1: Carbohydrates (Quiz)

Question 1 of 22

1

Organic compounds are...

Select one of the following:

Made up of molecules with only carbon and hydrogen
Made up of molecules containing only carbon, hydrogen and oxygen
Made up of molecules with many carbon atoms
Made up of molecules made with very few carbon atoms

Explanation

Question 2 of 22

1

Carbohydrates are inorganic compounds made up of carbon, hydrogen and oxygen

Select one of the following:

True
False

Explanation

Question 3 of 22

3

Monosaccharides have the general formula ❌. Their names are determined by the number of ❌ atoms in the molecule. For example, a ❌ sugar has 3 carbon atoms.

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(CH2O)n

(C2H2O)n

(CHO4)n

carbon

hydrogen

oxygen

triose

hexose

pentose

Explanation

Question 4 of 22

1

All hexose sugars have the formula C6H12O6

Select one of the following:

True
False

Explanation

Question 5 of 22

1

A monosaccharide is

Select one of the following:

An individual sugar molecule
Many sugar molecules
2 sugar molecules

Explanation

Question 6 of 22

2

Label the two isomers of a glucose molecule

Drag an answer into the correct orange point.

Alpha

Gamma

Beta

Sigma

Explanation

Question 7 of 22

4

Tick the boxes that contain the main functions of monosaccharides

Select one or more of the following:

A source of energy in respiration
Building blocks for larger molecules
Intermediates in reactions
Constituents of nucleotides
A product of respiration
A metabolite
storage of carbohydrates

Explanation

Question 8 of 22

1

Disaccharides are composed of two monosaccharide units bonded together by a glycogenic bond

Select one of the following:

True
False

Explanation

Question 9 of 22

1

Is this a condensation or hydrolysis reaction?

Drag the answer into the correct orange point.

condensation

hydrolysis

Explanation

Question 10 of 22

4

Complete the table using the options below

Drag an answer into the correct orange point.

glucose

in germinating seeds

storage in plant roots

glucose + galactose

glucose + maltose

mammalian milk

Explanation

Question 11 of 22

5

Select from the dropdown lists to complete the text.

To test for a reducing sugar:
1. Mix equal volumes of ( Benedict's reagent, iodine solution, universal indicator ) and sample solution
2. Heat to at least ( 70, 40, 60, 110 ) degrees C
3. If a ( reducing, non-reducing, simple ) sugar is present, the solution will turn from ( blue, orange, purple, red ) to a ( red, blue, orange, white ) precipitae

Explanation

Question 12 of 22

1

All monosaccharides are reducing sugars

Select one of the following:

True
False

Explanation

Question 13 of 22

1

The test for a non-reducing sugar is:

Select one of the following:

Add hydrochloric acid to sample and heat. Add benedict's reagent and heat again. Colour change from blue to white precipitate
Add hydrochloric acid to sample and heat. Add benedict's reagent and heat again. Colour change from blue to red precipitate
Add hydrochloric acid to sample and heat. Add alkali. Add benedict's reagent and heat again. Colour change from blue to white precipitate
Add hydrochloric acid to sample and heat. Add alkali. Add benedict's reagent and heat again. Colour change from blue to red precipitate

Explanation

Question 14 of 22

4

You can test for ❌ by adding sucrase enzymes to the sample. These enzymes ❌ sucrose into glucose and ❌. Adding ❌ will show if sucrose is present and the approximate concentration of the solution.

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sucrose

maltose

hydrolyse

condense

glucose

fructose

benedicts reagent

iodine solution

Explanation

Question 15 of 22

1

Polysaccharides are formed from 5 monosaccharides

Select one of the following:

True
False

Explanation

Question 16 of 22

4

Glucose causes a change in water potential in cells. This is avoided by converting glucose to starch for storage. How does this help the plant? (tick the boxes containing the correct answers)

Select one or more of the following:

Starch is insoluble - it has no osmotic effect
Starch cannot diffuse out of the cell
Starch is a compact molecule and can be stored in small spaces
Starch carries a lot of energy in C-C and C-H bonds
Starch is unreactive and therefore won't combine with other molecules

Explanation

Question 17 of 22

8

Select from the dropdown lists to complete the text.

