2016

Question 1

nutrient recycling

Answer 1

reuse of nutrients

Question 2

symbiosis

Answer 2

a relationship between species in which at least one benefits

Question 3

non metallic element in protein except C, H, O, N

Answer 3

sulphur

Question 4

human cell water % by mass in human cell

Answer 4

70-95%

Question 5

asexual reproduction in yeast

Answer 5

budding

Question 6

advantage of asexual reproducing

Answer 6

•rapid
•no variation
•desires characteristic maintained

Question 7

disadvantage of asexual reproduction

Answer 7

•increased risk of disease
•overcrowding
•no variation
•increased competition

Question 8

long stage of cell cycle when division not occurring

Answer 8

interphase

Question 9

biomolecules produced during interphase

Answer 9

•nucleic acid
•protein
•fat
•carbohydrate

Question 10

an organelle replicated at interphase

Answer 10

•mitochondrion
•chloroplast
•ribosomes

Question 11

changes in cell by end of interphase

Answer 11

•coiled chromosomes
•chromosomes visible under microscope
•disappearance of nuclear membrane
•formation of spindle

Question 12

why don’t mature red blood cells not go under cell dividen

Answer 12

no nucleus

Question 13

control in reducing sugar test

Answer 13

water

Question 14

control colour at end of reducing sugar experiment

Answer 14

blue

Question 15

gel substance to trap enzyme when immobilizing an enzyme

Answer 15

sodium alginate

Question 16

substance to make gel insoluble in immobilizing enzyme experiment

Answer 16

calcium chloride

Question 17

3 carbon molecule in respiration

Answer 17

pyruvic acid

Question 18

pathway where pyruvic acid is produced

Answer 18

glycolysis

Question 19

fate of pyruvic acid when oxygen is available and used in the breakdown of glucose

Answer 19

turned into acetyl CoA

Question 20

pyruvic acid fate in krebs cycle

Answer 20

•CO2 produced
•atp produced
•nadh produced

Question 21

fate of pyruvic acid in electron transport system

Answer 21

•protons combine with o2/ electrons combine with o2 to form water

Question 22

anaerobic product in muscle

Answer 22

lactic acid

Question 23

anaerobic product in yeast

Answer 23

ethanol

Question 24

excretion

Answer 24

removal of metabolic waste

Question 25

egestion

Answer 25

removal of undigested material

Question 26

excretory products from mammals

Answer 26

•carbon dioxide •urca •salt(s)

Question 27

animals that can vary their metabolic rate significantly

Answer 27

endotherm

Question 28

species

Answer 28

a group of organisms capable of interbreeding to produce fertile offspring

Question 29

evolution

Answer 29

genetic changes in response to environment over time

Question 30

role of natural selection

Answer 30

•better adapted survive •reproduce •adaptation is inherited

Question 31

mutation

Answer 31

•a change in DNA

Question 32

gene mutation disorder

Answer 32

sickle cell anaemia

Question 33

chromosome mutation disorder

Answer 33

down syndrome

Question 34

requirements for successful tissue culture

Answer 34

•sterile conditions •suitable medium •suitable temp •suitable pH •oxygen supply

Question 35

turgid

Answer 35

pressure of cell contents against the cell wall

Question 36

a vein that transports blood out of the muscle from heart

Answer 36

coronary vein

Question 37

bring that brings blood away from kidneys

Answer 37

renal vein

Question 38

vein that carries little carbon dioxide

Answer 38

pulmonary vein

Question 39

vein that brings blood into right atrium

Answer 39

vena cava

Question 40

vein that has capillaries at both ends

Answer 40

hepatic portal vein

Question 41

how blood move through veins

Answer 41

skeletal muscle contracting, valves prevent back flow

Question 42

function of red marrow and yellow marrow

Answer 42

yellow - converts red blood cells to red marrow •red- produces blood cells