Practice Questions

TLS Online TPP Program

#Question id: 5656

What is the cortical reaction, and why is it important?

#Unit 5. Developmental Biology

The cortical reaction is the entry of Ca2+ ions into the egg, which initiates development.
The cortical reaction is the exocytosis of the cortical granules during egg maturation, which contain the components of the zona pellucida.
The cortical reaction is the depolarization of the plasma membrane after sperm entry, which helps to block polyspermy.
The cortical reaction is the release of the cortical granules after sperm entry, which converts the vitelline membrane into the fertilization membrane which blocks polyspermy.

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TLS Online TPP Program

#Question id: 29073

#Unit 10. Ecological Principles

Given below is an ecological pyramid, which of the following statements about these pyramid is correct:

TLS Online TPP Program

#Question id: 11515

#Unit 10. Ecological Principles

The statistical study of populations is called

TLS Online TPP Program

#Question id: 2388

#Unit 2. Cellular Organization

the xylan backbone may be synthesized by a distinctly different group of synthases, including synthases named

TLS Online TPP Program

#Question id: 33372

#Unit 1. Molecules and their Interaction Relevant to Biology

All turns secondary structures are characterised by

a. Dihedral angle values

b. Hydrogen bonding

c. i+1 residues

TLS Online TPP Program

#Question id: 26810

#Unit 8. Inheritance Biology

Match the following;