National 5 BiologyWilliamwood High

School

Cell Biology Homework Booklet

1

Homework 1- Cell Structure

Q2

2

Q2

3

4

Q4

Q3

Q53 and 4

Q6

7. Name four structural features that a typical animal cell and a typical plant cell share.

(1) 8. Name three structural differences between a typical animal cell and a typical plant cell.

(1) 9. Give the function of each of the following structures: (a) Cell membrane (b) Cell wall (c) Nucleus (d) Chloroplast (e) Vacuole (f) Cytoplasm (g) Mitochondrion (h) Ribosomes

(3)

Total-20

Homework 2- Cell Transport

5

21

6

3

7

4

8

9

5

6

Q7. Copy and complete the table below. Decide if each of the following statements is TRUE or FALSE and tick the appropriate box. If the statement is FALSE, write the correct word in the correction box to replace the word underlined in the statement.

(4)

Statement True False CorrectionMolecules of carbon dioxide move out of a respiring cell by diffusion.The carrier molecules that pump ions across a membrane are made of phospholipid.Red blood cells shrink when placed in distilled water.During active transport, energy is needed to move molecules along a concentration gradient from low to high concentration.

Total- 20

Homework 3- DNA

10

Q3. Calculate the percentage of guanine molecules which would be present in a DNA molecule of 6000 bases if 1200 are adenine. (Show your calculations) (2)

Q4. Where is mRNA made in a cell? (1)

Q5. What is the function of mRNA? (1)Q6. Where are proteins made in the cell? (1)

11

7

1 2

Q8. Name the 4 bases that are found on DNA. (1)

12

Q9. What composes the backbone of the DNA double helix? (1)

13

10

Total- 20

Homework 4- Proteins and Enzymes

14

21

3

15

4

Q5. Enzymes are made from protein, name another molecule that is made from protein.

(1)

16

6

17

7

8

1

Total-20

18

9

1

Homework 5- Genetic Engineering

19

2

1

3

20

21

4

22

5

6

Q7. The following steps are involved in the process of genetic engineering.

1. Insertion of a plasmid into a bacterial host cell.2. Use of an enzyme to cut out a piece of chromosome containing a desired gene.3. Insertion of the desired gene into the bacterial plasmid.4. Use of an enzyme to open a bacterial plasmid.Which is the correct sequence of these steps?

A. 4, 1, 2, 3 B. 2, 4, 3, 1

C. 4, 3, 1, 2 D. 2, 3, 4, 1 (1)

8. Genetic engineering can be used to transfer human genes to bacteria artificially.

Complete the boxes below to describe each of the steps carried out to transfer a human gene into a bacterial cell.

(3)

Step 1

23

Chromosome extracted from human cell and

required gene located

Bacterial cell carrying plasmid identified

Step 2

Step 3

Step 4

Q9. What is used to cut the desired gene from the chromosome? (1)

Total-20

24

Grow large numbers of the bacteria now containing required human gene.

Step 5

Homework 6- Respiration

25

4. Which of the following stages in respiration would result in the production of a large number of ATP molecules?

A Glucose to pyruvate

B Pyruvate to lactic acid

C Pyruvate to carbon dioxide and water

D Glucose to carbon dioxide and water

2

5

Q6.

a) State the end products of:

1. Aerobic respiration2. Fermentation in plants (2)

b) State the location of:

1. Aerobic respiration2. Fermentation (2)

c) Name a cellular process that ATP is required for. (1)

26

1

Q7.

b) How many times more energy is released from Type of cell respiration A compared to C? 1

27

8. The diagram shows apparatus used in an investigation of aerobic respiration in snails.

Lactate produced (g)

a) Describe a suitable control for this investigation. 1b) How could this experiment be made more reliable?

1

Total-20

28