Biology Mock 2021

Question 1 of 50

The tiny filtering unit of the kidney, of which there are about a million, is the

Question 2 of 50

Sickle cell anaemia is an example of

Question 3 of 50

In a food chain, green plants are the

Question 4 of 50

The part of a light microscope that holds the slide is the

Question 5 of 50

A microscope with a ×10 eyepiece and ×40 objective gives a total magnification of

Question 6 of 50

The coarse adjustment knob is used to

Question 7 of 50

The rearing of fish in ponds is called

Question 8 of 50

A closed fishing season helps to

Question 9 of 50

The organelle that controls the activities of the cell is the

Question 10 of 50

The partially permeable layer that surrounds all cells is the

Question 11 of 50

The scientific name Homo sapiens is an example of

Question 12 of 50

Insects belong to the phylum

Question 13 of 50

All the populations living in an area make up a

Question 14 of 50

Organisms that break down dead matter are

Question 15 of 50

A food web is

Question 16 of 50

HIV attacks the body's

Question 17 of 50

The blood vessel that carries oxygenated blood from the lungs to the heart is the

Question 18 of 50

Anaerobic respiration in yeast produces

Question 19 of 50

Water moves up the xylem mainly because of

Question 20 of 50

The part of the brain that controls balance is the

Question 21 of 50

Fertilisation in humans normally takes place in the

Question 22 of 50

A cross between two heterozygous tall plants (Tt × Tt) gives a phenotypic ratio of

Question 23 of 50

A person with blood group O can donate blood to

Question 24 of 50

The relationship in which both organisms benefit is

Question 25 of 50

The quadrat is used to estimate

Question 26 of 50

Crossing over takes place during

Question 27 of 50

Which microscope can show the detailed structure of organelles such as ribosomes?

Question 28 of 50

Smoking fish preserves it by

Question 29 of 50

Using light to attract fish at sea (light fishing) is banned because it

Question 30 of 50

The organelle that packages and secretes proteins is the

Question 31 of 50

Lysosomes contain

Question 32 of 50

The role an organism plays in its ecosystem is its

Question 33 of 50

Energy is lost at each trophic level mainly as

Question 34 of 50

Typhoid fever is caused by a

Question 35 of 50

Guinea worm disease is contracted by

Question 36 of 50

The menstrual cycle is regulated by FSH, LH, oestrogen and

Question 37 of 50

Short-sightedness is corrected with a

Question 38 of 50

In a cross Rr × rr, the probability that an offspring is homozygous recessive is

Question 39 of 50

In a predator–prey cycle, predator numbers usually peak

Question 40 of 50

A quadrat of 0.25 m² samples an average of 6 plants. The estimated density per m² is

Question 41 of 50

The carrying capacity of an environment is

Question 42 of 50

Fish ponds are drained and limed between cycles mainly to

Question 43 of 50

Fetal haemoglobin has a higher affinity for oxygen than adult haemoglobin so that

Question 44 of 50

Accommodation for near vision involves

Question 45 of 50

Removing the tip of a shoot causes side branches to grow because

Question 46 of 50

In a population, 16% show a recessive trait (aa). The frequency of allele a is

Question 47 of 50

In a population where the recessive allele frequency q = 0.4, the frequency of heterozygotes (Aa) is

Question 48 of 50

Allopatric speciation occurs when populations are

Question 49 of 50

A trait controlled by many genes, such as skin colour, shows

Question 50 of 50

Net primary productivity is