Proteins and Enzymes

Multiple Select

What elements are found in Polypeptides?

• Carbon

• Hydrogen

• Oxygen

• Nitrogen

• Phosphate

Multiple Select

Which is a function of proteins? (select all that apply)

• Speed up chemical reactions

• cellular structure

• cell communication and recognition

• Provide quick energy access

Multiple Choice

WHich statement is true about proteinsh

• Proteins are composed of amino acids which vary in R groups

• Proteins are made from polysaccharides which vary in C groups

• Proteins are made from nucleotides which vary in N bases

Multiple Choice

What is the type of bond that builds amino acids into proteins?

• Hydrogen bond

• Peptide bond

• Amino Bond

• Covalent Bond

Multiple Choice

The shape or structure of a molecule like protein determines the ......

• function

• avilability

• monomers

• energy quantity

Multiple Select

Which are enzymes?

• Catalase

• Lactose

• Disaccharide

• Glucose

• Lipase

Multiple Choice

Why is an enzyme considered a biological catalyst?

• Speeds up reactions by lowering activation energy

• Speeds up reactions by increasing activation energy

• Slows down reactions by lowering activation energy

• Slows down reactions by increasing activation energu

Match

Match the following

• Protein

  polymer

• Carbohydrate polymer

• Carbohydrate monomer

• Protein

  monomer

• Nucleic Acids

  monomer

Enzyme

Starch

Glucose

Amino acids

Nucleotides

• Enzyme

• Starch

• Glucose

• Amino acids

• Nucleotides

Multiple Choice

Which part of the graph shows a reaction that has an enzyme catalyst added?

• 1

• 2

• 3

• 4

Multiple Select

Which statements describe enzymes?

• Enzymes are specific to their substrates

• Enzymes are recycled and used again

• Enzymes are used for energy storage

• Enzymes have nonspecific bonding sites

Draw

Color the enzyme blue, circle the substrate, place a box around the product, use an arrow to point to active site

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

Look at the graph, what began to happen to the enzyme at $$55\degree\ C$$ and higher

• The enzyme was denatured and was no longer worked correctly

• The enzyme was denatured and continued working correctly

• The enzyme was synthesized and increased in function

• The enzyme was synthesized and decreased in function

Multiple Choice

Why does changing the shape of the enzyme alter its ability to function?

• Altering the shape does not alter the function

• The substrate can not fit into the active site

Multiple Choice

Enzymes are _______________ that _____________________ chemical reactions by ____________ the amount of activation energy required to start the reaction.

• carbohydrates, slow down, lowering

• proteins, speed up, increasing

• lipids, speed up, lowering

• proteins, speed up, lowering

Multiple Choice

Which of the following best explains why enzymes are necessary for reactions in our cells?

• The reactions are too slow to meet the needs of the cell if enzymes are missing.

• Enzymes supply the oxygen necessary for the reactions.

• Enzymes change reactants from solid to liquid during the reactions.

• The reactions take up too much space in the cell if enzymes are missing.

Multiple Select

Select all that apply: What causes enzymes to become denatured?

• incorrect pH

• extreme temperatures

• contributors

• inhibitors

Enzymatic Pathways -

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What would happen if?

Multiple Choice

Click the picture to see larger.

A) What could happen to each substrate if enzyme 2 is denatured?

B) What would happen to the end product?

• 1st substrate would build up over time, 2nd substrate and end product would NOT be made

• 2nd substrate would build up over time, 1st substrate and end product would NOT be made

• Both substrates and end product would continue to be made

• Enzyme 3 would make 2nd substrate, and end product would be made