Interactive Questions 03

7/31/2019 Interactive Questions 03

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INTERACTIVE MULTIPLE

CHOICE QUESTIONS

Test 3

The answers are provided, but so also are

explanations of why the alternatives areunsatisfactory


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These multiple choice questions are similar to the ones set by

the GCSE and IGCSE Examination Boards except that, in

some cases, there may be more than one acceptable answer.

For this reason, even if you select a correct answer at yourfirst attempt, it is worth looking at all the alternatives

(a) to see if there is a better answer and

(b) to see why some of the alternatives are unacceptable

Question 1


3/103

You are shipwrecked on a barren island but you have rescued

three hens and a bag of wheat from the ship. Your best survival

strategy is to

Question 1

(a) feed the wheat to the hens, eat the eggs

they lay and then kill and eat the hens

(b) share the wheat with the hens, eat the

eggs and then eat the hens

(c) eat the hens and then eat the wheat

(d) eat all the wheat and then kill and eat the hens

Question 2


4/103

No

All the time the hens are alive they will be using their food to

produce energy as well as eggs. This energy will not be

available to you, so you are losing out on the potential value

of the food available


5/103

All the time the hens are alive they will be using their

food to produce energy as well as eggs. This energy

will not be available to you, so you are losing out on

the potential value of the food available

No


6/103

All the time the hens are alive they will be using their food to

produce energy as well as eggs. This energy will not be

available to you, so your best strategy will be to kill and eat thehens as soon as possible

Yes


7/103

All the time the hens are alive they will be using their food

to produce energy as well as eggs. This energy will not be

available to you, so you are losing out on the potential value

of the food available

No


8/103

Humans in hot weather

Question 2

(a) produce more urine at a greater concentration

(b) produce less urine at a weaker concentration

(c) produce less urine at a stronger concentration

(d) Urine production is not affected by hot weather

Question 3


9/103

No

In hot weather, more water is lost by evaporation

(e.g. sweating) and so a smaller volume of urine is

produced


10/103



produced but it will be of a higher concentration

No


11/103



produced. It will also have a higher concentration

Yes


12/103

No

In hot weather there is a reduced volume of urine

and at a higher concentration because water is lost

by evaporation, leaving less to be excreted by the

kidneys


13/103

This animal is classified as

Question 3

(a) a nematode

(b) an annelid

(c) a millipede

(d) a mollusc

Question 4


14/103

No

Nematode worms are not segmented


15/103

Yes

The drawing is of a segmented worm called Nereis

(ragworm)


16/103

No

The drawing bears a superficial resemblance to a

millipede but there are no jointed legs


17/103

No

Molluscs are not segmented


18/103

Compared with the air breathed in, the air leaving thelungs will have

Question 4

(a) less oxygen, more carbon dioxide

and more water vapour

(b) less carbon dioxide, more oxygen and

more water vapour

(c) less oxygen, more carbon dioxide and

less water vapour

(d) more carbon dioxide, less oxygen

and more nitrogen

Question 5


19/103

Yes

Gaseous exchange in the alveoli results in oxygen being

absorbed and carbon dioxide being given out. Also,

evaporation from the lining of the alveoli results in anincrease in the water vapour breathed out.


20/103

Gaseous exchange in the alveoli results in oxygen being

absorbed and carbon dioxide being given out.

No


21/103

It is correct that gaseous exchange in the alveoli

results in oxygen being absorbed and carbon dioxidebeing given out. However, evaporation from the lining

of the alveoli results in an increase in the water vapour

breathed out.

No


22/103

No

Although air contains 79% nitrogen, it is an inert gas

and does not play a part in respiration, so the

nitrogen content of the air breathed in and out does

not change


23/103

The biceps muscle is

(a) a flexor muscle

(b) an extensor muscle

(c) a voluntary muscle

(d) antagonistic to the triceps muscle

Question 5

Question 6


24/103

Yes

When the biceps muscle contracts, it flexes

the arm at the elbow


25/103

No

The extensor muscle is the triceps. It extends

(straightens) the arm at the elbow


26/103

Yes

The biceps is a voluntary muscle which responds

to nervous impulses from the brain.


27/103

Yes

The action of the muscles have opposite

effects. The biceps flexes the arm at the elbow

and the triceps extends the arm


28/103

Question 6

(d) CH3OH (methanol)

(c) 6CO2 (carbon dioxide)

(b) C3H6O3 (lactic acid

(a) C2H5OH (alcohol)

Question 7

What is missing from this equation which represents oneform of respiration ?

