Pages in this set

Page 1

Preview of page 1
1. State the maximum magnification that can be achieved by a light microscope and a
transmission electron microscope.

Select your answers from the list below.

10x 40x 100x 400x 1500x 25 000x 50 000x 500 000x

light microscope ................................... x

transmission electron microscope ................................... x
[Total 2 marks]




2. Describe…

Page 2

Preview of page 2
(i) State one function of xylem tissue.

.........................................................................................................................

.........................................................................................................................
[1]




(ii) The spiral band in the xylem vessel shown in the figure above contains a
substance called lignin.

State the function of this spiral band of lignin and explain why it is important that
the xylem vessel becomes lignified in…

Page 3

Preview of page 3
4. (i) Explain what is meant by the term tissue.

.........................................................................................................................

.........................................................................................................................

.........................................................................................................................

.........................................................................................................................
[2]




(ii) Name one type of epithelial tissue found in the lungs.

.........................................................................................................................

.........................................................................................................................
[1]
[Total 3 marks]




5. Explain why the lungs can be considered to be an organ.

..................................................................................................................................

..................................................................................................................................

..................................................................................................................................

..................................................................................................................................
[Total 2…

Page 4

Preview of page 4
6. In the lungs, goblet cells secrete mucus. The mucus is then moved by cilia.

Name one cellular structure from the list below that is associated with each of the
following functions. You must select a structure once only.

mitochondria ribosome Golgi vesicle centriole nucleus cytoskeleton

(i) release of energy…

Page 5

Preview of page 5
8. Membranes contain a variety of proteins. Some of these proteins are combined with
carbohydrates to form glycoproteins.

Describe the functions of glycoproteins in the cell surface membrane.

In your answer you should use appropriate technical terms, spelt correctly.

..................................................................................................................................

..................................................................................................................................

..................................................................................................................................

..................................................................................................................................

..................................................................................................................................

..................................................................................................................................

..................................................................................................................................

..................................................................................................................................

..................................................................................................................................

..................................................................................................................................

..................................................................................................................................…

Page 6

Preview of page 6
9. The figure below shows a potometer, a piece of apparatus used for estimating the rate
of transpiration.




leafy shoot
water
reservoir

capillary tube screw
clip

air-water rubber tubing
meniscus



(a) State one essential component of the apparatus, not shown in the figure above,
that must be added before any…

Page 7

Preview of page 7
(c) A student used the apparatus shown in the figure above to investigate how
transpiration rates vary during the day. The student placed the potometer on a
window ledge in the laboratory and estimated the rate of transpiration four times
during the day.

The results are shown in the table…

Page 8

Preview of page 8
(iii) Suggest two possible reasons, other than light and temperature, why the
rate of transpiration was lower in the afternoon than in the morning.

1 .............................................................................................................

................................................................................................................

2 .............................................................................................................

................................................................................................................
[2]




(iv) Explain why the potometer only gives an estimate of the rate of
transpiration.

................................................................................................................

................................................................................................................

................................................................................................................

................................................................................................................
[2]…

Page 9

Preview of page 9
(ii) State two other ways in which the wall of an artery is different from the wall of a
vein.

1 ......................................................................................................................

.........................................................................................................................

2 ......................................................................................................................

.........................................................................................................................
[2]
[Total 3 marks]




11. (i) Blood in the arteries has a high hydrostatic pressure.

State how this hydrostatic pressure is generated in the…

Page 10

Preview of page 10
(iii) Capillaries have walls that are one cell thick.

The figure below shows how the hydrostatic pressure of the blood changes as it
moves through a capillary.

The figure below also shows the water potential of the blood, due largely to the
plasma proteins, which tends to move water into…

Comments

DARCY NEWMARK

Report

pleaaaaase repost it!!! would be very helpful 

Similar Biology resources:

See all Biology resources »