Oxygen

Pyruvic acid

53.

Multiple Choice

1 min

1 pt

This process does not make ATP alone, but it allows glycolysis to continue making ATP when oxygen is unavailable for cellular respiration.

Fermentation

Electron Transport Chain

Glycolysis

Kreb's cycle

54.

Multiple Choice

1 min

1 pt

What is a disadvantage of fermentation?

It produces too much ATP

It only produces 2 ATP

It occurs in the absence of oxygen

It is only for quick bursts of energy

55.

Multiple Choice

30 sec

1 pt

The waste products of alcoholic fermentation are ethanol and

CO₂

pyruvate

citrate

ADP

56.

Multiple Choice

30 sec

1 pt

A student exposed two plants to only red light and two plants to only green light. Which plants should grow better?

those under the red light

those under the green light

both will grow the same amount

neither will grow

57.

Multiple Choice

30 sec

1 pt

Looking at the graph, what is the dependent variable?

distance from light source

number of air bubbles per minute

light source

color of light

58.

Multiple Choice

2 mins

1 pt

A student poured a solution of bromthymol blue indicator into two test tubes (BTB turns yellow in the presence of carbon dioxide). Then, he placed an aquatic plant in the test tubes. He placed a stopper on each test tube and placed them all in the dark for 24 hours. What color would you expect the solution to be after 24 hours in the dark?

blue

green

yellow

59.

Multiple Choice

2 mins

1 pt

A student poured a solution of bromthymol blue indicator into two test tubes (BTB turns yellow in the presence of carbon dioxide). Then, he placed an aquatic plant in the test tubes. He placed a stopper on each test tube and placed them all in the dark for 24 hours. He then put one of the tubes in the light for 24 hours. What color would you expect the solution to be after 24 hours of light?

blue

green

yellow

60.

Multiple Choice

30 sec

1 pt

What is it called when plants give off water vapor as a waste product?

condensation

evaporation

sublimation

transpiration

61.

Multiple Choice

30 sec

1 pt

What is it called when plants give off water vapor as a waste product?

condensation

evaporation

sublimation

transpiration

62.

Multiple Choice

30 sec

1 pt

What follows evaporation during the water cycle? How does this occur?

Water evaporates into water vapor

Water vapor condenses and forms a cloud

Water precipitates to the ground

Water runs down into the hydrosphere

63.

Multiple Choice

30 sec

1 pt

What happens after groundwater at the very end/beginning of the water cycle?

Evaporation

Transpiration

Condensation

Groundwater

64.

Multiple Choice

30 sec

1 pt

What part of the water cycle does this picture show?

condensation

precipitation

evaporation

65.

Multiple Choice

30 sec

1 pt

What part of the water cycle does this picture show?

condensation

precipitation

evaporation

66.

Multiple Choice

30 sec

1 pt

Transpiration is a type of ______.

Liquidation

Condensation

Evaporation

67.

Multiple Choice

30 sec

1 pt

What cycle is transpiration a part of?

The water cycle

The life cycle

The bicycle

68.

Multiple Choice

5 mins

1 pt

Many years of deforestation (cutting down our trees) have occurred in the Amazon rainforest. What can be a problem for the environment if this trend continues.

Less oxygen will be produced

Carbon dioxide will be reduced

Water intake would increase

Less sunlight would penetrate the area

69.

Multiple Choice

30 sec

1 pt

Decomposition is a natural process of the carbon cycle. When an organism dies, what is the benefit?

Dying animals release oxygen and bacteria use it to produce carbon dioxide

bacteria break down the molecules, to return to the soil

Animals become fossil fuels immediately.

Bacteria uses glucose and oxygen from the decaying material.

70.

Multiple Choice

5 mins

1 pt

A giant sequoia tree can grow over 3000 years. As it increases in height, what molecule does it convert to use in its trunk?

Glucose => Carbon

Water => Oxygen

Oxygen => Glucose

Carbon => Water

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