Biology Molecules Random Retrieval

This quiz contains all the questions in the Biology Molecules section. The website will pick 20 questions at random.

1 / 20

Many important substances in biological systems are ionic. What property of water allows these substances to dissolve and make water a good solvent?

Cohesion between molecules

A High latent heat of vaporisation

Polar Molecules

2 / 20

If DNA replicated by a Dispersive method ( fragments from each strand mixed), what would the DNA bands look like after two generations in N¹⁴ medium (Tube B)?

One band at N¹⁴

One band imbetween N¹⁴, and N¹⁵

Two bands: one at N¹⁵, and one imbetween N¹⁵ and N¹⁴

3 / 20

What name is given to the DNA fragments labelled C in the diagram?

Obama Fragments

Kawasaki Fragments

Okasaki Fragments

4 / 20

True or False : The enzyme DNA polymerase can only move in one direction along the template strand.

TRUE

FALSE

5 / 20

Which of the following is not true of RNA?

It is single stranded.

It contains deoxyribose.

It contains Uracil instead of 'T'.

6 / 20

What type of bond forms between complementary base pairs?

Phosphodiester

Ionic

Hydrogen

7 / 20

Name the type of bond that forms when two DNA monomers attach.

Phosphodiester Bond

Phosphodipeptide Bond

8 / 20

Where do competitive inhibitors bind ?

The Active Site

Somewhere on the protein other than the active site.

9 / 20

Which bonds are disrupted by changes in pH?

Hydrogen and Ionic Bonds

Hydrogen and Di-sulphide Bonds

Hydrogen, Ionic and Di-sulphide Bonds

10 / 20

Which word best describes the shape of the substrate?

The same as the active site

Complementary to the Active Site

Opposite to the active site

11 / 20

True or False : Endothermic enzyme controlled reactions do not require activation energy?

TRUE

FALSE

12 / 20

What is the next reagent to be added after this initial treatment?

Copper Carbonate

Copper Sulphate

Copper Oxide

13 / 20

Other than peptide bonds, a folded protein also contains:

i) Hydrogen Bonds
ii) Ionic Bonds
iii) Di-Sulphide Bridges.

Which bonds form the secondary structure?

i)

i) and ii)

i), ii) and iii)

14 / 20

Water is produced during the bonding of two amino acids. Where do the hydrogen and oxygen molecules originate from?

Two Oxygens and a Hydrogen from the acidic 'C' end.

An Oxygen from the acidic 'C' end of one, and two Hydrogens from the 'N' end of the other.

A hydroxyl group from the acidic 'C' end of one, and a Hydrogen from the 'N' end of the other.

15 / 20

What is the name of the COOH group on an amino acid molecule?

Carbonic acid

Carboxyllic acid

Carbunkle acid

16 / 20

If this diagram represented the plasma membrane of an epithelial cell in a human small intestine. What solutions would be on side'a' and side 'b'?

Digested juices and blood

Cytoplasm and digested juices

Blood and air

17 / 20

What type of bond joins a fatty acid to a glycerol molecule?

Peptide bond

Liptide bond

Ester Bond

18 / 20

What is the formula for the group at the end of a fatty acid where it bonds to the glycerol?

COH₂

COH

COOH

19 / 20

What feature does this polysaccharide have, that makes it straight?

Alternate monomers are inverted

Glycosidic bonds lie in opposite planes

Hydrogen bonds between polymers

20 / 20

Which molecule is Beta - Glucose?

A

B

C

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