Environmental (3)

Question 1

Nitrogen

Answer 1

Element required for amino acids, nucleic acids, ATP, chlorophyll etc

Question 2

Chlorosis, red leaf bases, long roots, reduced growth

Answer 2

Symptoms of nitrogen deficiency

Question 3

Phosphorus

Answer 3

Element required for ATP nucleic acids, NADP etc

Question 4

Red leaf bases and reduced growth

Answer 4

Symptoms of phosphorus deficiency

Question 5

Potassium

Answer 5

Element involved in membrane transport

Question 6

Magnesium

Answer 6

Element present in chlorophyll molecule

Question 7

Nicotine and Alcohol

Answer 7

Two drugs which restrict growth and mental development of the foetus

Question 8

More permeable to water

Answer 8

Effect of increased ADH level on kidney tubules

Question 9

Insulin

Answer 9

Hormone produced by pancreas which promotes conversion of glucose to glycogen

Question 10

Glucagon

Answer 10

Hormone produced by pancreas which promotes breakdown of glycogen to glucose

Question 11

Adrenaline

Answer 11

Hormone which promotes breakdown of glycogen to glucose in times of stress

Question 12

Chlorotic leaves and reduced growth

Answer 12

Symptoms of magnesium deficiency

Question 13

Iron

Answer 13

Element in haemoglobin, many enzymes and hydrogen carrier systems

Question 14

Calcium

Answer 14

Element in shells, bones, teeth and needed for blood clotting

Question 15

Vitamin D

Answer 15

Substance needed for calcium absorption in the intestine

Question 16

Rickets

Answer 16

Result of deficiency in Vitamin D and poor calcium absorption in the intestine

Question 17

Thalidomide

Answer 17

Drug which causes limb deformities in the foetus

Question 18

Long day plants

Answer 18

Plants which flower when number of hours of light per day is greater than a critical level

Question 19

Short day plants

Answer 19

Plants which flower when the number of hours of light per day is less than a critical level

Question 20

Photoperiodism

Answer 20

Mechanism where plants flower and animals breed in response to the number of hours light per day

Question 21

Negative feedback

Answer 21

Process where a change from set point is detected and mechanism switched on to correct it

Question 22

Homeostasis

Answer 22

Maintaining conditions within tolerable limits - around set point

Question 23

ADH

Answer 23

Hormone produced by pituitary in response to decreased blood water concentration