Xavier Bio Final Review

Proteins are composed of what smaller building blocks?

• amino acids
• nucleic acids
• fatty acids
• nucleotides

Tags

NGSS.HS-LS1-6

Based on the graph, what is the optimum temperature for this enzyme? 

• 15 C
• 40 C
• 30 C

Tags

NGSS.HS-PS1-5

What happens when enzymes are heated to a high temperature?

• The enzymes die.
• The shapes of the enzyme are altered or denatured
• The enzymes' amino acid sequence changes.
• The enzymes remain the same

Enzymes are

• nucleic acids
• proteins
• lipids
• carbohydrates

Tags

NGSS.MS-LS1-7

Which is the strongest acid?

• ph of 1

• ph of 4

• ph of 7

• ph of 9

DNA and RNA are two types of

• proteins
• lipids
• carbohydrates
• nucleic acids

When a cell shrinks in size, what type of solution was added to it?

• Salt solution

• Tap water

• distilled water

• iodine solution

Tags

NGSS.MS-PS1-2

Cell membranes are said to be selectively permeable. Which statement best explains what selectively permeable means?

• The cell membrane prevents any harmful substance from entering the cell.
• The cell membrane lets certain substances enter the cell and keeps certain substances out of the cell.
• The cell membrane allows only large molecules to diffuse into the cell.
• The cell membrane has pores that let only water and glucose into the cell and carbon dioxide out.

Tags

NGSS.MS-LS1-2

Base your answer to the question on the diagram below and on your knowledge of biology. The diagram represents two solutions, A and B, separated by a selectively permeable membrane. Which statement best describes the outcome after 20 minutes?

• Solution A will contain approximately the same number of glucose molecules as solution B.
• Solution A will contain all of the water molecules.
• Solution B will remain unchanged.
• Solution B will lose all of the glucose molecules to solution A.

Tags

NGSS.MS-LS1-2

NGSS.MS-LS1-3

The diagram below represents a cell in water.  Formulas of molecules that can move freely across the cell membrane are shown.  Some molecules are located inside the cell and others are in the water outside the cell.

Based on the distribution of these molecules, what would most likely happen after a period of time?

• The concentration of O₂ will increase inside the cell.
• The concentration of CO₂ will remain the same inside the cell.
• The concentration of O₂ will remain the same outside the cell.
• The concentration of CO₂ will decrease outside the cell.

Tags

NGSS.MS-LS1-2