11. Serology is related to which of the following statements?
[A] Study of dietetics
[B] Study of snakes
[C] Study of serum
[D] Study of seeds
Show Answer
Correct Answer: C [Study of serum]
Notes:
Serology is the study of blood serum (the clear fluid that separates when blood clots).
12. How many bacterial cells are there in the human body?
[A] around 28 trillion
[B] around 38 trillion
[C] around 48 trillion
[D] around 58 trillion
Show Answer
Correct Answer: B [around 38 trillion]
Notes:
The number of bacterial cells inside the human body is approximately 38 trillion. This is very close to the estimated 30 trillion human cells in the body.
13. Which of the following compounds is not found in protein?
[A] Carbon
[B] Hydrogen
[C] Sulfur
[D] Helium
Show Answer
Correct Answer: D [Helium]
Notes:
Protein is made up of amino acids and is the main bodybuilding biomolecule of our body. 75% of the body is made up of protein, The main compounds of protein are carbon, hydrogen, oxygen, nitrogen, and sulfur.
14. Which of the following can be done in the cultivation of plant viruses?
[A] tissue culture
[B] cultures of separated cells
[C] whole plants
[D] all of these
Show Answer
Correct Answer: D [all of these]
Notes:
The cultivation of plant viruses can be done in tissue culture, cultures of separated cells and whole plants.
15. Which of the following virus is covered?
[A] Adeno
[B] Herpes
[C] Polio
[D] None of these
Show Answer
Correct Answer: B [Herpes]
Notes:
The Herpesviridae are a large family of DNA viruses. It causes infections and some diseases in animals, including humans. Members of this family are also known as herpesviruses.
16. What is known as the exclusion of plant diseases by legislation?
[A] Disease resistance
[B] Plant quarantine
[C] Biological control of plant
[D] Cultural control
Show Answer
Correct Answer: B [Plant quarantine]
Notes:
Plant quarantine is defined as the legal enforcement of those measures. These are intended to prevent the spread of pests or to prevent further spread if they have already gained entry and are established in newly restricted areas.
17. Which of the following is a correct feature of a frog?
[A] jaws but no teeth
[B] eyes but no lids
[C] ears but no pinnae
[D] hands but no fingers
Show Answer
Correct Answer: C [ears but no pinnae]
Notes:
Frogs have eyes and they have 3 eyelids. The pinnae are the visible part of the ear that resides on the outside of the head, although they do have a middle ear called the tympanic cavity and an inner ear.
18. Frogs and toads are examples of which of the following amphibians?
[A] Anura
[B] Urodela
[C] Apoda
[D] None of these
Show Answer
Correct Answer: A [Anura]
Notes:
Frogs and toads are examples of Anura amphibians. There are about 3400 species of Anura in the world.
19. The mammals evolved from the reptile in the:
[A] Cretaceous
[B] Triassic
[C] Devonian
[D] Carboniferous
Show Answer
Correct Answer: B [Triassic]
Notes:
Mammals were derived in the Triassic Period from members of the reptilian order Therapsida. Triassic Period was about 252 million to 201 million years ago.
20. What is the role of dendrites in neurons?
[A] send messages from all the senses to the brain
[B] receive many signals from other neurons
[C] carry messages from the brain to all the muscles
[D] carry both sensory and motor nerves
Show Answer
Correct Answer: B [receive many signals from other neurons ]
Notes:
Nerve cells or neuron have extensive processes and are called dendrites. These occupy a large surface area of a neuron. They receive many signals from other neurons and contain special proteins that receive, process and transfer these to the cell body.
