Biochemistry

Macromolecules are organic compounds made up of

• ATP only

• lipids and sugars only

• carbon, hydrogen and oxygen

• oxygen and hydrogen only

Tags

NGSS.HS-LS1-1

NGSS.HS-LS1-6

All of the following are functions of proteins EXCEPT:

• help to fight disease

• store and transmit heredity

• build tissues such as bone and muscle

• control the rate of reactions and regulate cell processes

What are subunits of DNA and their function?

• monosaccharide that provide quick energy for the cell

• proteins that provide building blocks for the structural components

• nucleotide that store information

• lipids that store energy and provide insulation

Enzyme influence chemical reactions in living systems by

• absorbing water released when polymers are formed

• providing the substrate required for the reaction to occur

• affecting the rate at which reactions occur

• combining with excess hydrogen to form gaseous wastes

Many enzymes in the human body function best at 37°C. What is the most likely result of a significant increase in body temperature?

• Enzymes become hormones.

• Enzymes become more active.

• Enzymes become more sluggish.

• Enzymes become denatured.

How are the functions of a carbohydrate and a lipid similar?

• Both dissolve nutrients in the digestive system.

• Both lower the activation energy of reactions.

• Both store genetic information.

• Both are a source of energy.

A biochemist is attempting to replicate a chemical reaction that commonly takes place in cells. During the chemical reaction, starch is broken down into glucose. What will most likely happen if the biochemist adds an enzyme to the reactants?

• The reaction will speed up

• The reaction will no longer take place

• The reaction will stop

• The reaction will slow down

Tags

NGSS.HS-PS1-5

According to Figure 2-3, at what temperature do the two enzymes have the same amount of activity?

• 10^oC

• 45^oC

• 25^oC

• 98^oC

These organic molecules are used by the body for long term storage of energy and make up the structure of cell membranes.

• Carbohydrates
• Lipids
• Proteins
• Nucleic Acids

Sugars usually end in....

• -ose
• -ace
• -ats
• -ids