C6H12O6 + 6O2 + 6H2O


29/103

No

C2H5OH (alcohol) is a product ofanaerobic

respiration (fermentation). The presence of 6O2 in

the equation shows that this is aerobic respiration


30/103

C3H6O3 (lactic acid) is a product ofanaerobic

respiration in muscle. The presence of 6O2 in the

equation shows that this is aerobic respiration

No


31/103

Yes

The presence of 6O2 in the equation shows that this is

aerobic respiration and the glucose (C6H12O6) will be

completely oxidised to carbon dioxide (6CO2) andwater (6H2O)


32/103

No

CH3OH (methanol) plays no part in respiration


33/103

Question 7

When the eye accommodates to focus on a distant object

(a) the ciliary muscle contracts

(b) the ciliary muscle relaxes

(c) the lens becomes thicker at the middle

(d) the lens becomes thinner at the middle

Question 8


34/103

No

When the ciliary muscle contracts it reduces thetension in the suspensory ligament and allows the

lens to become thicker in the middle. This is

accommodation for close objects

ciliary

muscle

light from nearby

object


35/103

Yes

When the ciliary muscle relaxes it allow the fluid

pressure in the eye to pull the lens to a thinner shape.

This is accommodation to focus distant objects

light from

distant object

ciliary muscle

light from

distant object


36/103

No

A lens which is thick in the middle has a shorter

focal length and will focus close objects (see

answer(a))


37/103

Yes

A thinner lens has a longer focal length and will focus

distant objects (see answer (b))


38/103

Question 8

Which of the following would make the best contribution

to a balanced diet?

(a) Fish and chips

(b) Pizza and salad

(c) Sausage and mash with runner beans

(d) A cheese sandwich

Question 9


39/103

Not the best

The fish provides protein and the chips provide carbohydrate.

The cooking oil supplies fats. But there is very little content of

vitamins or dietary fibre


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Not the best

The green salad will provide some vitamins and dietary fibre

but the pizza is largely carbohydrate, though the topping may

contain a small amount of protein


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This is the best

The sausage will provide protein and fats; the mashed

potatoes will be largely carbohydrate and the runner

beans will contain dietary fibre and vitamins A and C


42/103

Not the best

The cheese will contain protein, fat and vitamin A. The bread

will be largely carbohydrate. Unless the bread is wholemeal

there will be little dietary fibre. The vitamins found in green

vegetables, particularly vitamins A and C will not be presentin sufficient amounts


43/103

Question 9

In order to make chlorophyll a green plant specifically needs

a supply of

(a) calcium ions

(b) phosphate ions

(c) potassium ions

(d) magnesium ions

Question 10


44/103

No

Plants do need calcium ions for building cell walls, for

example. But they do not need them specifically for

making chlorophyll


45/103

No

Plants need phosphate ions for making DNA, for example, and

for many chemical processes. But they do not need phosphates

specifically for making chlorophyll


46/103

No

Plants need potassium for root development and flower

formation but not specifically for producing chlorophyll


47/103

Magnesium is an essential part of the chlorophyll molecule

Yes


48/103

Question 10

Which of the following can be described as either a source

or a sink?

(a) Sieve tubes in the phloem

(b) Leaves

(c) Potato tubers

(d) Xylem vessels

Question 11


49/103

No

Sieve tubes in the phloem carry food from one part of the

plant to another (from sources to sinks) but they

themselves are not sources or sinks


50/103


51/103

Yes

The sugar made in the leaves is transported in the phloem

and stored as starch in the potato tubers. The tubers,

therefore, are SINKS.


52/103

No

The xylem vessels transport water and mineral ions from the

roots to all parts of the plant but they are not sources or sinks.


53/103

Question 11

Once the atria have filled with blood, which of the

following is the correct sequence for a heart beat ?

(d) Atria contractventricles contractbicuspid and

tricuspid valves closesemi-lunar valves open

(c) Atria contractventricles contractbicuspid and

tricuspid valves opensemi-lunar valves open

(b) Atria contract - bicuspid and tricuspid valves close -ventricles contract - semi-lunar valves open

(a) Semi-lunar valves closeatria contractventricles

contractbicuspid and tricuspid valves close

Question 12


54/103

No

The semi-lunar valves are already closed at this stage


55/103

No

The bicuspid and tricuspid valves do not close until the

ventricles contract


56/103

Contraction of the ventricles causes the bicuspid and

tricuspid valves to close

No


57/103

Yes

This is the correct sequence


58/103

Question 12

In which of the following ways do plant cells differ from

animal cells?

(a) They have a nucleus

(b) They have a cell wall

(c) They have a central vacuole

(d) They contain cytoplasm

Question 13


59/103

No

Typically, animal cells and plant cells both contain a

nucleus


60/103

Yes

Plant cells have a cellulose cell wall which is not

present in animal cells


61/103

Yes

Mature plant cells have a large, central, fluid-filled

vacuole. Animal cells may have small vacuoles

distributed throughout their cytoplasm


62/103

No

All living plant and animal cells contain cytoplasm though

its distribution in the cell is different


63/103

Question 13

fruit

style

This fruit is adapted

for dispersal by

(c) explosive method

(b) water

(a) animals

Question 14

(d) wind

1cm fruit

style


64/103

No

You would expect a fruit adapted to dispersal by

animals (mammals) to have tiny hooks to catch in the

animals fur.


