The cell membrane can be described most accurately as permeable to most small mo

Question

The cell membrane can be described most accurately as permeable to most small molecules but impermeable to larger ones. permeable to only larger molecules. permeable to all molecules. permeable to some molecules and impermeable to others. impermeable to all polar molecules. Which of the following is not a possible noncovalent interaction? hydrogen bonding ionic bonding van der Waals interactions hydrophobic interactions polar covalent bonding Which of the following is not a structural polysaccharide? glycogen peptidoglycan cellulose chitin All of the above are structural polysaccharides. Which of the following is not soluble in water? lipids sugars amino acids disaccharides nucleic acids All of the following are common functional groups found in biological molecules except phosphate groups. carbonyl groups. amino groups. sulfhydryl groups. butyl groups.

Explanation / Answer

8. A. Permeable to most small molecules and impermeable to larger ones.

9. E. Polar covalent bonding.

Rest of the options are all non covalent interactions.

10. A. Glycogen.

Glycogen is not the structural but storage polysaccharide. Rest are the structural polysaccharides. Peptidoglycan forms cell wall in bacteria, cellulose forms cell wall in plants and chitin forms cell wall in fungi.

11. A. Lipids.

Lipids are hydrophobic compounds insoluble in water.

12. A. Phosphate group.

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