1. All living things are made up of basic units called….. A nucleus B cells C cytoplasm D nucleoplasm 2. Diagram 1 shows an animal cell.
What is the structure labeled X? A Nucleus B Golgi lgi appara parattus C Mit Mitocho chondrio rion D Rough Rough endop endoplas lasmic mic reticu reticulu lum m
3. Which of the following cellular components is not found in an animal cell?
A
C
B
D
4. Which of the following organelles is covered with ribosomes on its outer surface? A Smoo Smooth th endo endopl plas asmi mic c reti reticu culu lum m B Rough end endoplasmi asmic c re reticul iculu um C Golgi apparatus D Mitochondria
5. Diagram 3 shows an organism
The organism shown above reproduces by… I. Forming spores II. budding III. binary fission IV. regeneration A. I and II B I and III C II and IV D II, III, and and IV
6. What are the main functions of the nervous system? I. detects stimuli II. transmit nerve impulses and and integrates the activities of other systems III. controls the physiological processors in conjunction with the endocrine system IV. regulates the osmotic balance of the blood A II and I B III and II C I, II and III D I, II, III and IV
7. • •
Defends the body against infection Returns excess tissue fluid to the blood
The above statement refers to the … A endocrine system B lymphatic system C muscular system D excretory system 8. Which of the following are the physical factors that affect the internal environment of organisms I temperature II blood pressure III osmotic pressure IV pH A I and II B II and IV C I, II and III D II, III and IV
9. Which of the following is not a plant organ? A Leaves B Stems C Xylems D Flowers 10. What will happen if plants do not have cell walls? A Unwanted substances would enter the cell. B Plant cells would lose their shape and rigidity. C Useful substances would flow out of the cell. D Activities of the cell cannot be carried out.
11. Diagram below shows the structure of a plasma membrane based on the fluid mosaic model.
What is X and Y? X A Lipid B Protein C Protein D Phospholipid
Y Protein Lipid Phospholipid Protein
12. Which of the following processes involve diffusion? I The intake of oxygen into the alveolus II The absorbtion of glucose and amino acids by cells in the villi of the small intestine. III The absorbtion og digested food through the villi of the small intestine. IV The intake of mineral ions by the root hairs of a plant. A I and II only B I and III only C I, III and IV only D I, II, III and IV
13. Which of the following processes is involved in the transport of sodium ions against the concentration gradient? A Osmosis B Active transport C Simple diffusion D Facilitated diffusion
14. Which of the following molecules move across the plasma membrane by simple diffusion? I Water II Oxygen III Starch IV Carbon dioxide A I and II only B I, II and IV only C II, III and IV only D I, II, III and IV 15. An experiment is carried to study the movement of substances across the Visking tubing. The result of the Benedict’s test and the iodine test at the beginning and at the end of the experiment are shown in table in below.
Test Benedict’s test Iodine test
Colour of the liquid in boiling tube Beginning of experiment End of experiment Blue solution Brick red precipitate Brown solution
Brown solution
What inference can be made from the experiment? A The Visking tubing is permeable to glucose molecules. B The Visking tubing is permeable to starch molecules. C The Visking tubing is permeable to both glucose and starch. D The Visking tubing is not permeable to glucose and starch molecules. 16. Which of the following processes involves active transport? A Uptake of icons by root hair cells of a plant B Absorption of digested food in the villus C Absorption of water by root hair cells of a plant D Gaseous exchange between the alveoli and the blood capillaries.
17. Diagram 7 shows the structure of a plant cell before and after it has been immersed in solution P.
What is solution P and the process that takes place in the plant cell? Solution P
Process
A
Distilled water
Plasmolysis
B
Distilled water
Deplasmolysis
C
10% sucrose solution 15% sucrose solution
Plasmolysis
D
Haemolysis
18. The diagram shows a strip of a mustard green after it has been immersed in solution Z.
Which of the following is solution Z? A 0.1% salt solution B distilled water C 1.5% sucrose solution D 30% sucrose solution
19. A piece of an onion epidermis is placed in 30% sucrose solution. Which of the following shows the shape of the cells after 30 minutes.
A
B
C
D
20. Which of the following correctly describes the effects of excessive use of chemical fertilisers? I the soil solution becomes hypertonic II the roots cells become flaccid III the plasma membrane of the root cells are destroyed IV Causes wilting in plant A II and IV only B I.II,ang IV only C II,III,and IV only D I,II,III,and IV 21.Which of the following substance acts as a medium for biochemical reactions in a cell? A Water B Lipid C Glucose D Amino acid
22.The diagram shows the structure of a nucleotide.
What are represented by the units labeled as X, Y and Z? X Y Z Phosphate Nitrogenous Sugar group base Phosphate Sugar Nitrogenous group base Sugar Phosphate Nitrogenous group base Nitrogenous Sugar Phosphate base group
23.Which of the following carbohydrates are examples of polysaccharides? I Starch II Lactose III Glycogen IV Cellulose A I, II and III only B I, III and IV only C II, III and IV only D I, II, III and IV
24.Which of the following carbohydrates has a structure as shown in the diagram?
A Starch B Glycogen C Galactose D Cellulose
25. Which of the following have the structure of a protein as shown in the diagram?
I Enzymes II Antibodies III Cholesterol IV Haemoglobin A I and II only B I, II and IV only C II, III and IV only D I, II, III and IV
26. Which
of the following statements about protein is not true?
