OCR GCSE Combined Science A (Gateway) Biology Paper 1 Foundation June 2022 question paper J250/01

Which part of the cell provides a selective barrier to molecules entering the cell?

A Cell membrane

B Cell wall

C Cytoplasm

D Plasmid

A microscope has a ×10 eyepiece lens and a ×40 objective lens.

What is its magnification?

A ×10

B ×40

C ×50

D ×400

Which two terms describe the structure of DNA?

A Monomer and double helix

B Monomer and triple helix

C Polymer and double helix

D Polymer and triple helix

The diagram shows a model of a protein molecule.

Which substance is labelled P in the diagram?

A Amino acid

B Fatty acid

C Glucose

D Glycerol

Which statement describes a substance being transported into the human body from the outside?

A Carbon dioxide diffuses into the blood from the cells.

B Food molecules diffuse into the liver from the blood.

C Oxygen diffuses into the blood from the air.

D Urea diffuses into the blood from the liver.

Why do root hair cells require large numbers of mitochondria?

A For the uptake of minerals by active transport.

B For the uptake of water by active transport.

C For the uptake of minerals by osmosis.

D For the uptake of water by osmosis.

Which statement is true for type 1 diabetes and false for type 2 diabetes?

A The body stops responding to insulin, insulin injections are needed.

B The body stops responding to insulin, insulin injections are not needed.

C The pancreas stops making insulin, insulin injections are needed.

D The pancreas stops making insulin, insulin injections are not needed.

Which statement is true of both adult and embryonic stem cells?

A They are in all adult and embryonic tissues.

B They are only used to make blood cells.

C They can divide by mitosis.

D They cannot differentiate.

The diagram shows the root tip of a plant.

Which label, A, B, C or D, identifies the position of stem cells in the root tip?

The diagram shows the central nervous system (CNS).

Complete the sentence to describe the structure of the CNS. Use the diagram.

The CNS is made up of the........ and the........ cord.

Hot objects can burn your skin. Removing your hand from a hot object is a reflex action. The response is a reflex action because it is controlled by a reflex arc.

Suggest two other reasons why the response is a reflex action.

Draw lines to connect each part of the reflex arc to its correct function when responding to a hot object.

A student uses a computer program to measure the reaction times of their friends.

The table shows their results.

Identify the median reaction time for the five friends.

Calculate the mean reaction time for the five friends.

Use the data in the table to suggest one reason why friend D has the fastest reaction time.

Adrenaline is a hormone that speeds up reaction times.

Describe the typical features of hormonal coordination such as adrenaline in the body.

*(i) Describe and explain the pattern in the results.

Use ideas about the lock and key hypothesis in your answer.

Describe how the student could improve their investigation to find a more accurate optimum pH for the enzyme.

Plants are important for life on Earth as they photosynthesise and provide oxygen.

Describe one other reason why plants are important to life on Earth.

A scientist investigates the effect of temperature on the rate of photosynthesis.

The diagram shows the apparatus they use.

The scientist counts the number of bubbles released by the water plant in 10 minutes.

They repeat this method with different temperatures of water.

The table shows their results.

The scientist decides to repeat the investigation for 20 °C. Suggest why.

When the scientist repeats the investigation at 20 °C the result is 26 bubbles.

Use this result and the results in the table to describe the effect of temperature on the rate of photosynthesis.

The scientist decides to use the apparatus to investigate the effect of light intensity on photosynthesis.

Describe how they could use the apparatus to change light intensity.

Respiration releases energy from food. The energy content of food can be measured by burning the food. A student measures the energy content of some different foods.

The student finds the energy content by measuring the change in temperature of the water.

Identify the piece of apparatus labelled X in the diagram.

The table shows the change in temperature for one type of food.

Calculate the energy content of the food using this formula.

Energy content = 20 × 4.2 × change in temperature

The student converted all their results to find the energy content in kJ per gram of food.

The graph shows the results.

What is the energy content of food type D ?........ kJ per gram

Eating food type B provides the body with more ATP molecules than eating the same mass of food type E.

Use your knowledge of cellular respiration to explain why.

Plants and animals both have transport systems.

Fig. 15.1 shows cells found in the transport system of animals.

Fig. 15.1

Identify the type of cell shown in Fig. 15.1.

The transport system in animals is the circulatory system.

Describe the relationship between the circulatory system and the gas exchange system in the human body.

Phloem is part of the transport system in plants. Fig. 15.2 is a diagram of phloem sieve tubes.

Fig. 15.2

Explain how phloem sieve tubes are adapted to their function. Use Fig. 15.2.

Fig. 15.3 shows apparatus used to investigate the rate of water uptake in plants.

Fig. 15.3

Name the apparatus shown in Fig. 15.3.

The air-tight seal stops air getting into the water-filled tube.

Suggest why it is important to stop air getting into the tube.

The apparatus is set up and left for 10 minutes. The water level moved 8 mm.

Calculate the rate of water uptake in mm per second.

Give your answer to 2 significant figures.

Rate of water uptake =........ mm per second [3]

The investigation is repeated with an electric fan switched on next to the apparatus.

The rate of water uptake would increase / decrease / stay the same.