Question

1. Which of the following is an INCORRECT association between a molecule and its properties?

a. monosaccharide: hydrophillic

b. DNA: polymer of nucleotides

c. fatty acid: amphipathic

d. ATP: modified nucleotide in DNA and RNA

e. steroid: derived from cholesterol

2. Phospholipids within the plasma membrane:

a. form a bilayer with the non polar tails oriented on the outer edges and the polar heads in the center.

b. assemble themselves int structures called channels, to allow ions to cross the membrane

c. serve as a barrier to the passage of polar substances between the intracellular fluid and the extracellular fluid

Answer 1

Dear Student,

1) A Monosaccharides are hydrophilic as they have water loving hydroxyl group.

B, DNA is a polymer with monomer units of nucleotide so it is known as polynucleotide.

*C, This is the answer for this question as Fatty acids are Amphiphilic.

D, ATP is considered as a modified nucleotide as it has three phosphate groups

E, yes. Steroid hormones are derived from cholesterol .

2) Answer for this question is C - The Phosphobilipid layer allow passage of lipid soluble molecules and as a barrier to the charged and polar molecules.

How you are clear...