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

Two of the above mutations will always cause a non functional protein. Why?

They add or remove an amino acid.

They alter both strands of the double helix.

They cause a frame-shift in the triplet code.

3 / 20

What bond is formed between the free RNA bases, once they have formed complementary base pairs?

Ester Linkage

Hydrogen Bond

Phospho- Di Ester Bond

4 / 20

What do we call the arteries which supply the heart muscle?

Myocardial Arteries

Coronary Arteries

Cardiac Arteries

5 / 20

In the diagram of the human circulatory system, which letter represents the Vena Cava?

A

B

C

6 / 20

Why do some xerophytes have hairs over the stomatal pits?

To protect the delicate guard cells.

To prevent wind moving away air with a high water concentration, thus reducing the water concentration gradient.

To stop insects getting in and stealing the water.

7 / 20

Which number represents a layer which is 2 or 3 times thicker in desert plants?

1

3

4

8 / 20

Which number represents cells that can control water loss?

7

8

9

9 / 20

Oxygen diffuses out of the tracheoles directly into what?

Respiring body cells.

The insect's open circulatory system.

Air Sacs.

10 / 20

Tuberculosis (TB) is caused by bacteria infecting the lungs, where amongst other effects it reduces tidal volume. What happens to the ventilation rate of sufferers?

Increases

Decreases

Stays the same

11 / 20

What is the volume of the same palisde cell measuring 100 µm by 40 µm?

160,000 µm³

5,600µm³

400,000 µm³

1,600,000µm³

12 / 20

What happens to a B lymphocyte when it is activated?

Agglutination

Divides by Mitosis

Phagocytosis

13 / 20

What name describes the double layered structure of a membrane? (Spell it correctly)

14 / 20

Which of the following organelles are visible with a light microscope?

a) Nucleus
b) Lysosomes
c) Chloroplasts

A & B

A & C

A, B & C

15 / 20

Bacterial cell division creates.

4 identical daughter cells.

4 non-identical daughter cells.

2 identical daughter cells.

16 / 20

Name part C

Stroma

Grana

Lamella

17 / 20

Which process requires the use of ATP?

Facilitated Diffusion

Osmosis

Active Transport

18 / 20

Describe what the line would look like when a competitive inhibitor was added to the reaction.

The line would increase less steeply, but it would eventually plateau at the same rate as withut an inhibitor.

The line would be less steep at the start, and would plateau at a rate below the line without an inhibitor.

The line would go up at the same gradient at the start, but would then plateau at a lower rate.

19 / 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)

20 / 20

What is wrong with amino acid C?

There is an OH missing off the N group.

There is an extra OH group on the acidic group.

There is an OH group off the central carbon atom.

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