Yeast and Its Applications CDS Questions

CDS Biology

Yeast and Its Applications MCQ Questions


7.
Unlike most yeast species (such as Saccharomyces cerevisiae) that primarily reproduce by budding, the species Schizosaccharomyces pombe is notable for reproducing mainly by:
A.
Fragmentation
B.
Binary fission
C.
Conjugation exclusively
D.
Spore formation exclusively
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ANSWER :
B. Binary fission
8.
The asexual reproduction method most characteristic of common baker's/brewer's yeast (Saccharomyces cerevisiae), in which a small outgrowth develops and eventually separates from the parent cell, is called:
A.
Budding
B.
Conjugation
C.
Fragmentation
D.
Binary fission
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ANSWER :
A. Budding
9.
Under unfavourable environmental conditions, certain yeast species are capable of reproducing sexually through the formation of:
A.
Spores (such as ascospores)
B.
Gametes exclusively, without spore formation
C.
Conidia exclusively
D.
Seeds
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ANSWER :
A. Spores (such as ascospores)
10.
In terms of nutrition, yeast organisms obtain their nourishment by:
A.
Fixing atmospheric nitrogen directly
B.
Absorbing organic nutrients from their surrounding environment (heterotrophic/saprophytic nutrition)
C.
Synthesising their own food through photosynthesis
D.
Obtaining nutrients exclusively through a host organism as obligate parasites
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ANSWER :
B. Absorbing organic nutrients from their surrounding environment (heterotrophic/saprophytic nutrition)
11.
Yeast cells are most commonly found naturally occurring on which type of surfaces in nature?
A.
Deep ocean sediments exclusively
B.
Sugar-rich surfaces such as ripe fruits and flower nectar
C.
Dry, rocky desert surfaces exclusively
D.
Polar ice caps exclusively
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ANSWER :
B. Sugar-rich surfaces such as ripe fruits and flower nectar
12.
Regarding oxygen requirements, Saccharomyces cerevisiae is best described as:
A.
A facultative anaerobe, capable of surviving and generating energy both in the presence and absence of oxygen
B.
An organism with no requirement for any form of respiration
C.
An obligate aerobe, requiring oxygen at all times for survival
D.
An obligate anaerobe, which is killed by any exposure to oxygen
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ANSWER :
A. A facultative anaerobe, capable of surviving and generating energy both in the presence and absence of oxygen