Which of the following does a virus have in common with animal cells?
Trả lời
(B)
DNA
2
Which of the following organelles are likely to be present in cells that are actively respiring and photosynthesizing?
Trả lời
(B)
Mitochondria and chloroplast
3
One common characteristic of fungi, algae, mosses and ferns is that they
Trả lời
(C)
produce spores that are dispersed
4
Protein-like bodies are borne on the part labelled
Trả lời
(A)
II
5
The sexual reproductive function is performed by the part labelled
Trả lời
(D)
V
6
Which of the following is transmitted through mosquito bite?
Trả lời
(A)
Filariasis
7
Which of the following insects lays its eggs in horny, purse-like cases?
Trả lời
(D)
Cockroach
8
Which of the following vertebrates does the skin function as a respiratory surface?
Trả lời
(D)
Frog
9
Birds maintain their body temperature with the help of their
Trả lời
(B)
feathers which cover the body
10
Secondary thickening in dicotyledonous stem is controlled by the
Trả lời
(C)
cambium
11
2H2 → 2H2 + O2(g). The equation above represents a part of the light stage of photosynthesis. Which of the following must be presents for this reaction to occur?
Trả lời
(C)
Light energy and cholorphyll
12
In an experiment to investigate the effect of nitrogen on the growth of plants, the substrate should be a medium of
Trả lời
(C)
cow dung
13
Which vitamin plays an important role in blood clotting?
Trả lời
(B)
Vitamin K
14
The mammalian organ which acts both as a digestive and as an endocrine organ is the
Trả lời
(C)
pancreas
15
Which of following is NOT involved in the transport of substance in the body?
Trả lời
(C)
Leucocytes
16
The end product of glycolysis in plants and animals is
Trả lời
(A)
pyruvic acid
17
During respiration, air circulates round plant tissues via the
Trả lời
(D)
intercellular spaces
18
The excretory structure in the earthworm is the
Trả lời
(C)
nephridium
19
During the bending of the arm, the biceps muscles
Trả lời
(A)
contracts and the triceps muscles relaxes
20
When a healthy shoot of a flowering plant is illuminated from one side, auxins, accumulate on the
Trả lời
(A)
non-illuminated side of the shoot
21
The type of placentaion shown is
Trả lời
(C)
parietal
22
An example of a plant having the placentation shown is
Trả lời
(D)
pride of Barbados
23
The term caryopsis is used to describe a fruit in which the
Trả lời
(C)
testa and pericarp are fused
24
The sex of a foetus is determined during
Trả lời
(C)
fertilization
25
Biological growth refers strictly to an increase in the
Trả lời
(A)
protoplasm of an organism
26
The process of walking is under the control of the part of the brain called
Trả lời
(C)
cerebellum
27
The gland directly affecting metabolic rate, growth and development is known as
Trả lời
(B)
thyroid gland
28
Which of the following ions is involved in the conduction of the nerve impulse?
Trả lời
(B)
K+
29
The depth of illumination in a water body can be measured with a
Trả lời
(B)
secchi disc
30
In a food chain involving a primary producer, a primary consumer as well as a secondary consumer, the sharing of trophic energy is in the form that the
Trả lời
(D)
secondary consumer gets only a small portion of the energy contained in the primary producer
31
In spite of the removal of carbondioxide from the atmosphere, its amount remains more or less constant because
Trả lời
(B)
it is produced during respiration of animals
32
In a tropical rain forest, non-epiphytic ferns and allies occur as
Trả lời
(C)
shade-loving species
33
Colonization of a bare rock surface is termed
Trả lời
(C)
primary succession
34
Which of the following is a measure for the control of bilharzia?
Trả lời
(B)
Application of molluscicides in water bodies
35
Some of the diseases caused by bacteria are
Trả lời
(A)
tuberculosis, gonorrhoea and syphilis
36
Environmental pollutants which can work through the media of water, soil and air include
Trả lời
(C)
sulphur(IV)oxide
37
Human height is an example of a feature which depends on both
Trả lời
(B)
genetic and environmental factors
38
A person with type O blood can donate to a patient with type A because the donor's blood
Trả lời
(A)
lacks antigens
39
The DNA molecule is a chain of repeating
Trả lời
(D)
nucleotides
40
The specific number of chromosomes in each somatic cell is represented by
Trả lời
(C)
2N
41
A man with blood group a is married to a woman with blood group A. Which of the following group combinations is possible if the family has three children?
Trả lời
(D)
A, O, A
42
The F1 of a cross between a tall and a dwarf plant was tall. The F1 was advanced to F2. How many of 120F2 plants will be dwarf?
Trả lời
(A)
30
43
All the sons of a colour-blind woman will be coloured blind regardless of the state of the father because
Trả lời
(D)
sex-linked traits express dominance in females
44
The slender, long and slightly curved beak of the sun-bird is an adaptation for breeding for feeding on
