11. Which among the following will be the consequence of destruction of all beta cells in the pancreas?
[A] Glucagon secretion will stop and blood glucose levels will increase
[B] Glucagon secretion will stop and blood glucose levels will decrease
[C] Glucagon secretion will stop and digestive enzymes will be secreted
[D] Insulin secretion will stop and blood glucose levels will increase
Show Answer
Correct Answer: D [ Insulin secretion will stop and blood glucose levels will increase]
Notes:
Beta cells secrete insulin. Destruction of beta cells in the pancreas will halt the production of insulin. Therefore, eliminate answer choices (A), (B) and (C). This will lead to an increase in blood glucose levels.
12. Which blood group is universal acceptor?
[A] O+
[B] AB+
[C] AB-
[D] O-
Show Answer
Correct Answer: B [AB+]
Notes:
AB +ve is the universal acceptor blood group or the universal receptors. Because AB+ individuals have all of the possible antigens and therefore are the universal acceptors as their immune system is used to seeing each of the antigens.
13. What is the role of Pneumatophores?
[A] Protect plant from animals
[B] Supports plant in standing upright
[C] Get oxygen for respiration
[D] Helps plant for pollination
Show Answer
Correct Answer: C [Get oxygen for respiration]
Notes:
Pneumatophores are specialized root structures that grow out from the water surface and facilitate the aeration necessary for root respiration in hydrophytic trees such as many mangrove species.
14. What is the time taken by the rashes to appear on the body of the patient after the Measles attack?
[A] One day
[B] Four days
[C] Six days
[D] One week
Show Answer
Correct Answer: B [Four days]
Notes:
Measles is a very infectious and potentially serious illness that is caused by a type of virus called paramyxovirus. It is spread from person to person by coughing, sneezing or sometimes kissing. Symptoms will usually begin to show 10 to 14 days after infection with the measles virus. A person with measles is infectious for 2-4 days before the rash appears (when there may be symptoms of fever and tiredness), and for up to 4 days after the rash has appeared.
15. Which of the following crops helps in nitrogen fixation?
[A] Rice
[B] Wheat
[C] Maize
[D] Beans
Show Answer
Correct Answer: D [Beans]
Notes:
Any legume plants will help in nitrogen fixation. Beans contain symbiotic bacteria called Rhizobia within nodules in their root systems, producing nitrogen compounds that help the plant to grow and compete with other plants. When the plant dies, the fixed nitrogen is released, making it available to other plants and this helps to fertilize the soil.
16. Which is not a parasite?
[A] Tick
[B] Housefly
[C] Bed bug
[D] Louse
Show Answer
Correct Answer: B [Housefly]
Notes:
Tick, beg bug and louse are parasitic insects that live on the skin of mammals or birds.
Housefly is not a parasite.
17. Which one of the following is useful for biological control of pests?
[A] Honey bees and locusts
[B] Scorpions and spiders
[C] Wasps and birds
[D] Parrots and kites
Show Answer
Correct Answer: B [Scorpions and spiders]
Notes:
Spiders, mites, scorpions, and several related groups are not insects, but belong to the arthropod class Arachnida. About 15 families of spiders are frequently encountered in crops, where they provide benefit as natural control agents.
18. The bats are able to fly in dark since their wings produce which of the following waves?
[A] Infrared rays
[B] Ultrasonic waves
[C] Sound waves
[D] Ultraviolet rays
Show Answer
Correct Answer: B [Ultrasonic waves]
Notes:
Bats can fly in dark because they. Bat echolocation is very much similar to a SONAR and is a perceptual system where ultrasonic sounds are emitted specifically to produce echoes.
19. Which among the following types of bees does not have commercial importance?
[A] Dammer bee
[B] The little bee
[C] The Indian hive bee
[D] None of the above
Show Answer
Correct Answer: D [None of the above]
Notes:
There are around 20,000 different species of bees in the world but only 7 of them are honeybees. Of them only five of them have commercial importance in India, they are as follows:
1. The rock bee
2. The Indian hive bee
3. The little bee
4. The European bee
5. Dammer bee
20. In the branch of biology which of the following deals with the Study of kidney?
[A] Nephrology
[B] Neurology
[C] Neonatology
[D] None of these
Show Answer
Correct Answer: A [Nephrology]
Notes:
Nephrology is a specialty of adult internal medicine and pediatrics that deals with the study of the kidneys, particularly normal kidney function (kidney physiology) and kidney disease.
