Enzymes, Part 2 and Nucleic Acids

Multiple Choice

How do enzymes increase the speed of chemical reactions?

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

Multiple Choice

After the enzyme and substrate bind together and perform the reaction, what does the substrate become?

• a substrate
• an enzyme
• a product
• an active site

Multiple Choice

Letter C...

• active site
• enzymes
• substrate
• products

Denaturation: the misfolding of a protein when outside its optimal range

Nucleotides: the monomers for nucleic acids ​

Multiple Choice

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 .
  

Multiple Choice

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

• 15 C

• 40 C

• 30 C

• 50 C

Multiple Choice

What happens when enzymes are heated to a high temperature?

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

Multiple Choice

Which of the following denatures an enzyme?

• High Temperatures

• Incorrect pH

• Both

Multiple Choice

Enzymes are...

• nucleic acids
• proteins
• lipids
• carbohydrates

Multiple Choice

What is the difference between DNA and RNA from the point of view of the nitrogenous bases that are present in their nucleotides?

• In DNA, nucleotides can be made up of A, T, C, G. In RNA, nucleotides can also contain A, C or G; however, instead of T, they contain U.
• Purine and Pyrimidine
• Pyrimidine: Thymine, Cytosine (Urical)
• DNA, RNA

Multiple Choice

DNA and RNA are examples of...

• proteins
• nucleic acids
• carbohydrates
• lipids

Multiple Choice

What is the monomer of nucleic acids?

• Glycerol
• Monosaccharides
• Amino Acids
• Nucleotides

Multiple Choice

What are the components of a nucleotide?

• nitrogen base, phosphate group, and pentose sugar
• pentose sugar, purine, and pyrimidine
• nitrogen base and a phosphate group
• DNA, phosphate group, monosaccharide