CMLA Chemistry Basics 5

Question 1

Which of the following monosaccharides is known as blood sugar and is the primary fuel for cellular respiration?

Accepted Answer

Glucose

Answer

Glucose is the principal monosaccharide used by cells for energy production through glycolysis and the citric acid cycle.

Question 2

A laboratory solution that has more hydroxide ions (OH⁻) than hydrogen ions (H⁺) is classified as:

Accepted Answer

Basic (alkaline)

Answer

A basic or alkaline solution has a higher concentration of OH⁻ than H⁺, resulting in a pH greater than 7.

Question 3

What type of isomers have the same molecular formula and connectivity but differ in the spatial arrangement of atoms?

Accepted Answer

Stereoisomers

Answer

Stereoisomers share the same molecular formula and bond connectivity but differ in the three-dimensional orientation of their atoms.

Question 4

In laboratory practice, 'pipetting to the mark' ensures:

Accepted Answer

An accurate, reproducible volume of liquid is delivered

Answer

Filling a volumetric pipette to the calibration mark ensures delivery of the precise volume for which the pipette is rated.

Question 5

Which of the following statements correctly describes osmosis?

Accepted Answer

Movement of water from high to low solute concentration across a semipermeable membrane

Answer

Osmosis is the passive movement of water molecules across a semipermeable membrane from an area of lower solute concentration to higher solute concentration.

(CMLA) Certified Medical Laboratory Assistant Practice Test

(CMLA) Certified Medical Laboratory Assistant Practice Test

CMLA Chemistry Basics 5