May/June 2017

What characteristic is shown by every living organism?

Characteristics of living organisms

In plants, which ions are needed to produce amino acids?

Xylem and phloem

Which illness can be caused by a deficiency of vitamin C?

Diet

Within which structure do storage and assimilation take place?

Cell structure

The diagram illustrates a human tooth. Which statement gives the best description of the function of this tooth?

Physical digestion

To shield certain medicines from the action of gastric juice, some tablets are covered with a starch-like material. Which enzyme breaks down the coating, and what substance is formed by this process?

Enzymes

The diagrams illustrate cross-sections of a root and a stem. Which labels are correct?

Xylem and phloem

A strip of blue cobalt(II) chloride paper is attached to the underside of a fresh leaf and then covered with plastic, as shown. After a few minutes, part of the paper becomes pink, which shows that water is present. Which process in leaves makes the paper turn pink?

Transpiration

The diagram illustrates a slice through the mammalian heart. Which of the labelled structures are arteries?

Blood vessels

Give one example of a transmissible disease.

Diseases and immunity

What is a disease-causing organism known as?

Diseases and immunity

The diagram illustrates several animal cells as they appear under a microscope. What would be found at X?

Cell structure

The diagram illustrates part of the human gas exchange system. In which location does the exchange of gases between air and blood occur?

Gas exchange in humans

Which of the following statements about aerobic respiration are correct?

Aerobic respiration

The diagram illustrates several organs in the human body. In which organ are amino acids broken down to produce urea?

Excretion in humans

What does the term synapse mean?

Coordination and response

The diagram shows the skin. Which labelled structure secretes sweat?

Excretion in humans

The diagram illustrates a plant shoot growing towards light. Which response is displayed by the plant shoot?

Tropic responses

Which statement about microorganisms is accurate?

Features of organisms

Which line correctly states the kind of plant reproduction that depends on pollination?

Sexual reproduction in plants

The diagram illustrates one half of a flower. Which structure is the stigma?

Sexual reproduction in plants

A standard menstrual cycle lasts $28$ days, and day $1$ marks the beginning of menstruation. On which day is the lining of the uterus at its thickest?

Sex hormones in humans

The diagram depicts an animal. Which animal is it? 1 animal with a vertebral column ................................ vertebrate animal with an exoskeleton ................................ go to 2 2 no distinct head, thorax and abdomen ........................ A distinct head, thorax and abdomen ........................ go to 3 3 eye takes up less than one third of the head ................. B eye takes up more than one third of the head ................. go to 4 4 wings are wider than their length .......................... C wings are longer than their width .......................... D

Concept and uses of classification systems

The diagram illustrates four kinds of birth control device. Which one is not a barrier method of contraception?

Sexual reproduction in humans

The diagram illustrates the formation of a human fertilised egg cell that develops into a male. Which row shows the sex chromosomes in the cells?

Chromosomes, genes and proteins

Which of the following statements about mitosis are correct?

Mitosis

The graph displays the masses of two different kinds of tomato. What conclusion can be drawn from the graph?

Variation

Which one of these is an example of a population?

Populations

The diagram illustrates a food chain in a rock pool. $\text{seaweed} \rightarrow \text{whelks} \rightarrow \text{crabs} \rightarrow \text{seagulls}$ What occurs if the number of secondary consumers rises? The result will be

Food chains and food webs

The diagram illustrates part of the carbon cycle. At which labelled stages does respiration take place?

Nutrient cycles

The graph illustrates how the predator and prey populations vary over time. Which point on the graph indicates a fall in predator population?

Populations

Which of the following is a reason for using bacteria in biotechnology?

Biotechnology

For what reason is yeast used in breadmaking?

Anaerobic respiration

The diagram illustrates a cross-section of a root. What levels of organisation are shown by the labelled structures?

Characteristics of living organisms

The graph illustrates the amounts of dissolved oxygen and mineral ions in a river. At which point does raw sewage flow into the river?

Pollution

Which features are true of both osmosis and diffusion?

