Organic Molecules

A biological molecule is analyzed, and it is discovered that the molecule is composed of several amino acids. Which of these identifies the biological molecule?

• it is a lipid
• it is a protein
• it is an unsaturated fat
• it is a  monosaccharide

Tags

NGSS.MS-LS3-1

Which is the best example of a monosaccharide?

• starch
• glucose
• cellulose
• glycogen

Which organic compounds necessary for life are formed by a sugar bonded to a phosphate group and a nitrogenous base?

• lipids
• proteins
• nucleic acids
• carbohydrates

Tags

NGSS.HS-LS1-6

Which is a least likely primary function of proteins?

• to act as an organic catalyst
• to supply short term energy
• to build and repair damaged cells
• to defend against foreign invaders

Alpha-amylase, an enzyme present in saliva, breaks down starch. Which food does it help to digest?

• milk
• candy
• steak
• potato

Tags

NGSS.MS-PS1-2

Which of these statements describes how monomers combine and create macromolecules?

• amino acids combine to make proteins
• glucose molecules combine to make nucleic acids
• nucleic acids combine to make starch
• proteins combine to make glucose

Tags

NGSS.HS-LS1-6

Which type of organic molecule should a person limit in order to lose weight?

• carbohydrates, because they store twice as much energy/gram. If they are not used, they will cause weight gain. 
• Lipids, because they store twice as much energy/gram. If they are not used, they will cause weight gain. 
• Carbohydrates, because they are nonpolar molecules and are insoluble in water.
• Lipids, because they are non polar and soluble in water. 

Which is an example of a lipid?

• fat
• starch
• glucose
• hemoglobin

Proteins are compounds formed in the cells of plants and animals. Which element is included in every protein molecule?

• calcium
• carbon
• fluorine
• sodium

Tags

NGSS.HS-LS1-6

Which is most likely being shown?

• amino acids
• chromosomes
• DNA
• RNA

Tags

NGSS.HS-LS1-1