1. In which of the following plants, you can find Leghemoglobin?
[A] Wheat
[B] Soyabean
[C] Potato
[D] Brinjal
Show Answer
Correct Answer: B [Soyabean]
Notes:
Legume nodules possess special protein called LEGHEMOGLOBIN. The synthesis of leghemoglobin is the result of symbiosis because neither bacteria alone nor legume plant alone possess the protein
2. Which among the following is the most common method of pollination in flowers without petals?
[A] Wind
[B] Water
[C] Insects
[D] All of above
Show Answer
Correct Answer: A [Wind]
Notes:
Wind is the most common media of pollination in flowers without petals. Pollination refers to the transfer of pollen from a male part of a plant to a female part of a plant which enables fertilisation and the production of seeds, most often by an animal or by wind.
3. Which among the following plant hormone plays most important role in establishing dormancy in seeds?
[A] Ethylene
[B] Gibberellic acid
[C] Abscisic Acid
[D] Auxin
Show Answer
Correct Answer: C [Abscisic Acid]
Notes:
Abscisic Acid plays the most important role in establishing dormancy in seeds. Abscisic Acid has also been found to be present in metazoans, from sponges up to mammals including humans.
4. Out of Diphtheria, Whooping cough, Typhoid , Diarrhea & Malaria which is not caused by bacteria?
[A] Whooping Cough
[B] Typhoid
[C] Malaria
[D] None of the above
Show Answer
Correct Answer: C [Malaria]
Notes:
Malaria (It is a disease caused by Protozoa Plasmodium family)
5. The hard part of a stem of a plant is because of ________?
[A] Sclerenchyma
[B] Xylem
[C] Pholem
[D] Stomata
Show Answer
Correct Answer: B [Xylem]
Notes:
The hard part of a stem of a plant is because of Xylem. Stem supports leaves, flowers and fruits. It also transports fluids between the roots and the shoots in the xylem and phloem, stores nutrients, and produces new living tissue.
6. Which among the following is NOT a true bast fiber?
[A] Jute
[B] Hemp
[C] Flax
[D] Cotton
Show Answer
Correct Answer: D [Cotton]
Notes:
Please note that Bast Fibers are obtained from Phloem
7. The natural Pacemaker in the Human Heart is located in the SA node which is present in which among the following chambers?
[A] Right Auricle
[B] Left Auricle
[C] Right Ventricle
[D] Left Ventricle
Show Answer
Correct Answer: A [Right Auricle]
Notes:
The natural Pacemaker in the Human Heart is located in the SA node which is present in right auricle chamber. It’s a small mass of specialized cells located in the top of the right atrium i.e., the upper chamber of the heart.
8. ‘Pace-maker’ is associated with which of the following body organs?
[A] Liver
[B] Brain
[C] Heart
[D] Lungs
Show Answer
Correct Answer: C [Heart]
Notes:
A pacemaker is a small device that’s placed in the chest or abdomen to help control abnormal heart rhythms. This device uses electrical pulses to prompt the heart to beat at a normal rate.
9. Night Blindness is caused by deficiency of which of the following Vitamins?
[A] Vitamin C
[B] Vitamin K
[C] Vitamin A
[D] Vitamin B
Show Answer
Correct Answer: C [Vitamin A]
Notes:
Night blindness is caused by nearsightedness, cataracts, or vitamin A deficiency. Night blindness (nyctalopia) is the inability to see well at night or in poor light. Its causes include glaucoma medications and cataracts
10. Why honey bees are called social insects? (UPSC Prelims 1982)
[A] They visit all flowers to collect nectar
[B] They live in large family groups
[C] They depend for their food upon other insects
[D] They move socially with other insects
Show Answer
Correct Answer: B [They live in large family groups]
Notes:
Social insects are highly evolved insects that engage in a variety of complex tasks not practiced by the multitude of solitary insects. Honey bees are social insects because they live together in large, well-organized family groups. A single honeybee cannot grow or survive by itself. The three distinct kinds of honeybees in a colony are queen, worker, and drone.
