1. Chlorophyll absorbs which of the wavelength of the Sun light ?
[A] Green & Blue
[B] Green & Red
[C] Red & Blue
[D] Red & Yellow
Show Answer
Correct Answer: C [Red & Blue]
Notes:
Chlorophyll absorbs red and blue light but reflects green light.
2. Which among the following are called Thrombocytes?
[A] RBC
[B] WBC
[C] Platelets
[D] Serum
Show Answer
Correct Answer: C [Platelets]
Notes:
Thrombocytes which are also called as platelets are a component of blood whose function is to react to bleeding from blood vessel injury by clumping, thereby initiating a blood clot.
3. Digestion is not a function of which of the following ?
[A] Biotin
[B] Pepsin
[C] Renin
[D] None of the above
Show Answer
Correct Answer: A [Biotin]
Notes:
Biotin also called vitamin H, vitamin B₇ or vitamin B₈ is a water-soluble B vitamin. It is also known as vitamin H. Biotin is not a used in the Digestion of food.
4. The animals of which of the following sets are collectively called as Elasmobranches?
[A] Shark, Skates and Rays
[B] Shark, Rays and Dolphins
[C] Shark, Skates and Dolphins
[D] Skates, Dolphins and Rays
Show Answer
Correct Answer: A [ Shark, Skates and Rays]
Notes:
The term Elasmobranches is a collective name for the sharks, skates and rays. Elasmobranches have a skeleton made of cartilage, no swim bladders and rough skin made up of small dermal dentils. Elasmobranches are renowned for their highly tuned senses.
5. Alzheimer's disease (AD) is caused due to deficiency of which of the following?
[A] Dopamine
[B] Kainic acid
[C] Acetylcholine
[D] Glutamic acid
Show Answer
Correct Answer: C [ Acetylcholine]
Notes:
Alzheimer's is caused by brain cell death. It is a neurodegenerative disease, which means there is progressive brain cell death that happens over a course of time. It is caused due to deficiency of acetylcholine.
6. Which of the following is a polymer of glucose?
[A] Starch
[B] Cellulose
[C] Both a and b
[D] None
Show Answer
Correct Answer: C [Both a and b]
Notes:
Both Starch and Cellulose are the polymers of glucose. Cellulose is a chief structural material of the plants. Both starch and cellulose are made by plants from glucose produced during photosynthesis.
7. Cereals are a rich source of which of the following?
[A] Starch
[B] Maltose
[C] Glucose
[D] Fructose
Show Answer
Correct Answer: A [Starch]
Notes:
Cereals which are made with puffed or powdered rice and refined wheat typically contain starch. Starch is the most common form of carbohydrate and typically found in staple grains like rice, wheat, and corn.
8. 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.
9. Who among the following devised the Technique IVF(In vitro Fertilization)?
[A] Robert Edwards
[B] Dr. Martin Cooper
[C] Edward Jenner
[D] Sir Frank Whittle
Show Answer
Correct Answer: A [Robert Edwards]
Notes:
The early influences on Robert Edwards’ approach to the scientific research that led to human IVF are described. He founded the first IVF programme for infertile patients and trained other scientists in their techniques.
10. Endoscopy, a technique used to explore the stomach or other inner parts of the body is based on the which of the following phenomenon? (UPSC Prelims 1999)
[A] Total internal reflection
[B] interference
[C] diffraction
[D] polarisation
Show Answer
Correct Answer: A [Total internal reflection]
Notes:
Endoscopy, a technique used to explore the stomach or other inner parts of the body is based on total internal reflection. The endoscopy procedure uses an endoscope to examine the interior of a hollow organ or cavity of the body. Unlike many other medical imaging techniques, endoscopes are inserted directly into the organ. There are many types of endoscopes.
