TLS Online TPP Program

#Question id: 115


Which of the following is true of sphingolipids?

#Unit 1. Molecules and their Interaction Relevant to Biology
  1. Cerebrosides and gangliosides are sphingolipids.

  2. Phosphatidylcholine is a typical sphingolipid.

  3. They always contain glycerol and fatty acids.

  4. They contain two esterified fatty acids.

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TLS Online TPP Program

#Question id: 28451

#Unit 5. Developmental Biology

 Which of the following cell divide to form the central vulval cells?

TLS Online TPP Program

#Question id: 3417

#Unit 11. Evolution and Behavior

In balancing selection, two or more alleles are kept in balance, and therefore are maintained in a population over the course of many generations. Which of the following example can support balancing natural selection?

A- Sickle cell allele kept in balance because heterozygotes have greater chance of survival if infected by the malarial parasite, compared with normal homozygotes

B. One morph has selective advantage over another morph

C. One homozygote has greater chance of survival than other genotype results in purity of population

D. many species of invertebrates exist as different colored forms, identical in all respects except color. Visually searching predators often develop a search image for one color form, usually the commoner

TLS Online TPP Program

#Question id: 1297

#Unit 4. Cell Communication and Cell Signaling

What effect might an injection of RGD peptide have on tumor cells moving through the blood/lymph system?

TLS Online TPP Program

#Question id: 29012

#Unit 7. System Physiology – Animal

Active transport of Ca2+ and PO43– is increased by a metabolite of vitamin D from__

TLS Online TPP Program

#Question id: 12337

#Unit 10. Ecological Principles

Which of the following levels of organization is arranged in the correct sequence from most to least inclusive?