Starch is made of ( alpha, beta )-glucose molecules bonded together in two different ways, forming ( amylose, amylase ) and amylopectin.
-Amylose is linear and ( unbranched, branched ) with 1-( 4, 3, 2, 5, 6 ) glycosidic bonds. It coils to form a ( helix, cyclic molecule, clump )
-Amylopectin has chains of 1-( 4, 6, 3 ) glycosidic bonds. It also has branches which are joined to the 1-4 chain by 1-( 6, 4 ) glycosidic bonds. Amylopectin is a ( branched, linear ) molecule

Explanation

Question 18 of 22

1

You can test for starch by adding iodine solution. The colour change will be orange/brown to blue/purple

Select one of the following:

True
False

Explanation

Question 19 of 22

3

The main storage product in animals is ❌. It has a1-4 and a1-6 glycosidic bonds making it similar to ❌, however it has shorter 1-4 chains making it more ❌.

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glycogen

chitin

starch

cellulose

amylopectin

amylose

branched

linear

Explanation

Question 20 of 22

6

Cellulose is a structural polysaccharide. It is an important component of ❌ in plants. Cellulose is made up of ❌-glucose monomers joined by beta-1-❌-glycosidic bonds. The beta link rotates each monosaccharide by ❌ degrees. ❌ bonds form between the OH groups on adjacent molecules in parallel chains giving strength. When cellulose molcules become cross linked bundles called microfibrils form. Microfibrilis bundle up to form ❌.

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cell walls

cell membranes

beta

alpha

4

6

180

120

90

Hydrogen

glycosidic

fibres

fibrils

Explanation

Question 21 of 22

1

Chitin is a polysaccharide found in the exoskeletons of insects and the cell walls of fungi

Select one of the following:

True
False

Explanation

Question 22 of 22

2

Label this diagram of a chitin molecule

Drag an answer into the correct orange point.

beta 1-4 glycosidic bond

alpha 1-4 glycosidic bond

beta 1-6 glycosidic bond

Acetylamine group

nitrile group

	Created by Joy Pidsley over 7 years ago

Biology (Core Concepts) Quiz on 1: Carbohydrates (Quiz), created by Joy Pidsley on 28/05/2017.

1: Carbohydrates (Quiz)

Question 1 of 22

Organic compounds are...

Select one of the following:

Explanation

Question 2 of 22

Carbohydrates are inorganic compounds made up of carbon, hydrogen and oxygen

Select one of the following:

Explanation

Question 3 of 22

Monosaccharides have the general formula ❌. Their names are determined by the number of ❌ atoms in the molecule. For example, a ❌ sugar has 3 carbon atoms.

Drag and drop to complete the text.

Explanation

Question 4 of 22

All hexose sugars have the formula C6H12O6

Select one of the following:

Explanation

Question 5 of 22

A monosaccharide is

Select one of the following:

Explanation

Question 6 of 22

Label the two isomers of a glucose molecule

Drag an answer into the correct orange point.

Explanation

Question 7 of 22

Tick the boxes that contain the main functions of monosaccharides

Select one or more of the following:

Explanation

Question 8 of 22

Disaccharides are composed of two monosaccharide units bonded together by a glycogenic bond

Select one of the following:

Explanation

Question 9 of 22

Is this a condensation or hydrolysis reaction?

Drag the answer into the correct orange point.

Explanation

Question 10 of 22

Complete the table using the options below

Drag an answer into the correct orange point.

Explanation

Question 11 of 22

Select from the dropdown lists to complete the text.

Explanation

Question 12 of 22

All monosaccharides are reducing sugars

Select one of the following:

Explanation

Question 13 of 22

The test for a non-reducing sugar is:

Select one of the following:

Explanation

Question 14 of 22

You can test for ❌ by adding sucrase enzymes to the sample. These enzymes ❌ sucrose into glucose and ❌. Adding ❌ will show if sucrose is present and the approximate concentration of the solution.

Drag and drop to complete the text.

Explanation

Question 15 of 22

Polysaccharides are formed from 5 monosaccharides

Select one of the following:

Explanation

Question 16 of 22

Glucose causes a change in water potential in cells. This is avoided by converting glucose to starch for storage. How does this help the plant? (tick the boxes containing the correct answers)

Select one or more of the following:

Explanation

Question 17 of 22

Select from the dropdown lists to complete the text.

Explanation

Question 18 of 22

You can test for starch by adding iodine solution. The colour change will be orange/brown to blue/purple

Select one of the following:

Explanation

Question 19 of 22

The main storage product in animals is ❌. It has a1-4 and a1-6 glycosidic bonds making it similar to ❌, however it has shorter 1-4 chains making it more ❌.

Drag and drop to complete the text.

Explanation

Question 20 of 22

Drag and drop to complete the text.

Explanation

Question 21 of 22