Year :
2011
Title :
Biology
Exam :
WASSCE/WAEC MAY/JUNE
Paper 1 | Objectives
21 - 30 of 59 Questions
| # | Question | Ans |
|---|---|---|
| 21. |
The testes in male mammals descend into the scrotal sac because A. there is congestion in the lower abdomen B. they run the risk of being destroyed C. they need special support D. they require a relatively low temperature |
D |
| 22. |
Some animals return to water bodies to reproduce because A. natural enemies destroy their eggs on land B. water nourishes their embryos and their young ones C. they are close to their ancestors and imitate them D. the temperature on land is not suitable for the development of their embryos |
D |
| 23. |
Which of the following methods is appropriate for the cultivation of cassava? A. Budding B. Fragmentation C. Root cutting D. Stem cutting |
D |
| 24. |
What will be the chromosome number of the hybrid of two varieties of a plant with 36 chromosomes in the endosperm cell? A. 12 B. 24 C. 35 D. 48 |
C |
| 25. |
Kreb’s cycle occurs in the A. mitochondria B. cytoplasm C. nucleus D. ribosomes |
A |
| 26. |
The process whereby electrons are emitted from chlorophyll and returned to it unchanged is known as? A. non-cyclic phosphorylation B. photochemical reaction C. photophorylation D. cyclic photophorylatlion Detailed SolutionDuring cyclic photophosphorylation, the electrons are transferred back to P700 instead of moving into the NADP from the electron acceptor. This downward movement of electrons from an acceptor to P700 results in the formation of ATP molecules |
|
| 27. |
Which of the following statements about photosynthesis is not true? A. Plants can photosynthesize without an increase in dry weight B. Carbon dioxide is absorbed by the leaves in bright light C. oxygen is produced during photosynthesis from the breakdown of water D. Photosynthesis occurs in green plants |
A |
| 28. |
The removal of all the phloem tissues of the stem of a plant close to the root system for a long period of time is likely to A. provide more energy to the roots B. accumulate more starch in the roots C. cause the underground roots to develop buds D. cause the p ant to wither and die |
D |
| 29. |
Which of the following groups of substances are not six-carbon compounds? A. Glucose and lactose B. Lactose and cellulose C. Glucose, Lactose and Pyruvate D. Pyruvate and cellulose |
D |
| 30. |
The conversion of glucose to starch in the leaf during the day principally A. enables photosynthesis B. prevents osmotic problems C. enables the leaf to store the starch D. enables glucose to be used up |
C |
| 21. |
The testes in male mammals descend into the scrotal sac because A. there is congestion in the lower abdomen B. they run the risk of being destroyed C. they need special support D. they require a relatively low temperature |
D |
| 22. |
Some animals return to water bodies to reproduce because A. natural enemies destroy their eggs on land B. water nourishes their embryos and their young ones C. they are close to their ancestors and imitate them D. the temperature on land is not suitable for the development of their embryos |
D |
| 23. |
Which of the following methods is appropriate for the cultivation of cassava? A. Budding B. Fragmentation C. Root cutting D. Stem cutting |
D |
| 24. |
What will be the chromosome number of the hybrid of two varieties of a plant with 36 chromosomes in the endosperm cell? A. 12 B. 24 C. 35 D. 48 |
C |
| 25. |
Kreb’s cycle occurs in the A. mitochondria B. cytoplasm C. nucleus D. ribosomes |
A |
| 26. |
The process whereby electrons are emitted from chlorophyll and returned to it unchanged is known as? A. non-cyclic phosphorylation B. photochemical reaction C. photophorylation D. cyclic photophorylatlion Detailed SolutionDuring cyclic photophosphorylation, the electrons are transferred back to P700 instead of moving into the NADP from the electron acceptor. This downward movement of electrons from an acceptor to P700 results in the formation of ATP molecules |
|
| 27. |
Which of the following statements about photosynthesis is not true? A. Plants can photosynthesize without an increase in dry weight B. Carbon dioxide is absorbed by the leaves in bright light C. oxygen is produced during photosynthesis from the breakdown of water D. Photosynthesis occurs in green plants |
A |
| 28. |
The removal of all the phloem tissues of the stem of a plant close to the root system for a long period of time is likely to A. provide more energy to the roots B. accumulate more starch in the roots C. cause the underground roots to develop buds D. cause the p ant to wither and die |
D |
| 29. |
Which of the following groups of substances are not six-carbon compounds? A. Glucose and lactose B. Lactose and cellulose C. Glucose, Lactose and Pyruvate D. Pyruvate and cellulose |
D |
| 30. |
The conversion of glucose to starch in the leaf during the day principally A. enables photosynthesis B. prevents osmotic problems C. enables the leaf to store the starch D. enables glucose to be used up |
C |