Free EDAIC Basic Sciences Questions and Answers

Question 1

Which of these elements is NOT a constituent of Carbohydrates?

Accepted Answer

Nitrogen

Answer

Carbon

Answer

Hydrogen

Answer

Oxygen

Question 2

Another word that might describe complex carbohydrates is...

Accepted Answer

Polysaccharide

Answer

Monosaccharide

Answer

Disaccharide

Answer

None of the above

Question 3

Carbon is the basis for carbohydrates and all other biologically important molecules. All of the following are reasons why Carbon lends itself to being the basic building block of life on our planet - except for one. Which statement is incorrect?

Accepted Answer

Carbon is a very dense & heavy element, giving living things stability.

Answer

Carbon readily makes four stable bonds in single, double, or triple configurations.

Answer

Carbon is the least electronegative non-metal

Answer

Carbon has a high affinity for Oxygen & Hydrogen, which make bonds easily with C.

Question 4

As a component of Carbohydrates, Oxygen is very important, too. Which of the following statements is incorrect about the way Oxygen behaves as part of a molecule?

Accepted Answer

The presence of oxygen in Carbohydrates makes them highly insoluble in water.

Answer

Oxygen has six outer valence electrons, and makes up to 2 bonds.

Answer

Oxygen is highly electronegative; it is an 'electron hog', sharing them unevenly.

Answer

The uneven sharing of electrons results in Oxygen forming polar covalent bonds.

Question 5

Which of these functional groups are you not going to find in a carbohydrate?

Accepted Answer

Sulfhydryl -SH

Answer

Carbonyl -C=O

Answer

Hydroxyl -OH

Answer

Ether -C-O-C-

Question 6

Which of the following carbohydrates does this structural diagram represent?

Accepted Answer

Answer

Fructose

Answer

Maltose

Answer

Sucrose

Question 7

The sugars glucose, fructose, and galactose all belong to which category of carbohydrates?

Accepted Answer

Monosaccharides

Answer

Disaccharides

Answer

Polysaccharides

Question 8

The sugars lactose, maltose, and sucrose all belong to which category of carbohydrates?

Accepted Answer

Disaccharides

Answer

Monosaccharides

Answer

Polysaccharides

Answer

None of the above

Question 9

Which of the following is NOT a role of Carbohydrates in a cell or organism?

Accepted Answer

Formation of muscle tissues & bone in vertebrate bodies

Answer

Provide energy, either immediate or long-term (storage)

Answer

Provide structure, support, and strength in certain organisms.

Answer

Osmoregulation - moderating fluid balance in living organisms

Question 10

Which of the following is not a monosaccharide?

Accepted Answer

Sucrose

Answer

Glucose

Answer

Fructose

Answer

Galactose