Unit 1 - Warmup 4

The graph shows the action of trypsin at different pH levels.

Based on the data, what can be concluded?

• Trypsin works best around a pH of 6.

• Trypsin works best around a pH of 8.

• Trypsin does not work under acidic conditions.

• Trypsin does not function under basic conditions.

Chemical reactions in the human body are catalyzed when enzymes interact with substrates shown in the diagram.

What happens to the enzyme after the chemical reaction occurs?

• The enzyme is used up during the reaction, so it no longer exists.

• The enzyme is changed during the reaction, so it no longer works.

• The enzyme becomes a part of the product of the reaction, so it no longer exists.

• The enzyme is unchanged, so it can be reused when more substrate is available.

Tags

NGSS.HS-PS1-2

Enzymes catalyze chemical reactions in the human body. Which statement describes how enzymes work?

• They speed up chemical reactions by increasing the activation energy.

• They slow down chemical reactions by increasing the activation energy.

• They speed up chemical reactions by lowering the activation energy.

• They slow down chemical reactions by lowering the activation energy.

Tags

NGSS.HS-PS1-5

Enzymes are substances that catalyze chemical reactions. A change in the pH of the medium is known to decrease the activity of an enzyme. Which statement explains how a change in pH affects the activity of an enzyme?

• It alters the shape of the enzyme.

• It alters the density of the enzyme.

• It alters the solubility of the enzyme.   

• It alters the concentration of the enzyme.

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-5

The structural diagram demonstrates two joined amino acids. Which arrow points to the peptide bond?

• 1

• 2

• 3

• 4

Biomolecules contain a variety of atoms. Which biomolecule maintains a ratio of 1 carbon atom to 2 hydrogen atoms to 1 oxygen atom?

• lipid

• protein

• nucleic acid

• carbohydrate

Tags

NGSS.HS-LS1-6

The diagram shows the basic structure of a biomolecule.

Based on the structure, which material will dissolve this biomolecule the best?

• oil

• dilute alchohol

• water

• ionic solution

Proteins function to provide structure for tissues and organs. Which of the following are the building blocks of proteins?

• 
• 
• 
• 

Tags

NGSS.HS-LS1-6

Which best describes the importance of lipids to organisms?

• They provide keratin in hair and outer layers of the skin.

• They keep cellular organelles hydrated within an organism.

• They provide storage for cellular waste within an organism.

• They serve as cellular membrane components and as concentrated energy sources.

What are the components of each nucleotide?

• glucose, water, and cellulose

• adenine, thymine, and cytosine

• a phosphate group, a sugar molecule, and a nitrogen base

• a phosphate group, a five-carbon sugar, and an amino acid