25S1 W3 Enzymes and Macromolecules

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Biology

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11th Grade

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Aleisha Bliesner

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55 Slides • 23 Questions

Multiple Choice

What is the monomer that makes up carbohydrates?

Monosaccarides

Fatty Acids

Amino Acids

Nucleotides

Multiple Choice

What are triglycerides made of?

Monosaccarides

Fatty Acids

Amino Acids

Nucleotides

Multiple Choice

What is the monomer that makes up proteins?

Monosaccarides

Fatty Acids

Amino Acids

Nucleotides

Multiple Choice

Amino acids all have the same general structure except for the:

Amino Group

Carboxyl Group

'R' Group

Carbonyl Group

Multiple Choice

Which protein structure describes the sequence of amino acids?

Primary structure

Secondary structure

Tertiary structure

Quaternary structure

Multiple Choice

Which of the following describes the secondary structure of proteins?

The sequence of amino acids

The α-helix and β-pleated sheet folding

The folding of the polypeptide chain due to the 'R' groups

The joining of different protein molecules to make one big molecule

Multiple Choice

Which protein structure describes a protein's three-dimensional shape?

Primary structure

Secondary structure

Tertiary structure

Quaternary structure

Multiple Choice

Haemoglobin is a quaternary protein because:

It has more than one peptide bonds

Its shape is globular

It consists of more than one polypeptide chains

It has iron in each heme group

Multiple Choice

What is the monomer that make up nucleic acids?

Monosaccarides

Fatty Acids

Amino Acids

Nucleotides

Multiple Choice

Cellulose, starch and glycogen are examples of:

monosaccharides

disaccharides

lipids

polysaccharides

Multiple Choice

What does organic mean (in chemistry)?

It costs more at the grocery store

It contains carbon and hydrogen

It is made of many individual parts

It produces energy

Multiple Choice

What is the following molecule?

triglyceride

phospholipid

steroid

protein

Multiple Choice

What is the following molecule?

alpha glcuose

beta glucose

amino acid

disaccharide

Fill in the Blanks

Multiple Choice

What is the name of the special region of an enzyme that binds to the substrate?

Active area

Unique site

Complementary region

Active site

Multiple Choice

Any substance that is acted upon by an enzyme is called a:

Coenzyme

Substrate

Vitamin

Polypeptide

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

At first, scientists thought that in order for an enzyme to catalyse a reaction, the substrate had to fit perfectly into the active site.

What was the name for this model of enzyme action?

The original model

The lock and key model

The induced fit model

The induced key model

Multiple Choice

We now know that in order for an enzyme to catalyse a reaction, the enzymes active site actually changes shape slightly as it binds to the substrate.

What do we call this model of enzyme action?

The new model

The lock and key model

The induced fit model

The induced key model

Multiple Choice

Pancreatic amylase is a digestive enzyme found in the small intestine. It helps break down large starch molecules later in the digestive process. Pancreatic amylase is unable to break down proteins.

Which of the following best explains why pancreatic amylase is able to break down starches, but not proteins?

Enzymes are specific to their substrates

Proteins are too large to be affected by enzymes

Enzymes and proteins cannot break down other proteins

Proteins are able to easily denture enzymes

Multiple Choice

An enzyme speeds up a reaction by:

lowering the activation energy

raising the activation energy

releasing energy

absorbing energy

Multiple Choice

What effect does high temperature have on enzymes?

Denatures them

Inactivates them

Destroys them

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 .

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