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TLS Online TPP Program

#Question id: 27378

Choose the correct statements
(i) Atomic number = number of protons + number of electrons
(ii)Mass number = number of protons + number of neutrons
(iiiAtomic number = number of protons = number of neutrons
(iv)Atomic number = number of protons = number of electrons

#Unit 1. Molecules and their Interaction Relevant to Biology
  1. (i) and (ii)

  2. (i) and (iii)

  3. (ii) and (iii)

  4. (ii) and (iv)
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TLS Online TPP Program

#Question id: 5555

#Unit 5. Developmental Biology

The formation of the fertilization envelope requires an increase in the cytosolic concentration of ________.
TLS Online TPP Program

#Question id: 5556

#Unit 5. Developmental Biology

Contact of a sea urchin egg with signal molecules on sperm causes the egg to undergo a brief ________.
TLS Online TPP Program

#Question id: 5557

#Unit 5. Developmental Biology

The plasma membrane of the sea urchin egg ________.
TLS Online TPP Program

#Question id: 5559

#Unit 5. Developmental Biology

During fertilization, the acrosomal contents ________.
TLS Online TPP Program

#Question id: 5560

#Unit 5. Developmental Biology

In a newly fertilized egg, the vitelline layer ________.
TLS Online TPP Program

#Question id: 5561

#Unit 5. Developmental Biology

In sea urchins, the "fast block" and the longer lasting "slow block" to polyspermy, respectively, are ________.