A The monomer of protein is amino acid. B Non-essential amino acids cannot be synthesized in humans C The linear sequence of amino acids in protein molecule is called the primary structure D An example of a quartenary-structured proteins in haemoglobin
27. The
main types of lipids are listed below, except…
A oils
B steroids C hormones D phospholipids.
28.The diagram shows a structure of one lipid molecule
The part labeled Q represents A phosphate B glycerol C fatty acid D amino acid
29.The diagram shows the mechanism of an enzyme reaction on a substance
What conclusion can be made about the characteristics of an enzyme? I An enzyme reaction is very specific II An enzyme reaction is affected by temperature III An enzyme speeds up the rate of chemical reaction. IV An enzyme remains unchanged at the end of the reaction. A I and IV only B II and IV only C I, III and IV only D I, II, III and IV 30.Which of the following graphs shows the effect of temperature on the rate of an enzyme-catalysed reaction?
31.The diagram shows a stage in a cell division
This stage of cell division is A metaphase B anaphase I C anaphase D metaphase I 32.Which of the following shows the correct sequence for cell division? I G2 II G1 III M IV S A I, II, III IV B II, IV, I, III C I, II, IV, III D II, III, IV, I 33. Arrange the diagrams in the right sequence for mitosis.
A B C D
IV, III, I, II I, IV, II, III III, II, I, IV II, I, IV, III
34.Which of the following cells shows the cell at the mitotic metaphase stage?
35.The figure shows the stages of division by mitosis
Which of the following shows the correct sequence of the events? A S, Q, P, R B R, Q, P, S C Q, P, S, R D P, Q, R, S 36.All somatic cells that are diploid originate from the A gamete B autosome C chiasma D zygote
37.The diagram shows a phase in nuclear division
What is this phase? A prophase B anaphase C metaphase D telophase 38.Which of the following statements are true about mitosis? I produces two daughter cells that are diploid II daughter cells are the same genetically as the parent cell III chromatid pairs separate during the anaphase stage IV homologous chromosomes undergo synapsis during the prophase stage. A I and II only B II and IV only C I, II and III only D II, III and IV only 39. Which of the following substances may bring harm to the process of mitosis and meiosis? I X-ray II Fungicides III Benzene IV Mustard gas A I and III only B II and IV only C I, II and IV only D I, II, III and IV
40. The diagram shows an animal cell at one of the stages in meiosis.
Which of the following is the number of chromosomes in the daughter cells after the division? A n = 2 B n=4 C n=8 D n = 16 41. The following statements are about an organelle of a cell. •
Exists freely in the cytoplasm or is attached to the rough endoplasmic reticulum.
•
Site of the protein synthesis
What is the organelle? A Vacuole
C Golgi body
B Nucleus
D Ribosome
42. The diagram shows the liquid composition of the human body.
Which of the following form the internal environment? A P, Q, R
C P, R, S
B Q, R, S
D P, Q, S
43. Which of the following is a connective tissue?
A
C
B
D
44.
What are the processes involved in the movement of water and mineral ions into root hairs?
Water
45
Mineral ions
A.
Facilitated diffusion
Osmosis
D.
Active transport
Osmosis
C.
Osmosis
Active transport
D.
Osmosis
Facilitated diffusion
Which of the following onion cells were immersed in a hypotonic solution?
46.
The graph shows the changes in mass of potato strips immersed in different concentrations of sucrose solution.
Based on the above graph which of the following concentrations of sucrose solution should be used so that a flaccid potato strip regains its turgidity?
47
A 1.5 g per 100 ml
C 3.5 g per 100 ml
B 2.5 g per 100 ml
D 4.5 g per 100 ml
A plant cell is immersed in distilled water. Which of the following is true about the movement of the water molecules in the early stage ? A
No water molecules are entering or exiting the cell
B. The rate of water molecules entering and exiting the cell is the same C. The rate of water molecules entering the cell is higher than exiting the cell D. The rate of water molecules exiting the cell is higher than entering the cell
48
The diagram shows the molecular structure of three food classes.
Which food classes do X, Y and Z belong to? X
Y
Z
A
Carbohydrate
Protein
Lipid
B
Protein
Carbohydrate Lipid
C
Protein
Lipid
D
Lipid
Carbohydrate Protein
Carbohydrate
49.
Diagram below shows the rate of enzyme hydrolysis reaction, R and S in the human body.
Which of the following is true about enzymes R and S?
50
A B
Enzyme R Secreted in the stomach The active site changes at pH
Enzyme S Secreted into the duodenum The active site changes at pH
C D
more than 4 R is trypsin Synthesized in the rough in the
more than 7 S is lipase Synthesized in the smooth
endoplasmic reticulum
endoplasmic reticulum
The diagram below shows the breaking down of complex molecules by an enzyme. Which of the molecules A, B, C and D represents the substrate?
Answer scheme 1.
B
11.
D
21.
A
31.
C
41.
D
2.
B
12.
B
22.
B
32
B
42.
C
3.
D
13
B
23.
B
33.
C
43.
A
4.
B
14.
B
24.
A
34.
B
44.
C
5.
B
15.
A
25.
A
35.
A
45.
A
6.
C
16.
A
26.
B
36.
D
46.
A
7.
B
17.
B
27.
C
37.
C
47.
C
8.
C
18.
D
28.
B
38.
C
48.
B
9.
C
19.
D
29.
A
39.
D
49.
A
10.
B
20.
B
30.
B
40.
A
50.
B