Diffusion

The table presents the results of some food tests. Which row indicates a food that contains both protein and starch?

Biological molecules

The diagrams illustrate an experiment investigating enzyme activity. The test-tubes contain hydrogen peroxide and the enzyme catalase. In which test-tube is the enzyme inactive?

Enzymes

Four test-tubes are arranged as shown in the diagram. After one hour, which test-tube has the greatest amount of carbon dioxide?

Respiration

The diagram shows a transverse section of a leaf. Which tissue does the cell labelled X belong to?

Leaf structure

What characteristic is shown by all living organisms?

Characteristics of living organisms

The nutrient ions found in four different soils are shown. Which soil would be most suitable for growing healthy, green plants?

Xylem and phloem

Which takes place during digestion?

Digestive system

Through which process does water leave the leaves via the stomata?

Transpiration

What kind of tooth is shown in the diagram?

Physical digestion

Which statement gives a description of assimilation?

Absorption

The diagram illustrates a cross-section through a plant stem. What function does the tissue labelled V carry out?

Xylem and phloem

A strip of blue cobalt(II) chloride paper is attached to the underside of a fresh leaf and then enclosed with plastic, as illustrated. A few minutes later, part of the paper changes to pink, indicating that water is present. Which process in leaves causes the paper to become pink?

Transpiration

Which chamber of the heart has the thickest muscular wall?

Heart

Which blood component carries the greatest amount of oxygen?

Blood

Which is one function of certain white blood cells?

Blood

The diagram displays several animal cells as observed using a microscope. What would be found at X?

Cell structure

The diagram illustrates part of the human gas exchange system. In which location does gas exchange between air and blood occur?

Gas exchange in humans

The diagram illustrates substances entering and leaving a living cell. Which process is occurring in this cell?

Diffusion

The diagram illustrates several organs in the human body. In which organ are amino acids broken down to produce urea?

Excretion in humans

The diagram illustrates a reflex arc. What does X represent?

Coordination and response

The diagram represents the skin. Which labelled region contains fatty tissue?

Features of organisms

The diagram shows a seedling placed in a pot filled with soil. Which diagram shows what will be seen after five days?

Tropic responses

Which disease may result from smoking tobacco?

Diseases and immunity

The diagram depicts a spider plant with a daughter spider plant growing from it. Which statement is right?

Asexual reproduction

The diagram shows one half of a flower. Which part shown is the stigma?

Sexual reproduction in plants

The diagram illustrates the human male reproductive system. What is structure X?

Sexual reproduction in humans

Which feature do insects and arachnids both share?

Features of organisms

Which hormone helps to develop and regulate male secondary sexual characteristics?

Sex hormones in humans

What is formed when a cell goes through mitosis once?

Mitosis

The diagram illustrates four cells. Which cell is formed by meiosis?

Meiosis

The graph presents the masses of two distinct types of tomato. What conclusion can be drawn from the graph?

Variation

A female guinea pig that was pure-breeding for white fur was mated with a male guinea pig that was pure-breeding for brown fur. Every offspring had brown fur. One of the male offspring was then mated with a female with white fur. What proportion of white offspring would be expected from this cross?

Monohybrid inheritance

The diagram illustrates a food web. Which two organisms in this web are both carnivores?

Food chains and food webs

By feeding on dead organic matter, fungi can function as decomposers. Which statement describes how this affects the carbon cycle?

Nutrient cycles

The graph shows how the populations of predator and prey change over time. Which point on the graph indicates a fall in predator population?

Populations

A crop plant has been genetically modified so that it is resistant to herbicides. Which of the following could be a possible disadvantage of introducing this new crop plant?

Genetic modification

What is the purpose of using yeast in breadmaking?

Anaerobic respiration

The diagram shows a cross-section of a root. What are the levels of organisation of the labelled structures?

Characteristics of living organisms

The graph illustrates the levels of dissolved oxygen and mineral ions in a river. At what point does raw sewage enter the river?

Pollution

Which of these characteristics apply to both osmosis and diffusion?

