Separate Biology Exam Practice Homework

Separate Biology Exam Practice Homework

Complete 1 exam question a week

Name: …………………………………..

Group: …………………………………..

Target: …………………………………..

Week / Completed? Y/N / Score
1 / /6
2 / /3
3 / /6
4 / /4
5 / /8
6 / /8
7 / /6
8 / /6
9 / /6

Week 1

Q1 (SB1).

Some students investigated the effect of sucrose concentration on the change in mass of beetroot chips.
A beetroot chip was weighed, immersed in water for 30 minutes and then reweighed.
This was repeated using five more beetroot chips and five different concentrations of sucrose solution.
The results are shown in Figure 6.

Figure 6

(i) Calculate the percentage change in mass for chip 5.

Give your answer to an appropriate number of decimal places.

(3)

...... %

(ii)Explain the difference in the changes in mass of chip 5 and chip 2.

(3)

......

(Total for question = 6 marks)

Week 2

Q2 (SB3).

In 2011, South Korean scientists genetically engineered a cell from a beagle.

They then cloned this cell to create a beagle.

They called this beagle Tegon.

Tegon glows in the dark when UV light is shone on him.

Cloning involves cells that divide by mitosis.

(a) Complete the sentence by putting a cross () in the box next to your answer.

When a cell divides by mitosis it produces

(1)

A two cells that are genetically different

B two cells that are genetically identical

C four cells that are genetically different

D four cells that are genetically identical

(b) To genetically engineer the original cell so that it would glow, the scientists had to obtain a suitable gene.

(i) Describe the stages that a scientist would complete to obtain this gene.

(2)

......

Week 3

*(ii) Describe the stages used in the laboratory to clone and produce Tegon from the genetically engineered cell.

(6)

......

Week 4

Q3 (SB2).

Some myelinated motor neurones transmit impulses at speeds of approximately 100 m/s.

Figure 2 shows the technique used to measure the speed of nerve impulses in the lower leg of a person.

Figure 2

(i) Explain how the technique shown in Figure 2 could be used to calculate the speed of a nerve impulse.

(2)

......

(ii)Guillain-Barré syndrome is a disease that causes the body to break down the myelin sheaths on motor neurones.

Explain why Guillain-Barré syndrome can cause reduced movement of the legs.

(2)

......

(Total for question = 4 marks)

Week 5

Q4 (SB4).

Charles Darwin studied the variety of finches on the Galapagos Islands.

He used this information to develop his theory of evolution.

Some of the finches are shown in the diagram.

(a) (i) State the genus and the species of the large cactus ground finch.

(2)

......

(ii) Suggest how the size and shape of their beaks enabled all of these types of finches to survive.

(2)

......

(ii) Complete the sentence by putting a cross ( ) in the box next to your answer.

Darwin's finches are an example of speciation due to

(1)

A selective breeding

B geographic isolation

C hybridisation

D the development of ring species

(b) Suggest how these species of finches could have evolved.

(3)

......

(Total for Question is 8 marks)

Week 6

Q5 (SB4).

Classification

(a) All the organisms in the diagram belong to one Kingdom.

(i) Which Kingdom do these organisms belong to?

Place a cross () in the box next to your answer.

(1)

A Animalia

B Fungi

C Protoctista

D Prokaryotes

(ii) In which structure are the chromosomes of these organisms found?

Place a cross () in the box next to your answer.

(1)

A cilia

B chloroplast

C flagellum

D nucleus

(iii) Suggest one reason why both Euglena and Chlamydomonas could be placed into the Kingdom Plantae.

(1)

......

(b) (i) Euglena is unusual because it is both heterotrophic and autotrophic.

Explain how this helps Euglena to survive.

(3)

......

(ii) A scientist discovered a new species of Euglena in boiling acidic mud in Costa Rica.

Explain how this discovery could be validated by the scientific community.

(2)

......

(Total for question = 8 marks)

Week 7

Q6 (SB5).

In 2012 there was an outbreak of whooping cough in the UK.

The graph shows the number of new cases of whooping cough in the UK from April to December 2012.

(a) (i) Describe the trend shown in the graph from April to December.

(1)

......

(ii) In September 2011 there were 168 cases of whooping cough in the UK.

Calculate the difference in the number of cases of whooping cough in September 2011 and September 2012.

(2)

...... cases

(b) Whooping cough is caused by the bacterium Bordetella pertussis, which grows rapidly in the human body.

State the term used to describe the rapid growth of a bacterial population.

(1)

......

Suggest why outbreaks of whooping cough still occur in the UK.

(2)

......

Week 8

Q7 (SB6).

A student wanted to investigate the effect of light on the growth of cress seedlings.

The student had three pots of seedlings grown in different conditions.

Pot A was placed in a window with light from one direction only.

Pot B was placed in a cupboard with no light.

Pot C was placed with light from above.

Figure 8 shows the seedlings at the end of the investigation.

(a) (i)Label the pots of cress seedlings A, B and C.

(2)

(ii)What is the response shown by the cress seedlings in Pot A?

(1)

A negative gravitropism

B negative phototropism

C positive gravitropism

D positive phototropism

(iii)State the plant hormone that causes the cress seedlings to grow towards the light.

(1)

......

(b) The student wanted to find out where the hormone that caused the response to directional light was found.

The student had two growing plant shoots and placed them both in a window with light coming from one direction.

Describe a method the student could use to show that the hormone was found in the tip of the plant shoot.

(2)

......

(Total for question = 6 marks)

Week 9

Q8 (SB7).

The temperature of Rebecca's brain and of one of her fingers was recorded at six different external temperatures.

(i) Calculate the maximum temperature range for Rebecca's finger.

(1)

answer ...... °C

(ii) Compare the temperature of Rebecca's brain and her finger as the external temperature decreased.

(2)

......

(iii) Explain why the temperature of Rebecca's finger showed this response to the decrease in the external temperature.

(3)

......