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TLS Online TPP Program

#Question id: 5669

What is the reproductive difference between sea urchins and mammals is?

#Unit 5. Developmental Biology

  1. The sea urchin egg completes meiosis prior to fertilization, but meiosis in mammals is completed after fertilization

  2. Sea urchin eggs and sperm are of equal size, but human eggs are much bigger than mammal’s sperm

  3. Sea urchins, but not mammals, have a need to block polyspermy, because only in sea urchins can there be more than one source of sperm to fertilize the eggs

  4. Sea urchin zygotes get their mitochondria from the sperm, but mammals zygote get their mitochondria from the egg.

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TLS Online TPP Program

#Question id: 363

#Unit 1. Molecules and their Interaction Relevant to Biology

What is the pH of a mixture of 0.042 M NaH2PO4 and 0.058 M Na2HPO4? If 1.0 mL of 10.0 M NaOH is added to a liter of the buffer prepared, how much will the pH change? (pKa = 6.86)
TLS Online TPP Program

#Question id: 18793

#Unit 13. Methods in Biology

Which of the following Assay can measure cell proliferation or cell death or active cells
TLS Online TPP Program

#Question id: 11958

#Unit 7. System Physiology – Animal

Fat digestion yields fatty acids and glycerol, whereas protein digestion yields amino acids; both digestive processes ________.
TLS Online TPP Program

#Question id: 175

#Unit 1. Molecules and their Interaction Relevant to Biology

The ionic charges associated with a protein molecule are ________.
TLS Online TPP Program

#Question id: 4801

#Unit 8. Inheritance Biology

You set up a mapping cross involving two genes in Aspergillus and determine the following percentages of tetrad types: parental ditype 51%, nonparentalditype 49%. What can you say about your genes?