Diffusion

Which substances are formed when only glucose molecules are joined together?

Biological molecules

Which of the following statements about enzymes is correct?

Enzymes

Four test-tubes are arranged as shown. After one hour, which test-tube has the highest carbon dioxide concentration?

Aerobic respiration

The diagram shows a transverse section of a leaf. What is the cell labelled X?

Leaf structure

Which characteristic is displayed by all living organisms?

Characteristics of living organisms

Which mineral ion is taken up by plant roots and used to make all amino acids?

Xylem and phloem

By what route does water move as it passes through a plant?

Water uptake

What is the principal source of fibre in a human diet?

Diet

The diagram shows a person’s teeth. Some teeth are absent. What would this person have difficulty doing?

Physical digestion

What roles does the hydrochloric acid in gastric juice play?

Chemical digestion

The diagrams illustrate transverse sections of a root and a leaf. Which option correctly identifies the phloem?

Xylem and phloem

A strip of blue cobalt(II) chloride paper is fastened to the underside of a fresh leaf and then enclosed with plastic. After a few minutes, part of the paper becomes pink, which shows that water is present. Which process carried out by leaves makes the paper turn pink?

Transpiration

The diagram displays the outer surface of a human heart. Which vessel is a coronary artery?

Blood vessels

Which of the blood vessels that carry these substances is an artery?

Blood vessels

Which chemical barrier is part of the body's defence system?

Diseases and immunity

The diagram depicts several animal cells as they appear under the microscope. What will be found at X?

Cell structure

The diagram illustrates part of the human gas exchange system. In which structure does gas exchange between air and blood occur?

Gas exchange in humans

Which equation shows anaerobic respiration in humans?

Anaerobic respiration

The diagram shows several organs in the human body. In which organ are amino acids broken down to produce urea?

Excretion in humans

Which part of the eye is sensitive to light?

Sense organs

Which response takes place when body temperature increases?

Homeostasis

What does the term phototropism mean?

Tropic responses

Which row indicates the effects of excessive alcohol consumption?

Drugs

Which statement is correct for sexual reproduction?

Sexual reproduction

The diagram depicts half of a flower. Which structure is the stigma?

Sexual reproduction in plants

The diagram illustrates the human female reproductive system. What is structure X?

Sexual reproduction in humans

The diagram depicts an animal. Use the key to identify which animal is shown in the diagram.

Concept and uses of classification systems

Which method of birth control is a barrier method?

Sexual reproduction in humans

What do genes encode?

Chromosomes, genes and proteins

What are the roles of meiosis and mitosis?

Mitosis

The graph displays the masses of two different varieties of tomato. What conclusion can be drawn from the graph?

Variation

Extensive areas of forest are felled so that the land can be cleared for alternative uses. What effect does this have on the atmosphere?

Habitat destruction

The diagram illustrates a section of a food web in a heap of dead leaves. Which terms in the table are used to describe the organisms?

Food chains and food webs

The diagram illustrates a section of the water cycle. Which processes are S and T?

Nutrient cycles

The graph illustrates how the populations of predator and prey vary over time. Which point on the graph indicates a fall in predator population?

Populations

Which one gives an example of genetic engineering?

Genetic modification

Why is yeast used in breadmaking?

Anaerobic respiration

The diagram shows a cross-section of a root. What are the levels of organisation of the labelled structures?

Characteristics of living organisms

The graph illustrates the amounts of dissolved oxygen and mineral ions in a river. At what point does raw sewage enter the river?

Pollution

What characteristics apply to both osmosis and diffusion?

Diffusion

Which test is correct for protein?

Biological molecules

The diagram illustrates an enzyme-controlled reaction. What is shown by the enzyme?

Enzymes

Four test-tubes are arranged as shown. Which test-tube has the greatest amount of carbon dioxide after one hour?

Respiration

The diagrams illustrate the structure of four distinct cells taken from the leaf of a dicotyledonous plant. Which one is a guard cell?

Leaf structure