AS 2022 June Mock Improvements

Question 1

What is the paired student’s T test?

Answer 1

The paired student’s T test is when means of the same group or item are compared under two seperate senarios

Question 2

What is the unpaired student’s T-test?

Answer 2

The unpaired student’s T-test is when means of two independant or unrelated groups are compared

Question 3

What is the cofactor for carbonic anhydrase?

Answer 3

The cofactor for carvbonic anhydrase is zinc (Zn^2+)

Question 4

Difference between endonuclease and exonuclease

Answer 4

-Restriction endonuclease breaks the phosphodiester bonds between deoxyrobise and phosphate groups (within the amino acids)
-Restriction exonuclease breaks the polypeptide sequence at the ends

Question 5

Which tissue transports nitrates?

Answer 5

Xylem tissue transports nitrates?

Question 6

How to know a protein is in its quaternary structure?

Answer 6

Quaternary structure -> protein consists of more than one polypeptide chain -> chains joined by bonds ie disulfide bonds

Question 7

Why are more species gene loci monomorphic rather than polymorphic?

Answer 7

Why are more species gene loci monomorphic rather than polymorphic:
-Lower genetic biodiversity ie hunting, extinction - lower variety of alleles
-Only takes rare mutations

Question 8

What causes oncotic pressure?

Answer 8

Plasma proteins too large to leave capillary -> creates a low water potential -> water potential lower than tissue fluid -> water moves in by osmosis into capillary causing oncotic pressure

Question 9

Role of meristematic tissue

Answer 9

Meristematic tissue -> stem cells -> differentiates into any cell -> growth and repair of demaged tissue