Proteins and Enzymes

Question 1 of 15

2

❌ is the order (sequence) of the amino acids forming a protein chain. The amino acids are held together by ❌ and the chain is called a ❌.

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Primary Structure

peptide bonds

polypeptide

Explanation

Question 2 of 15

2

Secondary Structure refers to when the protein chain changes into a coil (called ❌), pleat (called ❌), or a ❌. These are formed by a ❌.

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alpha helix

beta sheet

random coil

hydrogen bond

Explanation

Question 3 of 15

1

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Tertiary Structure is formed when there is an interaction between the of the amino acids within a single polypeptide chain.

Explanation

Question 4 of 15

2

The R-groups can form ❌ types of bonds.
❌ -> Hydrophobic Interaction
❌ -> Hydrogen
❌ -> Ionic Bond
❌ -> Disulfide Bridge
Exceptions
1. The amino acid cysteine is polar. However, it forms a disulfide bridge instead of a hydrogen bond. This is because it has a sulfur molecule.
2. Methionine also contains sulfur and is non-polar. It forms a hydrophobic interaction instead of a disulfide bridge.

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4

3

Non-polar

Polar

Acidic/Basic

Cysteine

Explanation

Question 5 of 15

2

Polar amino acids usually have an N, F, or ❌ in their R-groups. ❌ is an exception. It is polar; however, it doesn't follow the common criteria. Another exception is ❌. It has an N in its R-group, but it is non-polar as it has an equal pull on each side.

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O

P

K

Cysteine

Tryptophan

Explanation

Question 6 of 15

1

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Non-polar amino acids have Cs and s in their R-groups.

Explanation

Question 7 of 15

2

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To tell whether an amino acid will form an bond, the amino acid must be an acid or a base. An acid has a in its R-group, whereas a base has a . It is important to know that all acids and bases are .

Explanation

Question 8 of 15

1

Which bond will the following amino acid form?

Select one of the following:

Hydrogen Bond
Hydrophobic Interaction
Disulfide Bridge
Ionic Bond

Explanation

Question 9 of 15

1

Which bond will the following amino acid form?

Select one of the following:

Hydrogen Bond
Hydrophobic Interaction
Disulfide Bridge
Ionic Bond

Explanation

Question 10 of 15

1

Which bond will the following amino acid form?

Select one of the following:

Ionic Bond
Disulfide Bridge
Hydrogen Bond
Hydrophobic Interaction

Explanation

Question 11 of 15

1

Which bond will the following amino acid form?

Select one of the following:

Hydrogen Bond
Disulfide Interaction
Hydrophobic Interaction
Ionic Bond

Explanation

Question 12 of 15

2

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Some proteins stop after the structure. Some go on to the structure. In this structure, 2 or more chains interact and for 3 dimensional structure.

Explanation

Question 13 of 15

1

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Due to changes in pH levels, temperature, and other factors, proteins can often . This means that the bonds between the proteins break and the protein unravels. Some proteins are able to recover, others are not.

Explanation

Question 14 of 15

2

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Enzymes are a type of ( protein, lipid, monosaccharide, carbohydrate, amino acid ). They help catalyze reactions. So, they help to ( speed up, slow down ) chemical reactions in the body. A ( substrate, active site, product ) is the reactant that the enzyme acts on. The ( active site, substrate, product ) is the region on an enzyme where the substrate fits.

Explanation

Question 15 of 15

1

Which of these is an enzyme?

Select one or more of the following:

Topoisomerase
Helicase
Glucose
Lactose
Lactase
Matose
Maltase
Polymerase

	Created by Urvee ___ over 7 years ago

A quiz on proteins and enzymes

Proteins and Enzymes

Question 1 of 15

❌ is the order (sequence) of the amino acids forming a protein chain. The amino acids are held together by ❌ and the chain is called a ❌.

Drag and drop to complete the text.

Explanation

Question 2 of 15

Secondary Structure refers to when the protein chain changes into a coil (called ❌), pleat (called ❌), or a ❌. These are formed by a ❌.

Drag and drop to complete the text.

Explanation

Question 3 of 15

Fill the blank space to complete the text.

Tertiary Structure is formed when there is an interaction between the of the amino acids within a single polypeptide chain.

Explanation

Question 4 of 15

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Explanation

Question 5 of 15

Polar amino acids usually have an N, F, or ❌ in their R-groups. ❌ is an exception. It is polar; however, it doesn't follow the common criteria. Another exception is ❌. It has an N in its R-group, but it is non-polar as it has an equal pull on each side.

Drag and drop to complete the text.

Explanation

Question 6 of 15

Fill the blank space to complete the text.

Non-polar amino acids have Cs and s in their R-groups.

Explanation

Question 7 of 15

Fill the blank spaces to complete the text.

To tell whether an amino acid will form an bond, the amino acid must be an acid or a base. An acid has a in its R-group, whereas a base has a . It is important to know that all acids and bases are .

Explanation

Question 8 of 15

Which bond will the following amino acid form?

Select one of the following:

Explanation

Question 9 of 15

Which bond will the following amino acid form?

Select one of the following:

Explanation

Question 10 of 15

Which bond will the following amino acid form?

Select one of the following:

Explanation

Question 11 of 15

Which bond will the following amino acid form?

Select one of the following:

Explanation

Question 12 of 15

Fill the blank spaces to complete the text.

Some proteins stop after the structure. Some go on to the structure. In this structure, 2 or more chains interact and for 3 dimensional structure.

Explanation

Question 13 of 15

Fill the blank space to complete the text.

Due to changes in pH levels, temperature, and other factors, proteins can often . This means that the bonds between the proteins break and the protein unravels. Some proteins are able to recover, others are not.

Explanation

Question 14 of 15

Select from the dropdown lists to complete the text.

Explanation

Question 15 of 15

Which of these is an enzyme?

Select one or more of the following:

Explanation