Cell Bio Exam 1 Review

Which macromolecule forms the basic structure of the cell membrane?

• Carbohydrates

• Phospholipids

• Nucleic acids

• Steroids

What is the primary chemical bond that holds the two strands of DNA together?

• Ionic bond

• Hydrogen bond

• Disulfide bond

• Peptide bond

Which property of water allows it to dissolve many substances?

• Nonpolarity

• High specific heat

• Polarity

• Low surface tension

Tags

NGSS.HS-ESS2-5

Which of the following is NOT a class of protein?

• Enzymes

• Hormones

• Lipids

• Structural proteins

Which of these is the strongest bond (almost permanent)?

• Ionic bond

• Disulfide bond

• Hydrogen bond

• Covalent bond

What is the main function of a selectively permeable membrane?

• To allow all substances to pass freely

• To block all substances

• To regulate the movement of substances in and out of the cell

• To provide energy for the cell

Which covalent modification involves the addition of a phosphate group to a protein?

• Methylation

• Phosphorylation

• Acetylation

• Glycosylation

What property of water allowed bugs to ‘walk’ on water?

• Hydrophilicity

• Surface tension

• Hydrophobicity

• High density as ice

Tags

NGSS.HS-ESS2-5

Which class of proteins is primarily responsible for catalyzing biochemical reactions?

• Structural proteins

• Enzymes

• Transport proteins

• Storage proteins

What is the repeating unit of DNA called?

• Amino acid

• Nucleotide

• Monosaccharide

• Fatty acid