Cambridge IGCSE Biology (9-1) 0970 — 2023 May/June Paper 1 · Variant 2

Question 1

1 Living animals release carbon dioxide. This is an example of which life process? A excretion B movement C nutrition D sensitivity

Accepted Answer

A

Question 2

2 Some statements about species are given. 1 Members of a species all look identical. 2 Members of a species belong to the same genus. 3 Members of a species can produce fertile offspring. 4 Species are named using an international system. Which statements are correct? A 1, 2, 3 and 4 B 1, 2 and 3 only C 2 and 4 only D 2, 3 and 4 only

Accepted Answer

D

Question 3

3 The table shows some features of different animals.

Which animal is a reptile?

wings hair scales

x x v

0 OW >
x < x

x x
v x
x v

Accepted Answer

A

Question 4

4 Which structures are found in the cells of all living organisms? 1 cell membrane 2 chloroplast 3 cytoplasm A 1, 2 and 3 B 1 and 2 only C 1 and 3 only D 2 and 3 only

Accepted Answer

C

Question 5

5 A diagram of a human red blood cell is shown. The length of line XY on the diagram is 40 mm. The actual width of the cell is 0.008 mm. X Y What is the magnification of the diagram? A ×500 B ×5000 C ×50 000 D ×500 000

Accepted Answer

B

Question 6

6 Which statements are correct for both diffusion and osmosis?

involves requires ener molecules move from
movement of q nergy higher concentration to
from respiration ;
water only lower concentration

A v v v key
B Jv Jv x v= yes
Cc x x v X =no
D x x x

Accepted Answer

C

Question 7

7 What is a role of water in digestion? A It is an enzyme. B It is a solvent. C It is soluble. D It is a mineral.

Accepted Answer

B

Question 8

8 The concentration of sodium ions in the soil is lower than the concentration inside root hair cells. Which process will be used when sodium ions are taken into root hair cells from the soil? A active transport B diffusion C osmosis D transpiration

Accepted Answer

A

Question 9

9 The diagram represents a protein molecule. What do the small circles represent? A amino acids B fatty acids C glycerol D simple sugars

Accepted Answer

A

Question 10

10 Which processes depend on the action of enzymes? 1 digestion 2 osmosis 3 respiration A 1 and 2 B 1 and 3 C 1 only D 2 and 3

Accepted Answer

B

Question 11

11 Which diagram of an enzyme, active site and substrate is correct? A B substrate enzyme enzyme active site active site substrate C D substrate enzyme enzyme active site active site substrate

Accepted Answer

C

Question 12

12 Four test-tubes are set up as shown. Which test-tube contains the least carbon dioxide after one hour? A B C D black water polythene to keep aquatic out light animal light light light aquatic plant

Accepted Answer

C

Question 13

13 Which row shows the uses of some carbohydrates in plants? glucose starch sucrose A cell walls transport energy storage B energy storage cell walls respiration C respiration energy storage transport D transport respiration cell walls

Accepted Answer

C

Question 14

14 The lack of which component of a balanced diet will lead to the development of scurvy? A calcium B iron C vitamin C D vitamin D

Accepted Answer

C

Question 15

15 Which structure is the duodenum? D A C B

Accepted Answer

C

Question 16

16 The food label is from a packet of cereal. The label can help someone who is concerned about their diet. Nutrition Typical values 100 g contains Energy 985 kJ 235 kcal Fat 1.5 g of which saturates 0.3 g Carbohydrate 45.5 g of which sugars 3.8 g Fibre 2.8 g Protein 7.7 g Salt 0.5 g A person eats 45 g of cereal. One of the food types listed in the label can help prevent constipation. How many grams of this food type does the person eat? A 1.3 g B 2.8 g C 3.5 g D 7.7 g

Accepted Answer

A

Question 17

17 Which pathway is taken by water through a plant? A root hair → root cortex → xylem → mesophyll → stomata B root hair → xylem → mesophyll → root cortex → stomata C stomata → root cortex → xylem → mesophyll → root hair D stomata → root hair → root cortex → xylem → mesophyll

