11. With reference to the blood in a normal person, which one of the following statements is correct?
[A] Compared to arteries, veins are less numerous and hold less of the body’s blood at any given time
[B] Blood cells constitute about 70 per cent of the total volume of the blood
[C] White Blood Cells (WBC) are made by lymph nodes only
[D] The blood has more platelets than WBC
Show Answer
Correct Answer: D [The blood has more platelets than WBC]
Notes:
Blood has more platelets than corpuscles. A microlitre of blood contains 5,000-10,000 of White blood cells (WBC) and 150,000-500,000 platelets.
12. Which among the following blood groups is referred as the universal donor blood group?
[A] O -ve
[B] O +ve
[C] AB -ve
[D] AB +ve
Show Answer
Correct Answer: A [O -ve]
Notes:
The person with O-ve blood group is considered as the universal donor. Whereas a person with O +ve is not a universal donor as O +ve consists of Rh(Rhesus) factor which makes it incompatible for Rh -ve bloods.
13. Deficiency in which among the following leads to goitre?
[A] Iodine
[B] Calcium
[C] Phosporous
[D] Zinc
Show Answer
Correct Answer: A [Iodine]
Notes:
Goitre is a disorder caused due to the deficiency of iodine. Malfunction of thyroid gland leads to goitre (Swelling of neck). It is due to the bulge of the thyroid gland.
14. Which gas is absorbed by the plants during photosynthesis?
[A] Oxygen
[B] Carbon dioxide
[C] Nitrogen
[D] Hydrogen
Show Answer
Correct Answer: B [Carbon dioxide]
Notes:
During the process of photosynthesis, plants take carbon dioxide and water and produces oxygen and glucose in the presence of light.
15. Which is the world’s smallest bird?
[A] Red-cheeked Cordon-Bleu
[B] Costa’s Hummingbird
[C] Bee Hummingbird
[D] Goldcrest
Show Answer
Correct Answer: C [Bee Hummingbird]
Notes:
Bee Hummingbird is the smallest bird in the world. It is only 2 to 2.4 inches long and weighs 0.056 to 0.071 ounces. This bird is also known as zunzuncito or Helena Hummingbird. This bird is native to Cuba. It is endemic to the entire Cuban archipelago. It is “Nearly Threatened” bird species according to IUCN Red List of Threatened Species.
16. The branch of biology dealing with the study of fungi is known as__?
[A] Phycology
[B] Mycology
[C] Cytology
[D] None of these
Show Answer
Correct Answer: B [Mycology]
Notes:
Mycology is the branch of biology that deals with the study of fungi, including their genetic and biochemical properties.
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. The study of cell biology is related to which of the following?
[A] the cell is the fundamental unit of life
[B] cell structure and function
[C] Both 1 & 2
[D] None of these
Show Answer
Correct Answer: C [Both 1 & 2 ]
Notes:
Cell biology is the study of cell structure and function. It revolves around the concept that the cell is the fundamental unit of life.
19. Why lysosomes are called suicidal bags?
[A] because it contains digestive enzymes
[B] because it contains endoplasmic reticulum
[C] because it contains Phospholipids
[D] None of these
Show Answer
Correct Answer: A [because it contains digestive enzymes]
Notes:
The lysosome is known as the suicide bag of the cell because it contains digestive enzymes.
20. Phylum Porifera is classified based on__.
[A] Branching
[B] Symmetry
[C] Spicules
[D] Reproduction
Show Answer
Correct Answer: C [Spicules]
Notes:
Phylum Porifera is classified based on Spicules. Porifera are a phylum composed of sponges, they lack true tissues, have no body symmetry, and are sessile.
