General Science - Biology MCQs
11. The plant hormone Auxin is basically a ___?
[A] Weak Organic Acid
[B] Weak Inorganic Acid
[C] Weak Organic base
[D] Gaseous compound of carbon
Show Answer
Correct Answer: A [Weak Organic Acid]
Notes:
Auxins are a class of plant hormones with some morphogen-like characteristics. Auxin is basically a Weak Organic Acid and It is produced in the stem tip that promotes the elongation in the cells.
12. Which among the following is the most abundant organic compound in nature?
[A] Glucose
[B] Fructose
[C] Sucrose
[D] Cellulose
Show Answer
Correct Answer: D [Cellulose]
Notes:
Cellulose is the most abundant organic compound in nature. It is the main constituent of plant fiber. Plants contain on average 33% cellulose, and cotton is the purest form at 90%.
13. The Stomata in the aquatic plants is ________?
[A] Not Found
[B] Found & available on both the surfaces
[C] Found & available on upper surface only
[D] Found and available only on lower surface
Show Answer
Correct Answer: C [Found & available on upper surface only]
Notes:
The Stomata in the aquatic plants is found and available on upper surface only. Stomata are crucial for plant functioning as they play fundamental role in the regulation of gas exchange between the plant and its surrounding environment.
14. In Gymnosperms seeds are__________?
[A] Always naked
[B] Always covered
[C] Naked in some and covered in others
[D] Absent
Show Answer
Correct Answer: A [Always naked]
Notes:
Gymnosperms are called so because they have naked ovules / seeds. In terms of plant evolution, they are first seed-bearing plants. They are inferior to Angiosperms because in Angiosperms, the ovules are covered.
15. Which of the following Kingdom represents bacteria?
[A] Monera
[B] Protista
[C] Protozoa
[D] Metazoa
Show Answer
Correct Answer: A [Monera]
Notes:
The Monera kingdom contains unicellular organisms with a prokaryotic cell organization, like bacteria. They are single-celled organisms with no true nuclear membrane. The taxon Monera was first proposed as a phylum by Ernst Haeckel in 1866.
16. Hepatitis A which is the most common cause of jaundice in young people is an infection of liver by ________?
[A] Bacteria
[B] Virus
[C] Amoeba
[D] Prortozoan
Show Answer
Correct Answer: B [Virus]
Notes:
Hepatitis A which is the most common cause of jaundice in young people is an infection of liver by virus. It is transmitted through ingestion of contaminated food and water or through direct contact with an infectious person.
17. Enterobius vermicularis which affect the caecum and vermiform appendix is commonly called as ?
[A] Tapeworm
[B] Pinworm
[C] Threadworm
[D] Ringworm
Show Answer
Correct Answer: B [Pinworm]
Notes:
Enterobius vermicularis which affect the caecum and vermiform appendix is commonly called as Pinworm. Pinworms are tiny, narrow worms and are white in color and less than a half-inch long.
18. Which among the following is a character of Chloroplast which makes them qualified to self replication?
[A] Presence of DNA
[B] Presence of RNA
[C] Presence of Both DNA & RNA
[D] Absence of Both DNA & RNA
Show Answer
Correct Answer: C [Presence of Both DNA & RNA]
Notes:
Presence of Both DNA & RNA in Chloroplast makes them qualified to self-replication. Chloroplasts, like mitochondria, contain their own DNA. This DNA is inherited from their ancestor—a photosynthetic cyanobacterium that was engulfed by an early eukaryotic cell.
19. “Rumen” is a part of ____?
[A] Stomach
[B] Small Intestine
[C] Large Intestine
[D] Liver
Show Answer
Correct Answer: A [Stomach]
Notes:
The rumen which is also known as a paunch, forms the larger part of the reticulorumen, which is the first chamber in the alimentary canal of ruminant animals. Hence it is a part of stomach.
20. Artificial Kidney or blood dailyzer which is used in renal failure or Kidney disorders works on the principles of _________?
[A] Imbibition & Osmosis
[B] Plasmolysis & Osmosis
[C] Diffusion & osmosis
[D] Diffusion only
Show Answer
Correct Answer: C [Diffusion & osmosis]
Notes:
Hemodialysis is a procedure where a dialysis machine and a special filter called an artificial kidney, or a dialyzer, are used to clean your blood. It works on the principles of Diffusion & osmosis.
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