Accepted Answer

A

Question 18

18 Which row shows the transpiration rate for the conditions described? atmospheric transpiration wind speed temperature rate A low low fast B high high slow C low high slow D low low slow

Accepted Answer

D

Question 19

19 The diagram shows the human heart. Which label shows the left ventricle? D A B C

Accepted Answer

B

Question 20

20 Which row shows the features of an artery or a vein? diameter thickness blood vessel of lumen of wall A artery large thick B artery small thin C vein large thin D vein small thick

Accepted Answer

C

Question 21

21 What are features of gas exchange surfaces in animals? A thick-walled and large surface area B thick-walled and small surface area C thin-walled and small surface area D thin-walled and large surface area

Accepted Answer

D

Question 22

22 Which chemical can be used to show the presence of carbon dioxide gas? A Benedict’s solution B biuret solution C ethanol D limewater

Accepted Answer

D

Question 23

23 The diagram represents the exchange of gases during breathing and during respiration in the body. oxygen oxygen in blood X Y carbon carbon dioxide dioxide in blood What is represented by X? A heart B kidneys C liver D lungs

Accepted Answer

D

Question 24

24 Which molecule is produced by anaerobic respiration in yeast? A carbon dioxide B lactic acid C oxygen D water

Accepted Answer

A

Question 25

25 The diagram shows the human body and some of its organs. Which structure removes urea from the blood? A B C D

Accepted Answer

C

Question 26

26 The diagram shows the structures in a reflex arc. X receptor muscle What is X? A effector B relay neurone C sensory neurone D synapse

Accepted Answer

B

Question 27

27 Changes in light intensity cause changes in the diameter of the pupil in the eye. Which rows show the pupil reflex? light intensity pupil diameter 1 high increases 2 high decreases 3 low increases 4 low decreases A 1 and 3 B 1 and 4 C 2 and 3 D 2 and 4

Accepted Answer

C

Question 28

28 A hormone is injected into a person to reduce their blood glucose concentration. Which endocrine gland is not functioning properly in a person who needs to have this injection? A adrenal gland B ovary C pancreas D testis

Accepted Answer

C

Question 29

29 The table shows which antibiotics are effective against different types of bacteria. The shaded areas show the antibiotic is effective against that type of bacteria. type of bacteria antibiotic MRSA Streptococcus Pseudomonas Anaerobes 1 2 3 4 5 6 A person has a disease caused by a type of Streptococcus bacteria and a second infection caused by a type of Pseudomonas bacteria. Which antibiotic should be taken? A 1 or 6 B 2 or 4 C 3 or 4 D 5 or 6

Accepted Answer

B

Question 30

30 The diagram shows one way that a plant can reproduce. What is a feature of this type of reproduction? A The offspring show genetic variation. B Only one parent is required. C Offspring are easily dispersed over a wide area. D Pollination by insects is required.

Accepted Answer

B

Question 31

31

Which human characteristics are inherited?

0 0O WwW >

blood
group

Ko 4

eye
colour

~ KOK

language

\ & \& x

Sex

Q 48M

key
J = inherited

X = not inherited

Accepted Answer

A

Question 32

32 In a sperm cell, which structure contains enzymes that can digest the jelly coat of an egg cell? A acrosome B flagellum C mitochondria D nucleus

Accepted Answer

A

Question 33

33 When breeding, which pair of parents will be pure-breeding for a particular characteristic? A a heterozygous and a homozygous individual B two heterozygous individuals C two homozygous individuals D two individuals with the same phenotype

Accepted Answer

C

Question 34

34 In a pea plant, the allele for round seeds, R, is dominant to the allele for wrinkled seeds, r. If plants with the genotype Rr are crossed, what are the likely proportions of offspring? A all with round seeds B all with wrinkled seeds C 1 with round seeds : 1 with wrinkled seeds D 3 with round seeds : 1 with wrinkled seeds

