Download MUSINGU HIGH SCHOOL BIOLOGY DECEMBER 2013 HOLIDAY

MUSINGU HIGH SCHOOL
BIOLOGY DECEMBER 2013 HOLIDAY ASSIGNMENT
FORM ONE
1. Define the term species.
2. The diagram below represents a cell organelle.
a) Identify the above cell organelle.
b) Name the parts labelled.
C: …………………………………………………..
D: …………………………………………………..
3. a) State the difference between essential and non-essential amino acids.
b) Name the deficiency disease that results from lack of proteins in a persons diet
4. Two students were observing bacteria using two identical microscopes and identical slides.
Students A saw 10 bacteria while student B saw 50 bacteria.
a) Suggest a reason as to why they observed different numbers of bacteria.
b) Basing on your answer in (a) above, which of the following combinations would give
a wider field of view.
(i) Eye piece x 10 and objective x 20 or
(ii) Eye piece x10 and objective x 40?
5. State two ways in which the ileum is structurally adapted to the absorption of digested food.
6. State three importance of osmosis in plants.
7. Distinguish between haemolysis and plasmolysis.
8. a) What is the meaning of the following terms.
(i) Egestion
(ii) Secretion
(iii) Excretion
9 .Name the branch of Science that is concerned with the classification of living organisms.
(1mk)
10. State three properties of the cell membrane.
11. a) State three roles of fats in body of mammals.
b) Give one reason why it is possible to store lipids in the tissues of organisms
12. Why is the pancrease considered a dual gland?
13. State the function if cristae in mitochondria.
14. Explain the importance of roughage in the diet.
15. Study the figure below and answer the questions that follow.
a) Name the parts labeled B, C and D
b) State the function of part labeled A.
16 (a) What do you understand by the cell specialization as used in biology
(b) Name any two specialized cells in plants and state how each is modified.
17 The set up below was prepared by a form one student study it and answer the questions
that follow.
(a) After a few hours it was found that reducing sugars were present in the distilled
water. State what happened.
(i) Inside the tube shaped membrane
(ii) At the walls of the membrane
18. A form I student observed that she could see 7 cells along the diameter of her
field of view under the light microscope. If her field of view is 4.2 mm, calculate
the length of one cell in micrometers.
(2mks)
19.Explain the role of hydrochloric acid in protein digestion in the mammalian stomach.