Natural Selection can maintain a polymorphism when

a. heterozygote is fitter than the homozygote

b. Fitnesses of genotypes are negatively frequency dependent.

c. Fitnesses of genotypes are positive frequency dependent.

d. One homozygote is fitter than the heterozygote

TLS Online TPP Program

#Question id: 14733

#Unit 2. Cellular Organization

Staphylococci are coccus bacteria which usually occur in clusters. What is the benefit of being in cluster

TLS Online TPP Program

#Question id: 14734

#Unit 2. Cellular Organization

Among the following which bacteria shows corkscrew movement?

1. Treponema pallidum

2. Leptospira

3. Borrelia burgdorferi

4. Brachyspira pilosicoli

Which among the following combination is correct?

TLS Online TPP Program

#Question id: 14735

#Unit 2. Cellular Organization

Large surface are a to volume ratio of bacterial cell give advantage for

TLS Online TPP Program

#Question id: 14736

#Unit 2. Cellular Organization

In basal structure of flagella of gram positive bacteria?

1. L

2. P

3. S

4. M

Which combination is not found in above bacteria? Choose the option with both incorrect rings.

TLS Online TPP Program

#Question id: 14737

#Unit 2. Cellular Organization

Which structures are involved in formation of biofilms

TLS Online TPP Program

#Question id: 14738

#Unit 4. Cell Communication and Cell Signaling

Choose correct statements about Muscarinic receptors;

a. An acetylcholine analog, In activated condition, these receptors slow the rate of heart muscle contraction.

b .This type of receptor is coupled to a Gαi protein, and ligand binding leads to the opening of an associated K+ channel.

c .The subsequent influx of K+ ions from the cytosol causes an increase in the magnitude of the usual inside-negative potential across the plasma membrane that lasts for several seconds.