Transcript True - PDST

True or False
Questions from Exam Papers
True or False
RNA is not found in ribosomes.
False
2
True or False
HIV/AIDS has orphaned many children in
sub-Saharan Africa.
True
3
True or False
Single-celled organisms use mitosis for
reproduction.
True
4
True or False
Immobilised enzymes can act as catalysts.
True
5
True or False
All vitamins are fat soluble.
False
6
True or False
The growth response of a plant to light is
phototropism.
True
7
True or False
The liver produces bile.
True
8
True or False
Humans receive oxygen from air they inhale.
True
9
True or False
Light is essential for the germination of seeds.
False
10
True or False
The cells produced by meiosis are haploid.
True
11
True or False
Cloned individuals are exactly the same.
True
12
True or False
A sperm contains the diploid number of
chromosomes.
False
13
True or False
Chromosomes are made of DNA and lipid.
False
14
True or False
Vaccination gives rise to active immunity.
True
15
True or False
Meiosis gives rise to variation.
True
16
True or False
Food chains are usually short.
True
17
True or False
Lactic acid is a product of anaerobic respiration.
True
18
True or False
Organisms of the same species usually produce
fertile offspring.
True
19
True or False
All individuals within a species are the same.
False
20
True or False
Chloroplasts contain DNA.
True
21
True or False
Enzymes are essential for metabolism.
True
22
True or False
Red blood cells have no nucleus.
True
23
True or False
The pacemaker is on the left side of the heart.
False
24
True or False
Motor neurons conduct impulses away from the
CNS.
True
25
True or False
The growth response of a plant to chemicals is
geotropism.
False
26
True or False
Monocotyledonous plants have parallel leaf
veins.
True
27
True or False
Lenses closest to the stage are the eyepiece
lenses.
False
28
True or False
Plant cell walls are fully permeable.
True
29
True or False
A polysaccharide contains many sugar units.
True
30
True or False
Meiosis is never involved in gamete formation.
False
31
True or False
Iodine turns starch to a blue-black colour.
True
32
True or False
Carbon dioxide is produced during respiration.
True
33
True or False
Immobilised enzymes cannot act as catalysts.
False
34
True or False
Bones are joined to other bones by ligaments.
True
35
True or False
Stage 2 of respiration takes place in the
cytoplasm.
False
36
True or False
The cells produced by mitosis are identical.
True
37
True or False
DNA is a double helical shape.
True
38
True or False
Aerobic respiration is the release of energy in
the absence of oxygen.
False
39
True or False
Eggs are a good source of fat in the diet.
True
40
True or False
Chromosomes are found in the nucleus.
True
41
True or False
Stage 1 of respiration requires oxygen.
False
42
True or False
The remaining natural ecosystems are ones for
which we have no use.
True
43
True or False
The base Uracil is found in DNA.
False
44
True or False
Herbivores normally live long lives.
False
45
True or False
Stage 1 of respiration takes place in the
cytoplasm.
True
46
True or False
Lipids are made of amino acids.
False
47
True or False
Mitosis divides a nucleus into two identical
nuclei.
True
48
True or False
Some energy released in respiration is lost as
heat.
True
49
True or False
Osmosis is responsible for uptake of minerals.
False
50
True or False
The products of vegetative propagation are
clones.
True
51
True or False
Urea is formed in the kidneys.
False
52
True or False
Cell membranes are semipermeable.
True
53
True or False
Animal cells do not have membranes.
False
54
True or False
Enzymes are not essential for metabolism.
False
55
True or False
Phloem transports water in plants.
False
56
True or False
A potato is a modified stem.
True
57
True or False
A motor neuron carries impulses to the brain.
False
58
True or False
Glucose is a monosaccharide.
True
59
True or False
Lenticels serve the same function as stomata.
True
60
True or False
Mitosis always produces four new cells.
False
61
True or False
Nitrogen is a trace element.
False
62
True or False
Plant cells have chloroplasts.
True
63
True or False
Tendons attach bone to bone.
False
64
True or False
Endosperm is a food reserve in some seeds.
True
65
True or False
Intraspecies competition is more intense than
interspecies competition.
True
66
True or False
The liver produces bile.
True
67
True or False
Metabolism is the sum of all the chemical
reactions in the body.
True
68
True or False
Anabolism is the breaking down of large
molecules.
False
69
True or False
Nutrition is the way living organisms get rid of
waste.
False
70
True or False
The term abiotic refers to the living factors in an
ecosystem.
True
71
True or False
In science, a hypothesis is an educated guess
based on observations.
True
72
True or False
In experiments the factor that is changed is
called the variable.
True
73
True or False
Grazing food chains begin with animals.
False
74
True or False
Alleles are different forms of the same gene.
True
75
True or False
Chromosomes are made up of DNA and protein.
True
76
True or False
A human sperm cell contains 23 chromosomes.
True
77
True or False
Phenotype is the genetic make-up of an
organism.
False
78
True or False
Replication is the copying of DNA.
True
79
True or False
RNA contains the base thymine.
False
80
True or False
Genetic engineering is the manipulation and
alteration of genes.
True
81
True or False
The copying of the DNA code into mRNA is
called transcription.
True
82
True or False
Single-celled organisms use meiosis for asexual
reproduction.
False
83
True or False
In telophase of mitosis, a cleavage furrow forms
in plant cells.
True
84
True or False
When a cell is not dividing it is said to be in
prophase.
False
85
True or False
The nuclear membrane disappears in the early
part of mitosis.
True
86
True or False
Centromeres give rise to the nuclear spindle.
True
87
True or False
Mitosis is a source of variation.
False
88
True or False
In multicellular organisms mitosis is primarily
used for growth.
True
89