1.	Which is the structure of glycerol?

(Total 1 mark)
2.	Aerobic respiration involves conversion of glucose into pyruvate and conversion of pyruvate into carbon dioxide and water. Where do these processes occur in a eukaryotic cell?
	Where glucose is broken down
into pyruvate	Where pyruvate is broken down
into carbon dioxide and water	
A.	Cytoplasm	Cytoplasm	
B.	Cytoplasm	Mitochondrion	
C.	Mitochondrion	Cytoplasm	
D.	Mitochondrion	Mitochondrion	
(Total 1 mark)
3.	In the structure of DNA what binds with cytosine?
A.	Deoxyribose
B.	Ribose
C.	Thymine
D.	Adenine
(Total 1 mark)

4.	What would be the effect of increasing temperature on the rate of photosynthesis in a green plant?
A.	It increases constantly.
B.	It increases up to a point and then remains constant.
C.	It increases up to a point and then decreases.
D.	It remains constant.
(Total 1 mark)

5.	The diagram below represents an animal cell.

Which processes occur in the locations labeled?
	Transcription	Translation	Respiration	
A.	II	III	I	
B.	III	II	I	
C.	II	III	IV	
D.	III	II	IV	
(Total 1 mark)
6.	Which molecule is a monosaccharide?
A.	Ribose
B.	Glycogen
C.	Amylase
D.	Glycerol								(Total 1 mark) 
7.	Identify the atoms and ions from the table below.
	Atoms	Ions	
A.	H+	Na+	OH–	Cl–	
B.	Fe	K	CH3COO–	H2O	
C.	Fe	H2O	Ca2+	N3 –	
D.	Na	C	I–	NO3 –	
										(Total 1 mark)
8.	What is responsible for the conservation of the base sequence during DNA replication?
A.	DNA polymerase working on one strand at the same time.
B.	Unpaired bases always attracting their complementary nucleotides.
C.	DNA helicase and polymerase are complementary.
D.	Both strands are identical to each other.					(Total 1 mark)
9.	Which graph shows the effect of increasing carbon dioxide concentration (CO2) on the rate of photosynthesis?
A						B			C				D	

(Total 1 mark) 
10.	Which types of enzyme are found in the human digestive system?
I.	Amylases
II.	Proteases
III.	Lipases
A.	I and II only
B.	I and III only
C.	II and III only
D.	I, II and III
(Total 1 mark)

11.	Which of the following could be a function of a membrane protein?
A.	Energy storage
B.	Enzymatic activity
C.	Oxygen uptake
D.	Thermal insulation
(Total 1 mark)

12.	During the process of replication, which bond(s) in the diagram of DNA below is/are broken?

A.	3
B.	4, 5
C.	1, 2, 6, 7
D.	1, 7, 4, 5									(Total 1 mark)
13.	What is the maximum number of fatty acids that can be condensed with glycerol?
A.	One
B.	Two
C.	Three
D.	Four
(Total 1 mark)
14.	Which row in the table describes the first stage of cellular respiration?
	Substrate	Location	Product	Product	
A.	pyruvate	mitochondria	oxygen	water	
B.	pyruvate	cytoplasm	carbon dioxide	ATP	
C.	glucose	mitochondria	pyruvate	water	
D.	glucose	cytoplasm	pyruvate	ATP	

(Total 1 mark) 
15.	Which substance is a base found in RNA?
A.	Ribose
B.	Thymine
C.	Adenosine
D.	Uracil									(Total 1 mark)
16.	What type of bond holds the complementary base pairs together in a double helix of DNA?
A.	Covalent bonds
B.	Peptide bonds
C.	Glycosidic bonds
D.	Hydrogen bonds							(Total 1 mark) 
17.	What role does iron play in living organisms?
A.	As a component in nucleic acids
B.	As a component of lipids
C.	As a component of carbohydrates
D.	As a component of proteins					(Total 1 mark)

18.	Which diagram correctly illustrates a dipeptide?

(Total 1 mark) 
19.	What are the components of a DNA nucleotide?
A.	Deoxyribose, a phosphate and one of the bases: adenine, cytosine, guanine or thymine
B.	Ribose, a phosphate and one of the bases: adenine, cytosine, guanine or uracil
C.	Deoxyribose, a nitrate and one of the bases: adenine, cytosine, guanine or thymine
D.	Ribose, a nitrate and one of the bases: adenine, cytosine, guanine or thymine  (Total 1 mark)

