Practice Questions

TLS Online TPP Program

#Question id: 5667

There may be an important connection between sperm translocation and capacitation. Which of the following option is correct explanation of above statement?

#Unit 5. Developmental Biology

The influx of bicarbonate ions (and possibly other ions) alkalinizes the sperm, raising its pH.
before entering the ampulla of the oviduct, the uncapacitated sperm bind actively to the membranes of the oviduct cells in the narrow passage (the isthmus) preceding it. This binding is temporary and appears to be broken when the sperm become capacitated.
The cholesterol efflux from the sperm cell membrane is thought to change the location of its “lipid rafts,” isolated regions that often contain receptor proteins that can bind the zona pellucida and participate in the acrosome reaction.
Capacitation is a transient event but translocation is not

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TLS Online TPP Program

#Question id: 14829

#Unit 2. Cellular Organization

A new drug is developed that inhibits formation of the flagellar filament by impairing production of the protein flagellin. Is this going to be a good drug?

TLS Online TPP Program

#Question id: 14830

#Unit 2. Cellular Organization

Proton motive force

TLS Online TPP Program

#Question id: 14831

#Unit 2. Cellular Organization

A spirochete is a member of the phylum Spirochaetota, which contains distinctive diderm gram-negative bacteria, most of which have long, helically coiled cells. Movement of spirochetes occurs by means of structures called

TLS Online TPP Program

#Question id: 14832

#Unit 2. Cellular Organization

The characteristic virulence factor of S. pneumoniae is

TLS Online TPP Program

#Question id: 14833

#Unit 2. Cellular Organization

The pneumococcal vaccine is directed against the

TLS Online TPP Program

#Question id: 14834

#Unit 5. Developmental Biology

Process by which a spatial and temporal pattern of cell activities is organized within the embryo so that a well-ordered structure develops: