Unit 2 Honors Biology Test

A biology student counted 2,500 onion root tip cells and collected the data in the picture. Which of the following is a valid conclusion based on the values included in the data table?

• Telophase lasts approximately twice as long as Anaphase.

• Metaphase and Anaphase are approximately equal in terms of duration.

• Prophase is the longest stage of the cell cycle.

• Interphase is much shorter, in terms of duration, that all of the other stages of the cell cycle.

Tags

NGSS.HS-LS1-4

Based on the table included above, which stage of the cell cycle takes the most amount of time to occur from start to finish?

• Prophase

• Metaphase

• Telophase

• Interphase

Tags

NGSS.HS-LS1-4

Based on the data in the table, what percentage of cells are in Interphase?

• 90

• 40

• 15

• 20

Tags

NGSS.HS-LS1-4

Enzymes are considered to be 

• Lipids
• Carbohydrate
• Protein
• Nucleic Acid

Tags

NGSS.MS-LS1-7

What is the purpose  of an enzyme?

• give permission for the reaction
• raise activation energy
• speed up reactions
• control how many reactions occur

Tags

NGSS.MS-LS1-7

What is structure A?

• Substrate
• Active site
• Enzyme
• Products

What 3 letters do enzymes typically end in?

• -ose
• -ase
• -ese
• -tic

Which of the following conclusions can be drawn from this graph?

• The optimum pH of the enzyme is 6.6.
  
• The optimum pH of the enzyme is 5.8
  
• The enzyme’s activity increases as pH increases 5.0 to 9.0
  
• The enzyme’s activity is greater around pH of 8.0 .
  

What makes an enzyme substrate specific?

• Size
• Shape
• Name
• Location it is found in

Enzymes are capable of increasing the rate of a chemical reaction within a living cell.  Enzymes accomplish this through which of the following means?

• reducing the number of products   
• reducing the activation energy
• increasing the temperature of the cell
• increasing the concentration of reactants 

Tags

NGSS.HS-PS1-4

NGSS.HS-PS1-5