Biology Year 12 Random Retrieval

This quiz contains all the questions in the year 12 biology section. The website will pick 20 questions at random.

1 / 20

True or false - The Founder Effect is a type of genetic bottle neck?

TRUE

FALSE

2 / 20

What word describes cells which contain single chromosomes?

Haploid

Diploid

Polyploid

3 / 20

Where does the enzyme used in transcription bind?

To a double stranded section of DNA.

To the start of a gene (called a promoter).

At the start of the chromosome.

4 / 20

What does the 'm' stand for in mRNA?

Migrating

Multiple

Messenger

5 / 20

Which type of DNA is not circular?

Mitochondrial

Plant Nuclear

Chloroplast

Bacterial

6 / 20

Xylem or Phloem ? - This type of cell is living, but with few organelles.

Xylem

Phloem

7 / 20

What is the function of the lamellae?

To maintain a concentration gradient over the whole filament.

To reduce the diffusion pathway.

To increase the surface area.

8 / 20

NMO is a disease NMO is a disease that leads to damage to nerve cells in the spinal cord. A person with NMO produces anti-AQP4 antibody that attacks only these nerve cells. Explain why the anti-AQP4 antibody only damages these cells

The antibody has a binding site complementary to nerve cells.

The antibody has an active site complementary only to the antigen on the nerve cells.

The antibody has a binding site complementary only to the antigen on the nerve cells.

9 / 20

Which is the variable region on the above diagram?

A

B

D

10 / 20

In the above diagram, there are three membrane proteins: A, B and C. Which represents where co-transport occurs?

A

B

C

11 / 20

Would the number of carrier proteins present affect the rate of active transport across a membrane?

Yes

No

12 / 20

Which part of the phospholipid bilayer prevents sodium ions leaving via simple diffusion?

Hydrophilic Heads

Hydrophobic Tails

Glycocalyx

13 / 20

Name this organelle.

Rough Endoplasmic Reticulum

Smooth Endoplasmic Reticulum

Golgi Body

14 / 20

Are the bonds between water molecules stronger or weaker than covalent bonds?

Stronger

Weaker

15 / 20

Explain why line B forms a plateau:

Because the enzyme has denatured.

Because the enzyme is catalysing as fast as it can, and cannot make any more enzyme-substrate complexes.

Because eventually all the substrate is used up, and no new product can be formed, no matter how much enzyme is added.

16 / 20

On the above diagram, which letter represents the activation energy with an enzyme?

A

B

C

17 / 20

Other than peptide bonds, a folded protein also contains:

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

Which type of bond forms between two cysteine R groups?

i)

ii)

iii)

18 / 20

What is the name of this molecule?

Poly-peptide

Di-pepide

Bi-peptide

19 / 20

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

Peptide bond

Liptide bond

Ester Bond

20 / 20

Which monomer is this polysaccharide made out of?

Alpha Glucose

Beta Glucose

Fructose

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