0610 Biology June 2025 Question Paper 22

The photograph shows an animal called a margay. Four processes that occur in the margay are listed. ● excretion ● growth ● digestion ● respiration How many of the processes that occur in the margay are characteristics of all living organisms?

2 Part of the base sequence of DNA from four species was determined.

species 1 T C A G G A T T species 2 T G A G C A A T species 3 T G A G C A A G species 4 T G A G G A T T

Which two species are the least closely related? A 1 and 2 B 1 and 3 C 2 and 4 D 3 and 4

3 A single-celled organism has chloroplasts, a cell wall and a nucleus.

Which kingdom is this organism placed in? A fungus B plant C prokaryote D protoctist

Part of the base sequence of DNA from four species was determined. species 1 T C A G G A T T species 2 T G A G C A A T species 3 T G A G C A A G species 4 T G A G G A T T Which two species are the least closely related?

A student measured the length of a structure using a microscope. The magnification used was 250. The image size of the structure was 5.00 mm. What was the actual length of the structure?

Which row shows the conditions when diffusion of oxygen into the blood is fastest? alveolar surface area concentration gradient diffusion path distance

Uncooked potato cylinders of identical size were placed in four different liquids for two hours. The different liquids are listed. pure water a sugar solution that was less concentrated than the contents of the potato cells a sugar solution that was more concentrated than the contents of the potato cells a sugar solution that was the same concentration as the contents of the potato cells In which liquids will the potato cylinders increase in length?

What is the correct definition of enzymes?

A student investigated how the rate of photosynthesis is affected by carbon dioxide concentration, temperature and light intensity. The graphs show the results. rate of photosynthesis carbon dioxide concentration rate of photosynthesis light intensity rate of photosynthesis temperature What is a correct statement for these results?

The diagram shows a cross-section of part of a leaf. X What is the cell labelled X?

In which parts of the digestive system does physical digestion occur?

The table shows the substrates and end products in four enzyme-controlled chemical reactions. Which reaction was controlled by lipase? substrate end product

What is the function of microvilli in the small intestine?

Which row shows the features of xylem vessels? vessel walls mitochondria present

A student wanted to investigate the effect of humidity on transpiration. She set up two sets of apparatus with identical-sized plants of the same species. tube X tube Y oil water plastic bag The masses of the water in both tubes were measured at the start of the investigation and again after five days. The table shows the results of the investigation. tube mass of the water in the tube at the start / g mass of the water in the tube at the end / g X 40.3 34.6 Y 41.0 39.4 Which statement describes and explains these results?

What is an advantage of a double circulatory system?

Which structure in the heart separates oxygenated and deoxygenated blood?

Which row shows the features of a vein? relative thickness of the wall to total vessel diameter diameter of the lumen presence or absence of valves

Three statements about immunity are listed. The transfer of antibodies from mother to baby in breast milk is an example of passive immunity. Passive immunity results in long-term immunity because of the production of memory cells. Active immunity is gained after vaccination with antigens. Which statements are correct?

The table shows the breathing rate and the average total volume of air breathed by a student when exercising for 20 minutes. time / minutes breathing rate / breaths per minute average total volume of air breathed / cm3 per minute 5 000 9 000 15 000 20 000 25 000 Which conclusion can be made from the data in the table about the effect of exercise on breathing?

What is the chemical formula of glucose?

After a race, athletes experience oxygen debt. The diagram shows how the oxygen debt is removed. lactic acid forms in the muscles lactic acid moves in the blood to the liver faster breathing supplies extra oxygen X What happens at X?

Which organ produces urea?

The diagram shows a vertical section through part of a human eye. A fly is coming nearer to the eye. The eye begins to focus the image of the fly on the retina. Q R S fly How do the labelled parts of the diagram change? Q R S

Which organ produces glucagon?

A young seedling is growing underground. The shoot grows towards the surface of the ground. The root grows away from the surface of the ground. Which row describes the responses involved? gravitropism phototropism root shoot root shoot

Clostridium difficile is a species of bacterium that is resistant to many antibiotics. From 2002 to 2006, the number of people in one country infected with Clostridium difficile increased from 1300 to 6200 people. What was the percentage increase in the number of people infected with Clostridium difficile from 2002 to 2006 to the nearest whole number?

What are the characteristics of asexual reproduction? fusion of gamete nuclei genetic variety in the offspring

Which description of cross-pollination is correct?

Which row correctly links the named process with its description? process description

The diagram shows the inheritance of a genetic condition in one family. female with condition female without condition male with condition male without condition key What can be concluded about this genetic condition?

What is a way in which new alleles are formed?

How does artificial selection differ from natural selection?

Which diagram of a xerophyte is labelled correctly? waxy layer to stop water evaporation extensive root systems to maximise water uptake

Which row describes the energy flow into and through a food chain that starts with a plant? energy entering a food chain energy transferred between organisms in a food chain

In a food chain, zebras are large mammals that eat grass. The zebras have many insects living on them which suck their blood. Birds eat the insects. The diagrams show some biological pyramids. Which row identifies the types of pyramids for this food chain? pyramid of energy pyramid of numbers

The diagram shows part of the nitrogen cycle. organic material nitrogen gas ammonium ions nitrate ions X What is the process labelled X in the diagram?

The graph shows the number of water fleas in a newly-created pond. time number of water fleas Y Which event could be responsible for the shape of the graph at Y?

When managing fish stocks as a sustainable resource, what is a reason for harvesting only the larger fish of a particular species?

Which features make bacteria useful in biotechnology? They are unaffected by antibiotics. They do not contain plasmids. They make complex molecules. They reproduce rapidly.