11. Which one of the following diseases is caused due to defective genes?
[A] Ulcer
[B] Haemophilia
[C] Diabetes
[D] Cancer
Show Answer
Correct Answer: B [Haemophilia]
Notes:
Haemophilia is a mostly inherited genetic disorder that impairs the body’s ability to make blood clots, a process needed to stop bleeding. This results in people bleeding longer after an injury, easy bruising, and an increased risk of bleeding inside joints or the brain.
12. Which vitamin is also called as “Pantothenic acid”?
[A] Vitamin K
[B] Vitamin D
[C] Vitamin B3
[D] Vitamin B5
Show Answer
Correct Answer: D [Vitamin B5]
Notes:
Vitamin B5 is also called as Pantothenic acid and it was discovered by Roger J.Williams in 1933. Chemical formula for Vitamin B5 is C9H17NO5.
13. Who were the first scientists successfully isolated insulin in 1921?
[A] Frederick Banting and Charles Herbert Best
[B] Robert Hooke and Gregor Mendel
[C] Charles Darwin and Antonie van Leeuwenhoek
[D] Rachel Carson and Theodor Schwann
Show Answer
Correct Answer: A [Frederick Banting and Charles Herbert Best]
Notes:
Insulin was the first peptide hormone discovered. Canadians Frederick Banting and Charles Herbert Best were the first scientists successfully isolated insulin from the dog pancreas in 1921. They achieved this tremendous feat while working in Canada’s University of Toronto J.J.R. Macleod Laboratory.
14. Which of the following whales can be easily identified by the white calluses on their heads?
[A] Humpback Whale
[B] Antarctic Minke Whales
[C] North Atlantic Right Whale
[D] None of the above
Show Answer
Correct Answer: C [North Atlantic Right Whale]
Notes:
The North Atlantic right whale is a baleen whale. At present, they are among the most endangered whales in the world. They feed on plankton and are usually found in coastal waters.
15. The science of taxonomy is related to which of the following?
[A] Plant Classification
[B] Animal Classification
[C] Microorgranism
[D] None of these
Show Answer
Correct Answer: A [Plant Classification]
Notes:
The science of taxonomy is related to Plant Classification. Carl Linnaeus is the father of modern Taxonomy. Linnaeus, in his book System Naturae, has divided all living beings into two kingdoms – the plant kingdom and the animal kingdom.
16. Which of the following was invented by Jonas Salk?
[A] Polio Drop
[B] Polio Vaccine
[C] BCG Vaccine
[D] aspirin
Show Answer
Correct Answer: B [Polio Vaccine]
Notes:
The first effective polio vaccine was developed in 1952 by Jonas Salk. Polio, or poliomyelitis, is a disabling and life-threatening disease caused by the poliovirus.
17. Which of the following cell organelles does not contain DNA?
[A] Nucleus
[B] Mitochondria
[C] Lysosomes
[D] Chloroplast
Show Answer
Correct Answer: C [Lysosomes]
Notes:
Lysosomes and vacuoles do not contain DNA. Mitochondria and chloroplasts have their own DNA.
18. Which among the following is the sweetest sugar?
[A] Fructose
[B] Glucose
[C] Lactose
[D] Ribose
Show Answer
Correct Answer: A [Fructose]
Notes:
Fructose is a monosaccharide and is considered the sweetest sugar. It is mainly found in fruits, juices, honey and some vegetables. Like apple, onion, potato etc.
19. The sporophytic generation is represented only by the zygote__?
[A] Funaria
[B] Chlamydomonas
[C] Pinus
[D] Pinus
Show Answer
Correct Answer: B [Chlamydomonas]
Notes:
Important Features of Chlamydomonas: The plant body is unicellular, pear-shaped, and biflagellate, Each cell typically contains a cup-shaped chloroplast, an eye sac, and two contractile vacuoles, Pamela-stage appearance, Asexual reproduction occurs through biflagellate zoospore formation.
20. Which plant tissue consists of phloem and xylem?
[A] Complex Permanent Tissue
[B] Simple Permanent Tissue
[C] Parenchyma Tissue
[D] Collenchyma Tissue
Show Answer
Correct Answer: A [Complex Permanent Tissue]
Notes:
Complex Permanent Tissue tissues include phloem and xylem. Xylem helps in the transport of water and soluble components.
Phloem helps in the transportation of food particles.
