31. What is a joint?
[A] A hinge
[B] A ball and socket
[C] The place where two bones are joined
[D] The place where tendons are fastened together
Show Answer
Correct Answer: C [The place where two bones are joined]
Notes:
The place where bones meet is called a joint.
There are two basic types of joints:
1. Movable joints, such as the elbow, knee, and shoulder joints, allow varying degrees of motion.
2. Fixed joints do not allow any movement of bones. The bones of the skull, except the jawbones, join in stable joints.
32. What causes East Coast Fever in cattle?
[A] Cryptosporidium parvum
[B] Theileria parva
[C] Escherichia coli
[D] None of these
Show Answer
Correct Answer: B [Theileria parva]
Notes:
East Coast fever (ECF) is caused by Theileria parva, a parasitic protozoan that lives in the white blood cells and red blood cells of its mammalian host and is transmitted by ticks.
33. Which of the following organs is majorly affected by hepatitis?
[A] liver
[B] heart
[C] kidney
[D] brain
Show Answer
Correct Answer: A [liver]
Notes:
The liver is majorly affected by hepatitis. It is a viral disease that causes anorexia of the liver, resulting in liver damage or jaundice.
34. Which of the following virus is also known as the common cold?
[A] Variola virus
[B] Rhinovirus
[C] Varicella zoster Virus
[D] Myxovirus
Show Answer
Correct Answer: B [Rhinovirus]
Notes:
Rhinovirus is also known as the common cold. This is also called RNA Virus.
35. Azolla enriches rice fields with nitrogen due to its association with?
[A] Anabaena
[B] Nostoc
[C] Rhizobium
[D] Frankia
Show Answer
Correct Answer: A [Anabaena]
Notes:
Azolla enriches rice fields with nitrogen due to its association with Anabaena.
36. The root nodules for nitrogen fixation of a non-legume tree are?
[A] Frankia
[B] Rhizobium
[C] Azotobacter
[D] Thiobacillus
Show Answer
Correct Answer: A [Frankia]
Notes:
The root nodules for nitrogen fixation of a non-legume tree are Frankia. It is a genus of nitrogen-fixing bacteria that live in symbiosis with actinorhizal plants.
37. GM rice is enriched with which of the following vitamin?
[A] K
[B] E
[C] A
[D] D
Show Answer
Correct Answer: C [A]
Notes:
GM rice is enriched with vitamins A. Genetically modified rice are strains of rice that have been genetically modified.
38. Which of the following is divalent cations are usually used to make competent cells?
[A] Carbon
[B] Nitrogen
[C] Copper
[D] Calcium
Show Answer
Correct Answer: D [Calcium]
Notes:
Calcium is divalent cations that are usually used to make competent cells.
39. The reagent used to test the presence of starch in leaves is ____:
[A] Millions reagent
[B] Fehlings solution
[C] Benedicts solution
[D] Iodine solution
Show Answer
Correct Answer: D [Iodine solution]
Notes:
The Iodine test is used to test for the presence of starch. Iodine solution– here iodine dissolved in an aqueous solution of potassium iodide and reacts with the starch producing a purple black color.
40. Why do the plant closes stomata when it does NOT need carbon dioxide for photosynthesis?
[A] To store carbon dioxide
[B] To prevent water loss
[C] To release stored oxygen
[D] None of the above
Show Answer
Correct Answer: B [To prevent water loss]
Notes:
Stomata are tiny openings or pores in plant tissue that allow for gas exchange. Stomata allow a plant to take in carbon dioxide, which is needed for photosynthesis. They also help to reduce water loss by closing when conditions are hot or dry. Stomata look like tiny mouths which open and close as they assist in transpiration.
