A Pt 1

Question 1

If you have a 50ml of a 35mM solution of sucrose,how much does it contain?

Answer 1

1.75mmol (concentration x volume in litres)

Question 2

What is the correct name for the bond between carbon-6 of one D-(+)- glucose molecule and carbon-5 of a second one, wherein the ‘O’ of the bond is from the former?

Answer 2

A (6- ->5) glycosidic bond

Question 3

What is the monomer of RNA?

Answer 3

The ribonucleotide

Question 4

4 statements about C=C bonds

Answer 4

1. They are found in unsaturated fatty acids
   2.they show cis-/trans-isomerism
   3.they are found in alkenes
   4.they are important in areas such as light sensing in the eyes of mammalian

Question 5

The bases found in RNA are…

Answer 5

Uracil
Inosine
Dihydrouridine
Pseudouridine
7-methylguanine

Question 6

What is able to form isopeptide bonds with lysine?

Answer 6

Aspartic acid

Question 7

An example of an aromatic acid?

Answer 7

Phenylalanine

Question 8

True statements about D-(+)-glucose

Answer 8

1. It is a monosaccharide
2. It is a reducing sugar
   3.mostly found in solution as one of two ring conformations
   4.is it found in the cytoplasm of mammalian

Question 9

Statements about glycosides

Answer 9

1. They include species like Arbuthnot,amygdalin and salicin
2. They include plant hormones, defence molecules etc
3. They are found in every domain of life
   4.they are reactive molecules ‘muted’ by a sugar moiety

Question 10

What acid are found widely in biology but seldom in proteins?

Answer 10

D-Amino acids

Question 11

Statement about enzymatic catalysis

Answer 11

Enzymes lower activation energy but don’t change the Gibbs energy of the reaction

Question 12

Statements about Floridian starch

Answer 12

1. It contains both(1- - >4) and (1- ->6) glycosidic bonds
   2.it is found in the cytosol of the rhodophyta rather than in plastids
2. It has a degree of branching somewhere between glycogen and amylose
3. Is is found in red algae of rhodophyta

Question 13

Statements about -C(17:2)

Answer 13

1. It has a subterminal hydroxylation
   2.it is quite rare in the eukarya
2. It has a double-bond after the omega -2 carbon
3. It has 3 double bonds

Question 14

Statement an out a peptide bonds

Answer 14

The amide character of it means it does not rotate

Question 15

Structural amino acids encoded by the genetic code

Answer 15

1. Cysteine
   2.inosine
   3.selenocysteine
   4.selenomethioine

Question 16

What will give a more disordered cell membrane?

Answer 16

Cis unsaturated fatty acids

Question 17

True or false all glucosides are glycosides?

Answer 17

True