IB Biology

Enzymes are

• nucleic acids
• proteins
• lipids
• carbohydrates

Tags

NGSS.HS-LS1-1

Which of the following binds to the active site of an enzyme? 

• substrate
• product
• codon
• none of the above

An enzyme speeds up a chemical reaction in the cell, but can only be used once? 

• true
• false

Enzymes speed up chemical reaction by 

• destroying products
• lowering activation energy
• increasing activation energy 
• allowing reactions to process at their own speed

Based on the graph, what temperature does this enzyme work best? 

• 15 C
• 40 C
• 30 C

In the diagram, what is letter A? 

• product
• substrate
• enzyme-substrate complex
• active site

Which of the following statement suggests that the shape of an enzyme determines the enzyme's function? 

• enzymes can operate in a wide range of conditions
• enzymes are specific to a substrate
• enzymes are activated by neighboring molecules

The diagram shows the series of a reactions that convert lactose into a usable form .
If enzyme 4 is denatured (stops working), the levels of which substance will increase?

• Lactose
• Galactose
• Glucose-1-Phosphate

Refer to the graphic above: Amino acids can be joined together by removing H+ and OH- forming a protein and water. What is this process called? 

• dehydration synthesis
• hydrolysis
• photosynthesis

Tags

NGSS.HS-LS1-6

Which statement explains the effect of the inhibitor? 

• The inhibitor changes the shape of the active site preventing the substrate from attaching.
• the inhibitor causes the substrate to attach to the active site 
• the inhibitor has no effect on the enzyme 

Tags

NGSS.HS-PS1-2