Download form 1 april, 2012 holiday assignment questions

MUSINGU BOYS HIGH SCHOOL
BIOLOGY DEPARTMENT
FORM 1 APRIL, 2012 HOLIDAY ASSIGNMENT QUESTIONS
N/B: 1. The questions outlined herein summarise the concepts to be learnt in the topic of Cell
Physiology. It is therefore mandatory that all students read, understand and make
short notes about the aforementioned topic during the holiday before attempting the
questions. Revision of this assignment coupled with the scheduled experiments and
teaching of the topic during second term will help in easily understanding the concepts
2. Exam 1 of Term 2, May 2012 will cover ALL the concepts taught in the topics of
Introduction to Biology, Classification I and The Cell (Microscopy, parts and
functions of cell parts, cell specialization, Tissues, Organs and Organ systems)
1. Define the term cell physiology
(2 mks)
2. Explain the difference between:
a) Turgor pressure and wall pressure
(2 mks)
b) Osmotic pressure and osmotic potential
(2 mks)
2. Name two plants and two animal processes in which diffusion plays an important role
(4 mks)
3. Name the physiological process by which the following occurs:
a) Molecules such as amino acids and glucose enter the body cell
(2 mks)
b) Glucose and mineral salts are reabsorbed into the blood in kidney tubules
(1 mk)
c) Water is absorbed from the soil by the root hairs
(1 mk)
d) Carbon (IV) oxide moves from the body cells to the blood capillaries
(1 mk)
4. Name four factors affecting the rate of diffusion
(4 mks)
5. Explain the following terms:
a) Turgidity
(2 mks)
b) Crenation
(2 mks)
6. Explain why eating a meal with too much salt leads to the production of a small volume of
concentrated urine
(2 mks)
7. Why is osmosis considered a special form of diffusion?
(2 mks)
8. How can a plasmolysed plant cell be made turgid again?
(1 mk)
9. Explain why a red blood cell when placed in distilled water will swell till it bursts
(2 mks)
10. State three factors that affect the rate of active transport
(3 mks)
11. Explain what will happen to red blood cell when placed in a highly concentrated salt solution (2
mks)
12. Give the role of active transport in animals
(3 mks)
13. Distinguish between plasmolysis and haemolysis
(2 mks)
14. Explain why fresh water protozoa like Amoeba do not burst when placed in distilled water (2
mks)
15. Addition of large amounts of salt to soil in which plants are growing kills the plants. Explain (2
mks)
16. Give three properties of a cell membrane
(3 mks)
17. Distinguish between isotonic, hypotonic and hypertonic solutions
(3 mks)
Best Wishes and Holidays
MUSINGU BOYS HIGH SCHOOL
BIOLOGY DEPARTMENT
FORM 2 APRIL HOLIDAY ASSIGNMENT QUESTIONS, 2012
N/B: The questions outlined herein summarise the concepts to be learnt in the topic of
Respiration. It is therefore mandatory that all students read, understand and make
short notes about the aforementioned topic during the holiday before attempting the
questions. Revision of this assignment coupled with the scheduled experiments during
second term will suffice to declare the topic fully covered
1. The equation below represents oxidation of a certain food substance
2C5H98O6 + 145O2
102 CO2 + 98H2O + Energy
a) Calculate the respiratory quotient (RQ)
b) Suggests the possible food substrate
c) Give a reason for your answer in b) above
2. How is a mitochondrion adapted to its functions as a site for respiration?
3. a) Distinguish between aerobic and anaerobic respiration
b) Give the end products of:
(i) Aerobic respiration
(ii) Anaerobic respiration (in plants and animals)
c) Briefly explain how anaerobic respiration is utilized in industries
d) What factors affect the rate of respiration in animals?
4. What is the importance of respiratory quotient (RQ)?
5. Distinguish between obligate and facultative anaerobes
6. Why do obligate anaerobes die when exposed to plenty of oxygen?
7. The flow diagram below shows a summary of the process of respiration
(3 mks)
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(1 mk)
(3 mks)
(2 mks)
(2mks)
(5 mks)
(10 mks)
(5 mks)
(2 mks)
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(3 mks)
I
G
(i) Ethanol + Energy + Carbon (IV) Oxide
Pyruvic Acid
Kreb’s cycle
H
J
(ii) Lactic Acid + Energy
Carbon (IV) Oxide + Water + Energy
a. Name the raw material/substrate labelled I
b. Name the series of reactions labelled G
c. What conditions lead to the reactions progressing at H and J
d. Which groups of living organisms exhibit reactions (i) and (ii)?
e. Where in the cell does process G and J take place?
f. In which form is the energy produced stored?
8. Distinguish between respiration and gaseous exchange
Best Wishes and Holidays
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