31. Haematuria is a disorder involving __
[A] Loss of haemoglobin in R.B.C.
[B] The loss of blood through the urine
[C] The increase in concentration blood urea
[D] Loss of glucose in urine
Show Answer
Correct Answer: B [The loss of blood through the urine]
Notes:
Haematuria is a disorder involving the loss of blood through the urine.
32. What is the function of Sertoli cells in the male reproductive system?
[A] help in the erection of the penis
[B] secrete male sex hormones
[C] carrier of man’s genes
[D] provide nutrition to germ cells
Show Answer
Correct Answer: D [provide nutrition to germ cells]
Notes:
Providing nutrition to germ cells is the function of Sertoli cells in the male reproductive system.
33. Where does the fertilization of the egg take place with the sperm?
[A] Ovaries
[B] Fallopian tubes
[C] Uterus
[D] Vagina
Show Answer
Correct Answer: B [Fallopian tubes]
Notes:
The fertilization of the egg with the sperm occurs in the fallopian tube.
34. Which of the following is correctly matched?
[A] Measles – Bacteria
[B] Influenza – Virus
[C] Tuberculosi – Protozoa
[D] Whooping cough – Fungi
Show Answer
Correct Answer: B [Influenza – Virus]
Notes:
Influenza is caused by Influenza Virus. Whereas Measles is also caused by viruses, Tuberculosi,s and Whooping cough is caused by bacteria.
35. Bioethanol is denatured alcohol that is also called __
[A] Ethylene
[B] Methylated spirit
[C] Ethylene glycol
[D] Methylene
Show Answer
Correct Answer: B [Methylated spirit]
Notes:
Bioethanol is denatured alcohol that is also called Methylated spirit. It is a liquid made from alcohol and other chemicals.
36. What are the two main technologies that enabled the birth of modern biotechnology?
[A] red biotechnology and green biotechnology
[B] classical and traditional biotechnology
[C] genetics and mathematics
[D] genetic engineering and maintenance of a sterile environment
Show Answer
Correct Answer: D [genetic engineering and maintenance of a sterile environment]
Notes:
Genetic engineering and maintenance of a sterile environment are the two main technologies that enabled the birth of modern biotechnology.
37. Epidermal cells of which part of plant often secrete a waxy water resistant layer on their outer surface?
[A] Aerial parts only
[B] Roots only
[C] Both aerial parts and roots
[D] Neither aerial parts nor roots
Show Answer
Correct Answer: A [Aerial parts only]
Notes:
The major role of epidermis is to protect all the parts of the plant. Epidermal cells on the aerial parts of the plant often secrete a waxy, water-resistant layer on their outer surface. This aids in protection against loss of water, mechanical injury and invasion by parasitic fungi.
38. Which of the following is an egg laying mammal?
[A] Bat
[B] Whale
[C] Leafy ant-eater
[D] Spiny ant-eater
Show Answer
Correct Answer: D [Spiny ant-eater]
Notes:
Monotremes are mammals that lay eggs instead of giving birth to live young like marsupials and placental mammals. Among living mammals they include the platypus and four species of echidnas (or spiny anteaters).
39. Animals adapted to life in air are called ____:
[A] Fossorial
[B] Arboreal
[C] Cursorial
[D] Volant
Show Answer
Correct Answer: D [Volant]
Notes:
Animals adapted to life in air are called volant. Arboreal means living in or connected with trees. These animals such as monkeys, squirrel can live both on land and in trees. However, for protection purposes, they prefer to live in trees than on land.
40. The term mitochondria was coined by ___:
[A] J E Salk
[B] Carl Benda
[C] Charles Laveran
[D] Antonie van Leeuwenhoek
Show Answer
Correct Answer: B [Carl Benda]
Notes:
The first observations of intracellular structures that probably represented mitochondria were published in the 1840s. Richard Altmann, in 1890, established them as cell organelles and called them “bioblasts”. The term “mitochondria” was coined by German microbiologist Carl Benda in 1898.
