11. Which of the following is a fibrous protein?
[A] Enzymes
[B] Keratin
[C] Haemoglobin
[D] Albumin
Show Answer
Correct Answer: B [Keratin]
Notes:
Keratin is a group of fibrous proteins occurring in hair, feathers, hooves, and horns. Keratins have coiled polypeptide chains that combine to form supercoils of several polypeptides linked by disulphide bonds between adjacent cysteine amino acids.
12. 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.
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 among the following is an autotroph?
[A] Honey bee
[B] Algae
[C] Grasshopper
[D] Butterfly
Show Answer
Correct Answer: B [Algae]
Notes:
Autotrophs are the organisms which are able to prepare their own food without depending on other organism. Auto means self and prophs means food. All the organisms which are capable of carrying photosynthesis are examples of autotrophs.
15. Who among the following is considered as the father of microbiology?
[A] Stephen Hales
[B] Antonie Van Leeuwenhoek
[C] Edwin John Butler
[D] Pier Antonio Micheli
Show Answer
Correct Answer: B [Antonie Van Leeuwenhoek]
Notes:
Antoine van Leeuwenhoek used the single-lens microscope he built to make the first observations of bacteria and protozoa. Leeuwenhoek is universally acknowledged as the father of microbiology.
16. Who introduced the three kingdoms of classification?
[A] RH Whittaker
[B] Ernest Haeckel
[C] Copeland
[D] Carolus Linnaeus
Show Answer
Correct Answer: B [Ernest Haeckel]
Notes:
Plantae, Protista and Animalia are the three kingdom of Classification introduced by Ernest Haeckel.
17. rRNA is synthesized by which of the following?
[A] Nucleus
[B] Nucleolus
[C] Golgi body
[D] Cytoplasm
Show Answer
Correct Answer: B [Nucleolus]
Notes:
Molecules of rRNA are synthesized by the nucleolus in a specialized region of the cell nucleus, which appears as a dense region within the nucleus and contains genes encoding rRNA.
18. 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.
19. The viruses in an attenuated vaccine?
[A] have no genome
[B] continue to replicate
[C] are usually larger than bacteria
[D] is altered with chemicals
Show Answer
Correct Answer: B [continue to replicate]
Notes:
The viruses in an attenuated vaccine continue to replicate. Attenuated vaccines do not usually cause disease like those caused by the wild form of the organism.
20. Which of the following is a common feature of protonema of multicellular fungi, filamentous algae, and mosses?
[A] way of nutrition
[B] diplomatic life cycle
[C] multiply by fragmentation
[D] members of the plant kingdom
Show Answer
Correct Answer: C [multiply by fragmentation]
Notes:
The protonema of multicellular fungi, filamentous algae and mosses all show multiplication by fragmentation.