Accepted Answer

D

Question 35

35 Which definition of continuous variation is correct? A variation that results in a limited number of phenotypes between two extremes B variation that results in a limited number of phenotypes with no intermediates C variation that results in a range of phenotypes between two extremes D variation that results in a range of phenotypes with no intermediates

Accepted Answer

C

Question 36

36 Which term is used to describe an organism that makes its own organic nutrients? A carnivore B decomposer C herbivore D producer

Accepted Answer

D

Question 37

37 What is the principal source of energy for most food chains? A carbon dioxide gas B glucose C oxygen D sunlight

Accepted Answer

D

Question 38

38 A single tree is food for a large population of caterpillars. Several small birds eat the caterpillars. The small birds are eaten by a bird of prey. Which is the pyramid of biomass? A B C D

Accepted Answer

A

Question 39

39 The diagram shows the results of a survey on the types of animals found along a stretch of river near to a factory. direction of water flow mayfly nymph stonefly nymph factory emptying pollutants into the water rat-tailed maggot bloodworm sludge worm leech bloodworm water louse snail shrimp caddisfly larva mayfly nymph stonefly nymph Which animal lives in the least polluted water? A bloodworm B caddisfly larva C leech D stonefly nymph

Accepted Answer

D

Question 40

40 Bacteria are useful for manufacturing products for human use. Which statement explains why they are useful? A Bacteria can be grown without nutrients. B Bacteria do not have a nucleus. C Bacteria infect human cells. D Bacteria reproduce very rapidly.

Accepted Answer

D

Question paper16 pages

Mark scheme3 pages

Questions as text

Q1 · Living animals release carbon dioxide

Q2 · Some statements about species are given

Q3 · The table shows some features of different animals

Q4 · Which structures are found in the cells of all living organisms?

Q5 · A diagram of a human red blood cell is shown

Q6 · Which statements are correct for both diffusion and osmosis?

Q7 · What is a role of water in digestion?

Q8 · The concentration of sodium ions in the soil is lower than the concentration inside root…

Q9 · The diagram represents a protein molecule

Q10 · Which processes depend on the action of enzymes?

Q11 · Which diagram of an enzyme, active site and substrate is correct?

Q12 · Four test-tubes are set up as shown

Q13 · Which row shows the uses of some carbohydrates in plants?

Q14 · The lack of which component of a balanced diet will lead to the development of scurvy?

Q15 · Which structure is the duodenum?

Q16 · The food label is from a packet of cereal

Q17 · Which pathway is taken by water through a plant?

Q18 · Which row shows the transpiration rate for the conditions described?

Q19 · The diagram shows the human heart

Q20 · Which row shows the features of an artery or a vein?

Q21 · What are features of gas exchange surfaces in animals?

Q22 · Which chemical can be used to show the presence of carbon dioxide gas?

Q23 · The diagram represents the exchange of gases during breathing and during respiration in…

Q24 · Which molecule is produced by anaerobic respiration in yeast?

Q25 · The diagram shows the human body and some of its organs

Q26 · The diagram shows the structures in a reflex arc

Q27 · Changes in light intensity cause changes in the diameter of the pupil in the eye

Q28 · A hormone is injected into a person to reduce their blood glucose concentration

Q29 · The table shows which antibiotics are effective against different types of bacteria

Q30 · The diagram shows one way that a plant can reproduce

Q31 · Which human characteristics are inherited?

Q32 · In a sperm cell, which structure contains enzymes that can digest the jelly coat of an…

Q33 · When breeding, which pair of parents will be pure-breeding for a particular…

Q34 · In a pea plant, the allele for round seeds, R, is dominant to the allele for wrinkled…

Q35 · Which definition of continuous variation is correct?

Q36 · Which term is used to describe an organism that makes its own organic nutrients?

Q37 · What is the principal source of energy for most food chains?

Q38 · A single tree is food for a large population of caterpillars

Q39 · The diagram shows the results of a survey on the types of animals found along a stretch…

Q40 · Bacteria are useful for manufacturing products for human use

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