Biology Year 13 Random Retrieval

This quiz contains all the questions in the year 13 biology section. The website will pick 20 questions at random.

1 / 20

What causes epigenetic markers to be added or removed from DNA?

Exposure to carcinogens.

Inherited mutations from parents.

Exposure to environmental conditions such as a balanced diet.

Exposure to ionising radiation.

2 / 20

What does the RISC complex do to the mRNA?

Cut the mRNA up at the sequence complementary to the siRNA

Extend the mRNA by adding the new siRNA section on.

Shorten the mRNA by removing the siRNA complementary section.

Nothing

3 / 20

Which of the following is an example of primary succession?

Volcanic eruption and lava flow creates new rock.

Ploughing a field.

Burning rain forest to clear scrub exposes soil.

4 / 20

What is the word used to describe 'Populations of different species in specific habitat'?

Niche

Community

Population

Ecosystem

5 / 20

What is an autosome?

Self replicating chromosome

All Chromosomes

All Chromosomes except the sex chromosomes

Only the Sex Chromosomes

6 / 20

Why are women far less likely to show sex linked disorders?

Because they don't have Y chromosomes which carry the disorder allele.

Because they have faster acting immune systems.

Because they have two X chromosomes, one is likely to be a healthy dominant allele and masque the recessive disorder one.

Because they are less likely to moan about it and so not get diagnosed.

7 / 20

In Guinea pigs, ginger(G) hair is dominant to white(g), and short hair (S) is dominant to long (s). In the following cross: GgSs and GgSS, what percentage chance will the offspring being born short haired and white?

0.25

0.19

0.06

0

8 / 20

The diagram above shows a cross section of a human eye. Name layer A (Type your answer).

9 / 20

What effect do inhibitory synapses have on the post-synaptic membrane?

Depolarise

Repolarise

Hyperpolarise

10 / 20

Using the diagram, name D

Ligand Gated Ion Channel

Voltage Gated Ion Channel

Sodium-Potassium Pump

11 / 20

Many peripheral neurones (including motor neurones)have cells wrapped around the axon.

What are these cells called? ( type your answer- watch your spelling).

12 / 20

What do we call the process happening at '3' on the above diagram?

Depolarisation

Polarisation

Repolarisation

13 / 20

Which word best describes the charge distribution across a resting axon plasma membrane?

Polarised

Depolarised

Hyperpolarised

14 / 20

In the above experiment, you hypothesised that a woodlouse responds by kinesis to a change in light intensity. What would be the best way to measure a response which shows kinesis?

By putting them on the lighter side, and seeing if they move to the darker side.

By counting how many woodlice are on the dark side after on minute.

By measuring how often each woodlice turns/ changes direction in one minute.

15 / 20

True or False : Symbiotic fungi generally increase the amount of glucose in a plant.

TRUE

FALSE

16 / 20

Which process can occur due to the actions of Nitrobacter bacteria?

A

B

C

17 / 20

This diagram shows part of the Nitrogen cycle. Name process E

Nitrification

Nitrogen Fixing

Denitrification

18 / 20

Which direction would the bubble move in the above experiment?

Left ( towards the flask)

Right (away from the flask)

19 / 20

Which molecule is represented by Y?

NADP

Reduced NAD

NAD+

20 / 20

Why did the student set up tube 1?

To allow for comparison

To act as a control

To show light does not effect DCPIP

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