Living Environment Chemistry of Living Things Regents Review

Small molecules are combined to form larger molecules by the process of

• regulation

• synthesis

• excretion

• transport

Tags

NGSS.HS-LS1-6

The process of taking in and breaking down food into more usable parts is known as

• digestion
• respiration
• ingestion
• excretion

Tags

NGSS.MS-LS1-7

Which statement explains the importance of maintaining a constant internal environment to ensure proper enzyme functioning?

•  Changes in pH and temperature will cause the enzyme reaction rate to be too fast.
• Temperature and pH determine amino acid sequences in enzymes
• Changes in pH will change the genetic instructions of enzymes
• Increasing the temperature and pH can alter the specific shape of enzymes.

Tags

NGSS.HS-LS1-3

Which substance is an organic molecule?

• water
• oxygen
• starch

Which substance is an inorganic molecule?

• water
• starch
• DNA
• fat

Tags

NGSS.MS-PS1-1

An organic compound made of amino acids.

• protein

• carbohydrate

• nucleic acid

• lipid

Tags

NGSS.HS-LS1-6

A protein that speeds up the rate of biochemical reactions; an organic catalyst.

• enzyme

• carbohydrate

• lipid

• nucleic acid

A monosaccharide that is the primary source of cellular energy in most organisms. It is one of the basic building blocks of polysaccharide carbohydrates.

• glucose

• starch

• lipids

• amino acids

Tags

NGSS.HS-LS1-7

Which group contains only molecules that are each assembled from smaller organic compounds?

• proteins, water, DNA, fats

• proteins, starch, carbon dioxide, water

• proteins, DNA, fats, starch

• proteins, carbon dioxide, DNA, starch

The graph shows the effect of temperature on the relative rate of action of enzyme X on a protein.

Which change would not affect the relative rate of action of enzyme X?

• (1) the addition of cold water when the reaction is at 50°C

• (2) an increase in temperature from 70°C to 80°C

• (3) the removal of the protein when the reaction is at 30°C

• (4) a decrease in temperature from 40°C to 10°C

Tags

NGSS.HS-PS1-5