Which of the following statement(s) is (are) true of transmembrane proteins?

a. All contain a hydrophobic α helix.

b. Some serve as membrane attachment sites for peripheral membrane proteins.

c. Some contain more than one membrane-spanning domain.

d. All are asymmetrically oriented in the lipid bilayer.

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#Question id: 2423

#Unit 2. Cellular Organization

What is the function of thymosin beta-4?

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#Question id: 12887

#General Aptitude

If the sum of three dimensions and the total surface area of a rectangular box are 12 cm and 94 cm2 respectively, then the maximum length of a stick that can be placed inside the box is

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#Question id: 14826

#Unit 2. Cellular Organization

An advantage of the smaller size of prokaryotes, compared to eukaryotes, is

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#Question id: 28488

#Unit 5. Developmental Biology

Limb bud is regionalized into which of the following functional domains?

a) progress zone

b) Marginal zone

c) zone of polarizing activity

d) apical ectodermal ridge

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#Question id: 194

#Unit 1. Molecules and their Interaction Relevant to Biology

Which does not return to its original form after each catalysis?