65/103

No

The fruit may be occasionally dispersed by water

but it does not show any adaptation to this method


66/103

No

It is usually seeds, not fruits, which are

dispersed by an explosive method and they are

usually small and smooth, thus offering little

air resistance


67/103

Yes

The fine hairs on the style increase air resistance and thefruit is likely to be carried away by the wind.

The fruit is that of wild clematis often seen growing in

hedgerows and called old mans beard because of the

appearance of these fruits in dense clusters

Single clematis flower after fertilisation


68/103

Question 14

Which of the following formulae could represent a

carbohydrate?

(d) C2H5OH

(c) C12H22O11

(b) CH2.NH2.COOH

(a) C6

H12

O6

Question 15


69/103

Yes

This compound contains only carbon, hydrogen

and oxygen, with the hydrogen and oxygen in the

ratio of 2:1. It could be glucose or fructose, for

example.


70/103

No

Although the compound contains carbon, hydrogen and

oxygen it also contains nitrogen. It is an amino acid,

glycine. TheNH2 is the amino group and the -COOH isthe acid group.


71/103

Yes

This compound contains only carbon, hydrogen and

oxygen, with the hydrogen and oxygen in the ratio

of 2:1. It could be sucrose or maltose, for example.


72/103

No

Although the compound contains carbon, hydrogen and

oxygen, the hydrogen and oxygen are not in the ratio 2:1.

This compound is ethanol.


73/103

Question 15

Antibodies are made by

(a) the liver

(b) lymphocytes

(c) lymph nodes

(d) the red bone marrow

Question 16


74/103

No

The liver makes proteins (globulins) which play

an important part in the immune reaction but they

are not antibodies.


75/103

Yes

Lymphocytes are a type of white blood cell. They

produce antibodies against bacteria and other harmful

bodies which get into the blood stream


76/103

Yes and No

Lymphocytes are stored in the lymph nodes and

produce and release antibodies, but the lymph node

itself does not produce antibodies


77/103

No

The red bone marrow produces the blood cells,

including lymphocytes, but it doe not make antibodies


78/103

Question 16

Before mitosis occurs

(a) the chromosomes split

(b) the spindle appears

(c) the chromosomes replicate

(d) the chromosomes pair up

Question 17


79/103

No

The chromosomes do not split but each chromosome

makes a copy of itself. The original chromosome and

its copy are called chromatids.


80/103

No

The spindle does not appear until mitosis has

started.


81/103

Yes

Each chromosome makes a copy (a replica) of itself ,

i.e. it replicates. The original chromosome and its copy

are called chromatids


82/103

No

In mitosis, the chromosomes do not pair up. It is in

the early stages ofmeiosis that the chromosomes

form pairs


83/103

Question 17

The effect of insulin is to

(a) increase the release of glucose from the liver

(c) increase the amount of glucose taken up by the tissues

(b) increase the amount of glucose stored in the liver

(d) reduce the amount of glucose stored in the tissues

Question 18


84/103

No

It is the hormone glucagon which causes the liver to

convert stored glycogen into glucose and release it into

the blood stream


85/103

Yes

Insulin causes the liver to take up glucose from the blood

and convert it to glycogen which is stored


86/103

Yes

Insulin causes the tissues to take up glucose from the

blood stream


87/103

No

Insulin has the reverse effect


88/103

Question 18

In a flowering plant, fertilisation takes place when

(a) a bee visits a flower

(d) pollen is deposited on the stigma

(c) the pollen tube grows down to the ovary

(b) the pollen nucleus fuses with the egg nucleus

Question 19


89/103

No

The bees visit to the flower may bring pollen into

contact with the stigma but this is not fertilisation


90/103

Yes

The fusion of male (pollen) and female (egg) nuclei is

the defining moment of fertilisation


91/103

No

The growth of the pollen tube is necessary to bring the

pollen nucleus into the egg cell but it does not constitute

fertilisation. It is, however, an essential stage in the process

which results in fertilisation


92/103

No

The deposition of pollen on the stigma ispollination.

It is an essential step in the sequence of events

leading to fertilisation but it does not constitute

fertilisation.


93/103

Question 19

Bacteria reproduce asexually by cell division. In favourable

conditions, what is the maximum rate of cell division in

some bacteria?

(c) Every 2 hours

(a) Every 2 minutes

(b) Every 20 minutes

(d) Every 24 hours

Question 20


94/103

No


95/103

Yes

This is the maximum frequency of bacterial cell

division most often quoted


96/103

No


97/103

No


98/103

Question 20

The organic bases present in DNA are

(d) adenine, guanine, cytosine and thymine

(c) cytosine, glycine, adenine and thymine

(b) alanine, guanine, thymine and cytosine

(a) adenine, guanine, cytosine and valine


99/103


100/103

No

Alanine is an amino acid


101/103

No

Glycine is an amino acid


102/103

Yes


103/103

End of questions

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