11. What is common to the techniques (i) in vitro fertilisation, (ii) Cryo preservation and (iii) tissue culture?
[A] All are in situ conservation methods
[B] All are ex situ conservation methods
[C] All require ultra modern equipment and large space
[D] All are methods of conservation of extinct organisms
Show Answer
Correct Answer: B [All are ex situ conservation methods]
Notes:
In vitro fertilisation, cryo preservation and tissue culture all are ex situ conservation methods. Ex situ conservation is a technique of conservation outside natural habitats.
12. What is that gene called which have two or more than two characters?
[A] Duplicate gene
[B] Pleiotropic gene
[C] Polymeric gene
[D] Su-HW gene
Show Answer
Correct Answer: B [Pleiotropic gene]
Notes:
A single gene may have two or more phenotypic expressions or characters. The multiple phenotypic effect of a single gene is called pleiotropism. Hence the gene associated with this phenomenon is called Pleiotropic gene.
13. Which of the following diseases is hereditary? (UPSC Prelims 1987)
[A] Haemophilia
[B] Tuberculosis
[C] Cancer
[D] Dysentery
Show Answer
Correct Answer: A [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.
14. Francis Galton is related to which of the following science?
[A] Eugenics
[B] Microbiology
[C] Bryology
[D] Ecology
Show Answer
Correct Answer: A [Eugenics]
Notes:
Francis Galton is related to Eugenics. Galton defined eugenics as “the study of all agencies under human control which can improve or impair the racial quality of future generations”.
15. 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.
16. Name the signal that helps the protein to move in or out of the nucleus?
[A] Notch signal
[B] Paracrine signal
[C] Nuclear localization signal
[D] Chemical signals
Show Answer
Correct Answer: C [Nuclear localization signal]
Notes:
Nuclear localization signals are also known as nuclear-export signals. It helps in importing and exporting proteins into the nucleus through nuclear pores. These signals are the sequence of specific amino acids present on the protein.
17. Which of the following biomolecules is more widely distributed in the cell?
[A] Chloroplast
[B] RNA
[C] DNA
[D] Spaherosomes
Show Answer
Correct Answer: B [RNA]
Notes:
DNA and RNA are two types of nucleic acids. DNA is converted into RNA by the process of transcription. The three types of RNA are m-RNA, t-RNA and r-RNA.
18. Which of the following compounds is not found in protein?
[A] Carbon
[B] Hydrogen
[C] Sulfur
[D] Helium
Show Answer
Correct Answer: D [Helium]
Notes:
Protein is made up of amino acids and is the main bodybuilding biomolecule of our body. 75% of the body is made up of protein, The main compounds of protein are carbon, hydrogen, oxygen, nitrogen, and sulfur.
19. Which of the following is primarily associated with forage preservation?
[A] Lactobacillus bucheri
[B] Lactobacillus cacaonum
[C] Monosodium glutamate
[D] Lactobacillus casei
Show Answer
Correct Answer: A [Lactobacillus bucheri]
Notes:
Lactobacillus bucheri is a naturally occurring, lactic acid bacteria that has a crucial role in forage preservation. It’s associated with indirect silage fermentation, which results in the production of acetic acid that inhibits yeast, prevents heating, and extends the bunk life of silage. Other species like Lactobacillus cacao num and Lactobacillus casei do not exhibit this function and Monosodium Glutamate is a flavor enhancer, not a preservative.
20. What is a saprophytic bryophyte?
[A] Buxbaumia aphylla
[B] Ricciocarpus natans
[C] Riccia fluitans
[D] Radula sp
Show Answer
Correct Answer: A [Buxbaumia aphylla]
Notes:
Buxbaumia aphylla is a saprophytic bryophyte and does not produce abundant chlorophyll.
