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Biology practice questions for B2.

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Biology - B2 - AQA - GCSE - Exam Style Questions

Question 1 of 22

1

Name the product of protein digestion.

Select one of the following:

  • Amino acid

  • Protease

  • Hydrochloric Acid

Explanation

Question 2 of 22

1

What is an allele?

Select one of the following:

  • A variation of a gene

  • A type of gene

  • A mutated cell

  • Thick, jelly like substance in the nucleus

Explanation

Question 3 of 22

1

Select the process in the body that is NOT done by diffusion

Select one of the following:

  • Water loss from leaves/transpiration

  • Glucose molecules absorbed

  • Gas exchange - Carbon dioxide out, oxygen in

  • Moving particles (e.g mineral ions) against the concentration gradient

Explanation

Question 4 of 22

1

Pepsin is made by the stomach.

Name the acid made by the stomach that allows pepsin to work well.

Select one of the following:

  • Amino acid

  • Hydrochloric acid

  • Nitric acid

Explanation

Question 5 of 22

1

Which of the following is NOT a process done by diffusion?

Select one of the following:

  • Taking in substances for use in cell processes

  • Removing products of cell processes

  • Carrying oxygen around the body

Explanation

Question 6 of 22

1

What type of enzyme digests dietary fats?

Select one of the following:

  • Lipase

  • Protease

  • Amylase

  • Carbohydrase

  • Nothing

Explanation

Question 7 of 22

1

Diffusion is the movements of molecules through a fully permeable membrane against the concentration gradient.

Select one of the following:

  • True
  • False

Explanation

Question 8 of 22

1

Name the process that makes lactic acid in an athlete's muscles.

Select one of the following:

  • Anaerobic respiration

  • Aerobic respiration

  • Urination

  • Nothing

Explanation

Question 9 of 22

1

In a hydroponic system (when farmers grow crops in greenhouses with no soil) an air pump and airstone makes bubbles of air in a solution of ions. Gases from the air will dissolve into the solution.

Explain how this helps keep the plant's root alive.

Select one of the following:

  • Supplies oxygen which allows respiration meaning more energy for growth and active transport.

  • Changes the volume of the solution to trick the plant into not transpiring (losing water)

  • Changes the concentration to allow diffusion

Explanation

Question 10 of 22

1

Which type of enzyme digests protein?

Select one of the following:

  • Protease

  • Amylase

  • Lipase

  • Carbohydrase

Explanation

Question 11 of 22

1

Each molecule of chlorophyll contains a magnesium ion.

Why do plants need magnesium ions for healthy growth?

Select one of the following:

  • To make chlorophyll which traps light and uses it for energy in photosynthesis.

  • To make chlorophyll which can be processed and made into glucose for the plant

  • To make the sap vacuole inside plant cells.

Explanation

Question 12 of 22

1

Name one ion that plants take in to supply them with nitrogen.

Select one of the following:

  • Nitrate

  • Air

  • Carbon dioxde

  • Minerals

Explanation

Question 13 of 22

1

Why is more lactic acid made in the muscles when running at 14 km per hour than when running at 8 km per hour?

Select one of the following:

  • More energy is needed and there is not enough oxygen getting to cells so more anaerobic respiration.

  • The runner needs more energy so food is digested quicker, lactic acid is produced as a byproduct of this.

  • More energy is needed but there is not enough oxygen getting to cells so more aerobic respiration.

Explanation

Question 14 of 22

1

What is meant by a recessive allele?

Select one of the following:

  • Only expressed if dominant allele is not present.

  • Only expressed if dominant allele is present.

  • Only expressived if there is one.

Explanation

Question 15 of 22

1

Early life forms were soft-bodied.

Explain why this makes it difficult for scientists to be certain about what these early life forms were like.

Select one of the following:

  • Fossils destroyed due to soft parts decaying.

  • No evidence.

  • They were eaten, they rarely died of natural causes.

Explanation

Question 16 of 22

1

Plants need a supply of the element nitrogen to make certain substances.

Select the substance that nitrogen does NOT make.

Select one of the following:

  • Protein

  • Amino acids

  • Enzymes

  • Glucose

Explanation

Question 17 of 22

1

Students did an experiment to find out where different types of seaweed live on a seashore. They used quadrats.

Which of the following would NOT improve their investigation to ensure they produced valid data?

SE

Select one of the following:

  • Repeating the experiment several times

  • Placing the quadrat elsewhere along the shore

  • Getting a larger quadrat

Explanation

Question 18 of 22

1

Which type of enzyme digests carbohydrates?

Select one of the following:

  • Protease

  • Carbohydrase

  • Lipase

  • Urine

Explanation

Question 19 of 22

1

During IVF treatment, each fertilised egg cell forms an embryo by cell division.

What is this type of cell division?

Select one of the following:

  • Meiosis

  • Mitosis

  • Cloning

Explanation

Question 20 of 22

1

Genetic material is made up of large molecules of a chemical substance.

What is this chemical substance?

Select one of the following:

  • DNA

  • Amino acid

  • Glucose

Explanation

Question 21 of 22

1

A bladder wrack (a type of seaweed) has many air bladders.

The air bladders help the bladder wrack to float upwards when the sea covers it.

Suggest how this helps the bladder wrack to survive.

Select one of the following:

  • Means it is closer to the light, so more photosynthesis

  • More minerals at the surface of the water for it to absorb

  • There is less carbon dioxide at the surface of the water, meaning more oxygen for photosynthesis

Explanation

Question 22 of 22

1

There are a number of reasons why organisms may not mate sucessfully.

Select the odd one out.

Select one of the following:

  • They are different sexes

  • It is not mating season

  • They do not find each other attractive

  • They are juvenile

Explanation

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