NSAA

Question 1

sum of interior angles

Answer 1

(n-2) x 180

Question 2

sum of exterior angles

Answer 2

360

Question 3

how to calc exterior angle

Answer 3

360/n

Question 4

area of parallelogram

Answer 4

b x h

Question 5

area of trapezium

Answer 5

0.5(a+b)h

Question 6

area of kite/rhombus

Answer 6

(diagonal 1 x diagonal 2)/2

Question 7

circumference of circle

Answer 7

2πr = πd

Question 8

volume of sphere

Answer 8

4/3 πr³

Question 9

surface area of sphere

Answer 9

4πr²

Question 10

total population size

Answer 10

(total area/area sampled) x # of organisms of that species counted in sample

Question 11

rate of transpiration

Answer 11

volume of water/time taken

Question 12

cardiac output

Answer 12

heart rate x stroke volume

Question 13

autosome

Answer 13

not a sex chromosome

Question 14

A G

Answer 14

purine

Question 15

C T U

Answer 15

pyrimidine

Question 16

interphase stages

Answer 16

G1, S, G2

Question 17

golgi + vesicles function

Answer 17

• add carbs to proteins to form glycoproteins
• produce secretory enzymes
• secrete carbs
• transport, modify + store lipids
• form lysosomes
• molecules “labelled” with their destination, e.g by adding a receptor
• finished products transported to cell surface in golgi vesicles + they fuse with the membrane + the contents are released

Question 18

centrioles

Answer 18

• create spindle fibres
• spindle fibres released from both poles + create spindle apparatus
• spindle apparatus attach the centromere + chromatids on the chromosome during mitosis

Question 19

what is the unloading/dissociation of haemoglobin?

Answer 19

when oxygen detaches or unbinds from haemoglobin

Question 20

is oxygen loaded in areas with high or low partial pressure? give an example of one of these areas.

Answer 20

• high partial pressure
• alveoli

Question 21

is oxygen unloaded in areas with high or low partial pressure? give an example of one of these areas.

Answer 21

• low partial pressure
• respiring tissues

Question 22

describe the oxyhaemoglobin dissociation curve and what it shows

Answer 22

• sigma curve
• oxygen partial pressure on x axis, % saturation on y axis
• lower partial pressure = lower affinity = unloading of O₂ at sites where it’s needed
• almost 100% saturation of O₂ at higher partial pressure = haemoglobin high affinity for oxygen in areas of high partial pressure, bc loading lots of oxygen which is transported by rbc to be unloaded in areas where respiration is occuring (low partial pressure areas)