What is the end result of mitosis?

Four genetically different cells

What is the main purpose of the light-dependent reactions in photosynthesis?

To split water and produce ATP and NADPH

Which of the following best describes the role of enzymes in metabolism?

They lower the activation energy of reactions

They increase the activation energy of reactions

How does the structure of a mitochondrion relate to its function in cellular respiration?

Its folded inner membrane increases surface area for ATP production

Its smooth outer membrane allows for photosynthesis

Its rigid cell wall protects the cell

Its chlorophyll absorbs sunlight

What would happen if the spindle fibers did not form during mitosis?

Chromosomes would not separate properly

Chromosomes would not replicate

The nuclear envelope would not break down

How does the cell cycle ensure that damaged DNA is not passed on to daughter cells?

Through cell cycle checkpoints that detect and repair DNA damage

By increasing the rate of cell division

Which of the following best explains why cancer cells divide uncontrollably?

They ignore cell cycle checkpoints

Why is it important for cells to regulate the timing of the cell cycle?

To prevent uncontrolled cell growth and maintain healthy tissues

To ensure all cells divide at the same time

To increase the number of mitochondria

How does the process of photosynthesis benefit heterotrophic organisms?

It provides oxygen and organic molecules for them to use

It allows them to produce their own food

It increases their body temperature

A scientist observes a cell with chromosomes aligned at the center and spindle fibers attached. Which phase of mitosis is being observed, and what is the significance of this arrangement?

Metaphase; ensures equal chromosome separation

Prophase; chromosomes are condensing

Anaphase; chromosomes are being pulled apart

Telophase; nuclear envelope reforms

A mutation causes an enzyme to lose its specific shape. Predict the most likely effect on the enzyme's function.

The enzyme will not function properly

The enzyme will produce more products

The enzyme will become a carbohydrate

If a plant is placed in an environment with no light, what will happen to the rate of photosynthesis and why?

It will decrease because light is required for the process

It will increase because more oxygen is available

It will stay the same because photosynthesis does not need light

It will decrease because carbon dioxide is not available

A cell is found to have twice the normal amount of DNA but has not yet divided. In which phase of the cell cycle is this cell most likely to be, and why?

G2 phase; cell is preparing for mitosis after DNA replication

G1 phase; DNA is being synthesized

S phase; DNA replication is complete

M phase; chromosomes are separating

A person is unable to break down lactose due to a lack of the enzyme lactase. What is the most likely consequence of this deficiency?

Lactose will accumulate and cause digestive discomfort

Lactose will be digested normally

Glucose will be produced in excess

The person will have increased energy

A cell fails to pass the G1 checkpoint due to DNA damage. What is the most likely outcome for this cell?

It will repair the damage or undergo apoptosis

It will proceed to DNA replication

Explain why the process of mitosis is essential for multicellular organisms.

It enables growth and repair by producing identical cells

It allows for genetic variation

It produces gametes for reproduction

It increases the number of mitochondria

A scientist blocks the function of ATP synthase in mitochondria. Predict the effect on cellular respiration.

ATP production will decrease significantly

Carbon dioxide will not be released

A mutation causes a cell to skip the G2 checkpoint and enter mitosis with damaged DNA. What is a possible consequence of this event?

The cell may produce abnormal daughter cells, leading to disease

The cell will repair the DNA before dividing

What is the role of the spindle fibers during mitosis?

They attach to chromosomes and help separate them

What is the main function of the G2 phase in the cell cycle?

Preparation for mitosis by checking for DNA errors

Cell growth and normal functions

Which event is most likely to occur if a cell loses control over its cell cycle checkpoints?

Uncontrolled cell growth leading to tumor formation

Which of the following best explains why enzymes are specific to particular reactions?

Their active sites fit only certain substrates

Which of the following best describes the function of ribosomes in a cell?

They synthesize proteins from amino acids

They produce ATP through cellular respiration

What is the main difference between mitosis and meiosis?

Mitosis produces identical cells, while meiosis produces genetically different cells

Mitosis occurs only in plants, while meiosis occurs only in animals

Mitosis requires oxygen, while meiosis does not

Mitosis results in four cells, while meiosis results in two cells

Biology Quiz: Cells and Processes

9th Grade

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40 Qs

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Biology Quiz: Cells and Processes

Quiz

•

Science

•

9th Grade

•

Practice Problem

•

Medium

•

NGSS

HS-LS1-4, HS-LS1-7, HS-LS1-5

Standards-aligned

Richard Frazier

Used 14+ times

FREE Resource

40 questions

Show all answers

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the main function of enzymes in biological systems?

To provide energy for cells

To speed up chemical reactions

To store genetic information

To transport oxygen

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is a product of cellular respiration?

Glucose

Oxygen

Carbon dioxide

Sunlight

Tags

NGSS.HS-LS1-7

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the primary pigment involved in photosynthesis?

Hemoglobin

Chlorophyll

Melanin

Keratin

Tags

NGSS.HS-LS1-5

NGSS.HS-LS2-5

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

During which phase of mitosis do chromosomes line up in the middle of the cell?

Prophase

Metaphase

Anaphase

Telophase

Tags

NGSS.HS-LS1-4

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which phase of the cell cycle involves DNA replication?

G1 phase

S phase

G2 phase

M phase

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the main function of carbohydrates in living organisms?

Store genetic information

Provide energy

Speed up reactions

Form cell membranes

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is NOT a stage of cellular respiration?

Glycolysis

Krebs cycle

Calvin cycle

Electron transport chain

Tags

NGSS.HS-LS1-7

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Biology Quiz: Cells and Processes

40 questions

What is the main function of enzymes in biological systems?

Which of the following is a product of cellular respiration?

What is the primary pigment involved in photosynthesis?

During which phase of mitosis do chromosomes line up in the middle of the cell?

Which phase of the cell cycle involves DNA replication?

What is the main function of carbohydrates in living organisms?

Which of the following is NOT a stage of cellular respiration?

What is the end result of mitosis?

Which biomolecule is primarily responsible for storing genetic information?

What is the main purpose of the light-dependent reactions in photosynthesis?

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