Practice Questions

TLS Online TPP Program

#Question id: 2208

Which of the following statements is a reasonable explanation for why unsaturated fatty acids help keep a membrane more fluid at lower temperatures?

#Unit 2. Cellular Organization

The double bonds form kinks in the fatty acid tails, preventing adjacent lipids from packing tightly.
Unsaturated fatty acids have a higher cholesterol content, which prevents adjacent lipids from packing tightly.
Unsaturated fatty acids are more nonpolar than saturated fatty acids.
The double bonds block interaction among the hydrophilic head groups of the lipids.

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TLS Online TPP Program

#Question id: 5732

#Unit 8. Inheritance Biology

Consider a plant, such as maize, heterozygous for a paracentric inversion. The inversion is very small and a synapsed inversion loop does not occur in any of the cells. Which of the following statement is correct?

TLS Online TPP Program

#Question id: 1868

#Unit 4. Cell Communication and Cell Signaling

Which of the following is NOT helpful in the diagnosis of AIDS?

TLS Online TPP Program

#Question id: 12724

#Unit 6. System Physiology – Plant

In response to sudden, 5 to 10°C rises in temperature, plants produce a unique set of proteins referred to as heat shock proteins (HSPs). There are five classes of heat shock proteins found in plants such as;

HSP class

Examples (Arabidopsis / prokaryotic)

Cellular location

I) HSP100

a) AtTCP-1 / GroEL, GroES

i) Cytosol

II) HSP90

b) Various AtHSP22, AtHSP20, AtHSP18.2, AtHSP17.6 / IBPA/B

ii) mitochondria

III) HSP70

c) AtHSP101 / ClpB, ClpA/C

iii) chloroplasts