20.	What is the correct sequence of chemicals produced in the anaerobic respiration pathway?
A.	Lactate → pyruvate → ethanol
B.	Ethanol → pyruvate → glucose
C.	Glucose → lactate → pyruvate
D.	Glucose → pyruvate → lactate						(Total 1 mark)
21.	Why do leaves of plants look green?
A.	Most of the green light is absorbed by chlorophyll and most of the red and blue light is reflected.
B.	Most of the blue light is absorbed by chlorophyll and most of the red and green light is reflected.
C.	Most of the red light is absorbed by chlorophyll and most of the green and blue light is reflected.
D.	Most of the red and blue light is absorbed by chlorophyll and most of the green light is reflected.
(Total 1 mark)
22.	How would the following DNA sequence, ACGTTGCATGGCA, be transcribed?
A.	UGCAACGUACCGU
B.	TGCAACGTACCGT
C.	ACGTTGCATGGCA
D.	ACGUUGCAUGGCA
(Total 1 mark)

23.	What causes water to have a relatively high boiling point?
A.	Hydrogen bonds between water molecules
B.	Hydrogen bonds between hydrogen and oxygen within water molecules
C.	Cohesion between water molecules and the container in which the water is boiled
D.	Covalent bonds between hydrogen and oxygen within water molecules
(Total 1 mark)

24.	Which of the following substances are organic?
	I.	Lipids
II.	Water
III.	Carbon dioxide
A.	I only
B.	II and III only
C.	I and II only
D.	I, II and III
(Total 1 mark)

25.	The diagram below represents DNA replication. Some of the bases are indicated.
	
	In which direction is the replication fork moving and which bases would be needed to replicate the section of DNA shown?
	Direction of movement of replication fork	Bases needed	
A.	Left to right	U, G and C	
B.	Right to left	U, G and C	
C.	Left to right	T, G and C	
D.	Right to left	T, G and C	
(Total 1 mark) 
26.	Where in eukaryotic cells is glucose broken into pyruvate, to release energy for use in the cell?
A.	Chloroplast
B.	Cytoplasm
C.	Mitochondrion
D.	Nucleus
(Total 1 mark)
27.	In the diagram of a chloroplast below where will the Calvin cycle take place?

A.	I
B.	II
C.	III
D.	IV
(Total 1 mark)

28.	Which limiting factor of photosynthesis is shown below?
	
A.	Increasing carbon dioxide concentration
B.	Increasing temperature
C.	Increasing light intensity
D.	Increasing humidity
(Total 1 mark)
29.	Carbon, hydrogen, nitrogen and sulphur are elements found in living cells. Which is the least common?
A.	Carbon
B.	Hydrogen
C.	Nitrogen
D.	Sulphur
(Total 1 mark)
30.	Which of the following terms correctly describe the molecule below?

I.	Monosaccharide
II.	Ribose
III.	Carbohydrate
A.	I only
B.	I and III only
C.	II and III only
D.	I, II and III                                                                 (Total 1 mark)

31.	A certain gene in a bacterium codes for a polypeptide that is 120 amino acids long. How many nucleotides are needed in the mRNA to code for this polypeptide?
A.	30
B.	40
C.	360
D.	480									(Total 1 mark)
32.	What enzyme is used in transcription but not in translation?
A.	DNA polymerase
B.	Helicase
C.	Protease
D.	RNA polymerase								(Total 1 mark)
 
33.	Which two colours of light does chlorophyll absorb most?
A.	Red and yellow
B.	Green and blue
C.	Red and green
D.	Red and blue
(Total 1 mark)

1.	A

2.	B

3.	A

4.	C

5.	C

6.	A

7.	D

8.	B

9.	B

10.	D

11.	B

12.	B

13.	C

14.	D

15.	D

16.	D

17.	D

18.	B

19.	A

20.	D

21.	D

22.	A

23.	A

24.	A

25.	D

26.	B

27.	A

28.	B

29.	D

30.	B

31.	C

32.	D

33.	D