Practice Questions

TLS Online TPP Program

#Question id: 5683

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: 29051

#Unit 10. Ecological Principles

Increase in the average body mass of animal population within a species with higher latitude is known as___

TLS Online TPP Program

#Question id: 10623

#Unit 10. Ecological Principles

What is the population growth per unit of time when r = 0.50, N = 100 and K = 1000. What is value of per capita growth rate when population growing at maximum rate?

TLS Online TPP Program

#Question id: 4726

#Unit 8. Inheritance Biology

Which of the following is incorrect regards genomic imprinting?

TLS Online TPP Program

#Question id: 2943

#Unit 2. Cellular Organization

Which of the following is NOT a mechanism by which G1/S cyclin-CDKs ensure progression through the cell cycle?

TLS Online TPP Program

#Question id: 21270

#Unit 12. Applied Biology

Which one of the following materials is a biomaterial?