Question 1
Some form one students wanted to collect the following animals for study in the laboratory. State the suitable apparatus they should use
- Flying insects
- Crawling stinging insects
- Small animals from tree barks
Answer
- Sweep net
- Pair of forceps
- pooter
Question 2.
State the transport and synthetic roles of endoplasmic recticulum
- Transport role
- Synthetic role
Answer
- Rough Endoplasmic Recticulum – Transport proteins
- Smooth Endoplasmic Recticulum – Synthesise lipids
Question 3
- What is the significance of diffusion to plant pollution
- Explain movement of air molecules is not energy-driven process
Answer
- The insects that carry out pollution attracted by the smell from the flowers which leads to pollination
- The process is passive where particles move along a diffusion gradient
Question 4
The diagram below represents an organelle of a cell
- The insects that carry out pollution Identify the organelle
- Name the parts labeled A and B
- State the function of the above structure
Answer
- Cell membrane/plasma membran
- A - protein layer;
B - phospholipid layer -
- Encloses cell contents;
- Allow selective movement of substances in and out of the cell
Question 5
- Define the term respiratory quotient
- Give the end product of anaerobic respiration in animals
- Name the chemical compound formed in the mitochondria which is the source of energy
- Explain why fats are considered as the main respiratory substrate yet they yield a lot of energy when completely oxidized
Answer
- Is a ratio showing the relationship between the amount of carbon (IV) oxide produced and the amount of oxygen consumed in a given period of respiration
- Lactic acid
- Adenosine Triphosphate
-
- Fats are not soluble therefore cannot be easily transported to respiratory sites;
– Fats require more oxygen to be oxidized;