11. What does B denote in the term RBCs ?
[A] Build
[B] Blood
[C] Bloody
[D] Building
Show Answer
Correct Answer: B [Blood]
Notes:
The term RBC stands for Red Blood Cells (RBCs) which performs the function of transferring oxygen to other tissues of the body. The RBCs are also known as Red Blood Corpuscles.
12. Empedocles is related to which of the following theory of biology?
[A] theory of cell
[B] theory of natural selection
[C] theory of mutation
[D] theory of disease
Show Answer
Correct Answer: B [theory of natural selection]
Notes:
Empedocles formulated a theory of natural selection. He proposed that everything in existence is composed of different combinations of four elements: air, fire, water and earth.
13. Who among the following has given four kingdom classifications?
[A] Ernest Haeckel
[B] Copeland
[C] RH Whittaker
[D] Carolus Linnaeus
Show Answer
Correct Answer: B [Copeland]
Notes:
Copeland introduced the Four kingdom of classifications(Monera, Protista, Plantae and Animalia).
14. Which of the following is the largest group of the plant kingdom?
[A] Thallophyta
[B] Bryophyta
[C] Pteridophyta
[D] Euglena
Show Answer
Correct Answer: A [Thallophyta]
Notes:
The plant kingdom consists of 390,000 species known till date. The plant kingdom is divided into five major groups: Thallophyta, Bryophyta, Pteridophyta, Gymnosperms and Angiosperms.
15. 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.
16. Who among the following discovered the cytoplasm?
[A] Rudolf von Kölliker
[B] Camillo Golgi
[C] Christian de Duve
[D] Walther Flemming
Show Answer
Correct Answer: A [Rudolf von Kölliker]
Notes:
The term was introduced by Rudolf von Kölliker in 1863. It was originally synonymous with protoplasm, but later changed to mean cell matter and organelles outside the nucleus.
17. The lysogenic state is controlled by the activity of the regulatory region of the lambda phage genome, this region is called?
[A] immunity repressor
[B] immunity operon
[C] operon repressor
[D] none of these
Show Answer
Correct Answer: B [immunity operon]
Notes:
The lysogenic state is controlled by the activity of the regulatory region of the lambda phage genome, this region is called immunity operon.
18. Which of the following oncogenic virus was first detected?
[A] Rous sarcoma virus
[B] Epstein-Barr virus
[C] Herpes simplex virus type 2
[D] Human T cell leukaemia virus
Show Answer
Correct Answer: A [Rous sarcoma virus]
Notes:
Rous sarcoma virus(RSV) was discovered in 1911 by Peyton Rous.
19. How do pteridophytes differ from mosses?
[A] Independent gametophyte
[B] Dependent gametophyte
[C] Flagellate antherozoids
[D] Independent and dominant sporophyte
Show Answer
Correct Answer: D [Independent and dominant sporophyte]
Notes:
Pteridophytes differ from moss and seed plants in that both the generations are independent and dominant.
20. What is the main mode of nutrition in plants?
[A] autotrophic mode
[B] heterotrophic mode
[C] Parasitic mode
[D] Saprophytic mode
Show Answer
Correct Answer: A [autotrophic mode]
Notes:
The main mode of nutrition in plants is the autotrophic mode of nutrition and leaves of plants contain chlorophyll which helps them to make their own food.
