Life at a Molecular Level

The element of the water molecule is held together by which type of bond?

• Covalent bond

• Hydrogen bond

• Ionic bond

• Double bond

The molecules of water are able to form hydrogen bonds because,

• Hydrogen is more electronegative

• The water molecules is shaped like tetrahedron

• The bond that hold together the atoms in water molecules are polar covalent bonds

• The oxygen atom in a water molecules has a week positive charge

What determine the cohesiveness of the water molecules?

• Ionic bond

• Hydrogen bond

• Hydrophobic interaction

• Non polar covalent bond

All of the following are characteristics of monosaccharides except...

• Sweet-tasting

• Dissolve in water

• Insoluble in water

• Forming water crystal

Which of the following is NOT polysaccharide?

• Glycogen

• Starch

• Glucose

• Sucrose

Which of the following is true of both maltose and amylose?

• Both polysaccharides

• Both are oligosaccharides

Which of the following is TRUE about cellulose?

• It is a polymer composed of sucrose monomers

• It is a storage polysaccharides to supply energy in plant cell

• It is a major structural component of plant cell wall

• It is a major structural component of animal cell plasma membranes

Which of the following is the characteristics of saturated lipids which differentiate them from unsaturated lipids?

• They do not contain glycerol

• They contain only unbranched fatty acid

• They are composed only of unbranched glycerol

• They have no double bonds between their carbon atoms

The phosphate group in phospholipids is....

• Polar and hydrophilic

• Non- polar and hydrophobic

• Ionized in water

• Uncharged

Which bond is formed during the formation of the primary structure of a protein?

• Peptide bond

• Hydrogen bond

• Disulfide bond

• Phosphodiester bond

Tags

NGSS.HS-LS1-1