Membranes

Unsaturated fatty acids from animals are

• All cis-

• Predominantly cis-, some trans-

• Predominantly trans-, some cis-

• Equimolar cis- and trans-

Which fatty acid oxidizes more rapidly?

• linoleic

• linolenic

• palmitic

• oleic

Membrane-spanning α-helices usually comprise

• 20-30 amino acid residues

• 10-20 amino acid residues

• 30-40 amino acid residues

• 20-40 amino acid residues

Glucose is transported inside the cell predominantly by

• ATPase

• Passive diffusion

• Transport is negligible

• Permease

Na,K-ATPase moves per catalytic cycle

• Three Na⁺ in, three K⁺ out

• Two Na⁺ in, three K⁺ out

• Three Na⁺ out, two K⁺ in

• Na,K-ATPase shows a random stoichiometry

Insulin receptor is a

• tyrosine kinase

• serine kinase

• threonine kinase

• aspartate kinase