1. Diabetes insipidus (DI) caused by a deficiency of arginine vasopressin (AVP), also known as antidiuretic hormone (ADH). This hormone is secreted by which endocrine gland?
[A] Thyroid Gland
[B] Pituitary Gland (Hypophysis)
[C] Pancreas
[D] Liver
Show Answer
Correct Answer: B [Pituitary Gland (Hypophysis)]
Notes:
Diabetes insipidus (DI) is caused by a deficiency of arginine vasopressin (AVP), also known as antidiuretic hormone (ADH). Antidiuretic hormone is secreted by Pituitary Gland which is also called Hypophysis.
2. In which parts of the body glycogen is stored mainly ?
[A] cartilages & bones
[B] liver and muscles
[C] Spleen
[D] Lungs
Show Answer
Correct Answer: B [liver and muscles]
Notes:
Glycogen is stored mainly in liver and muscles. It is a multibranched polysaccharide of glucose. It serves as a form of energy storage in animals, fungi, and bacteria.
3. Who among the following first synthesized “gene” in a laboratory ?
[A] Arthur kornberg
[B] Hargobind Khorana
[C] Gregor Mendel
[D] Watson and crick
Show Answer
Correct Answer: B [Hargobind Khorana]
Notes:
Hargobind Khorana first synthesized “gene” in a laboratory. Hargobind Khorana was an Indian American biochemist who shared the 1968 Nobel Prize for Physiology or Medicine with Marshall W. Nirenberg and Robert W.
4. For respiration in deep sea, divers use mixture of:
[A] Oxygen and helium
[B] Oxygen and hydrogen
[C] Oxygen and carbon dioxide
[D] Oxygen, Helium & nitrogen
Show Answer
Correct Answer: D [Oxygen, Helium & nitrogen]
5. Why do birds not experience respiratory issues while flying at high altitudes?
[A] Their lungs are larger relative to body size
[B] They fly inactively at high altitudes
[C] None of the above is correct
[D] Birds possess additional air sacs
Show Answer
Correct Answer: D [Birds possess additional air sacs]
Notes:
Birds have unique respiratory systems with extra air sacs that provide continuous airflow and efficient oxygen exchange, even at high altitudes where air is thinner. These adaptations help birds avoid respiratory trouble during flight.
6. With reference to reproduction in plants, the "Double fertilisation" explains:
[A] how each single pollen grain is able to produce twin sperm cells
[B] how two pollen grains produce single sperm cells
[C] how two pollen grains produce two sperm cells
[D] how single pollen grain produces single sperm cell
Show Answer
Correct Answer: A [ how each single pollen grain is able to produce twin sperm cells]
Notes:
In Angiosperms plant reproduction, two structures are created: a zygote and the endosperm. A zygote will grow and develop into an embryo, or baby plant.The process of single pollen grain producing two sperm cells with one combining with egg to form a zygote and other to form endosperm is called double fertilization.
7. Which of the following is a non-poisonous snake?
[A] Python
[B] Hognose snake
[C] Garter snake
[D] Ribbon snake
Show Answer
Correct Answer: A [Python]
Notes:
Python is a non-poisonous snake. Pythons are large muscular snakes which grow up to 35 feet and weigh as much as 300 pounds. Pythons are well known for the way they kill their preys by squeezing then to death and then swallowing them all at once.
8. Which part of the plant gives us saffron?
[A] Petals
[B] Stigma
[C] Roots
[D] Stem
Show Answer
Correct Answer: B [Stigma]
Notes:
The dried stigmas (thread-like parts of the flower) are used to make saffron spice. It can take 75,000 saffron blossoms to produce a single pound of saffron spice. Saffron is largely cultivated and harvested by hand.
9. Synapse gap is present between which of the following?
[A] Brain and Spinal cord
[B] Two eyes
[C] Two Kidneys
[D] Two neurons
Show Answer
Correct Answer: D [Two neurons]
Notes:
Information from one neuron flows to another neuron across a synapse. The synapse contains a small gap separating neurons. The synapse consists of: a presynaptic ending that contains neurotransmitters, mitochondria and other cell organelles.
10. Which of the following are chlorophyll-bearing, simple, thalloid, autotrophic and largely acquatic(both fresh water and marine) organisms?
[A] Gymnosperms
[B] Bryophytes
[C] Pteridophytes
[D] Algae
Show Answer
Correct Answer: D [Algae]
Notes:
Algae is an informal term for a large, diverse group of photosynthetic eukaryotic organisms that are not necessarily closely related, and is thus polyphyletic.
