Biology Molecules Random Retrieval

This quiz contains all the questions in the Biology Molecules section. The website will pick 20 questions at random.

1 / 20

Which of the following molecules contain a phosphate group?

Amino Acids, Nucleotides and ATP

Amino Acids and ATP

Nucleotides and ATP

2 / 20

Which bond is broken when ATP is used?

Between A and A

Between A and B

Between B and C

3 / 20

What type of reaction is involved in the breakdown of ATP?

Condensation

Hydrolysis

4 / 20

By which method does DNA replicate?

Conservative

Semi-Conservative

Dispersive

5 / 20

What type of bonds are broken between the DNA bases when replication starts?

Hydrogen

Phosphodiester

Peptide

6 / 20

Methanol is toxic. It binds to the enzyme alcohol dehydrogenase . Ethanol is similar in structure to methanol. One treatment for Methanol poisoning is to drink a lot of ethanol. What type of inhibitor is methanol?

Competitive

Non-competitive

7 / 20

Describe what the line would look like when a non-competitive inhibitor was added to the reaction.

The line would increase less steeply, but it would eventually plateau at the same rate as withut an inhibitor.

The line would be less steep at the start, and would plateau at a rate below the line without an inhibitor.

The line would go up at the same gradient at the start, but would then plateau at a lower rate.

8 / 20

Will line A ever plateau if the substrate is unlimited?

Yes

No

9 / 20

Which points on the above graph show when the enzyme is denatured?

pH4.5

pH 10.5

pH4.5 & pH10.5

10 / 20

The optimum temperature for this enzyme is actually 40^oC. Describe what the line would look like on the above graph.

It would rise at the same rate as 25oC, but the extend beyond, and plateau above it.

It would rise steeper than 25oC at the start , but then plateau above it.

It would rise steeper than 25oC at the start , but then plateau at the same mass.

11 / 20

Enzymes speed up chemical reactions by doing what?

Increasing activation energy

Increasing collisions

Reducing Activation Energy

12 / 20

The sample needs to be treated before adding the regent. How does it need to be treated?

Add a few drops of NaOH to make it alkaline.

Heated in a boiling water bath for 5 minutes.

Add a few drops of HCl to make it acidic.

13 / 20

What is the name of the biochemical test for proteins?

Biuret

Benedicts

Sudan III

14 / 20

What level of protein structure contains alpha helices and beta pleated sheets?

Secondary

Tertiary

Quaternary

15 / 20

Which of the above three molecules shows a correct bond between glycerol and a fatty acid?

A

B

C

16 / 20

What elements are lipids made out of?

Carbon and Hydrogen

Carbon, Hydrogen and Oxygen

Carbon, Hydrogen , Oxygen and Nitrogen.

17 / 20

What type of glycosidic bond form the main body for the branches?

1-4 Glycosidic Bond

1-6 Glycosidic Bond

1-2 Glycosidic Bond

18 / 20

Which polysaccharide do animal cells use as storage?

Starch

Fat

Glycogen

19 / 20

Which two types of polysaccharide form starch?

Amylose and Cellulose

Amylose and Amylopectin

Amylopectin and Cellulose

20 / 20

What type of bond forms amylose?

1-6 Glycosidic bond

1-4 glycosidic bond

1-6 and 1-4 glycosidic bond

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