Module 1 Test (2023-2024)

Which is true in a covalent bond?

• 
  The bond forms when electrons are shared.

• The bond forms between ions.

• The bond is caused by van der Waals forces.

• The bond forms when electrons are donated.

Positively charged particles in an atom are called

• protons

• electrons

• neutrons

• positrons

Two atoms of uranium that differ in their number of neutrons are called

• compounds

• electrons

• isotopes

• ions

Which of the following is not a property of water?

• It is cohesive.

• It combusts.

• 
  It is adhesive.

• 
  It is a good solvent.

What is a base?

• 
  

  a substance that quenches chemical reactions

• a substance that decreases pH

• 
  

  a substance that releases hydrogen ions (H⁺) into solution

• a substance that releases hydroxide ions (OH^-) into solution

A _____ is a homogeneous mixture that is formed by dissolving a substance in solvent.

• solution

• solute

• heterogeneous

• homogeneous

Which of the following compounds can be classified as a proteins?

• 
  nucleic acids

• fatty acids

• 
  polysaccharides

• 
  enzymes

Which of the following functions can be attributed to nucleic acids and nucleotides?

• barrier in biological membranes

• 
  chemical signaling between cells

• 
  genetic information storage and transmission

• long-term energy storage

DNA and RNA are nucleic acids polymers that are made up of ______, their monomer building blocks.

• amino acids

• nucleotides

• monosaccharides

• fatty acids

What is the ratio of carbohydrates in a monosaccharide?

• 2 carbon: 1 hydrogen: 2 oxygen

• 1 carbon: 2 hydrogen: 1 oxygen

• 
  1 carbon: 3 hydrogen: 1 oxygen

• 1 carbon: 2 hydrogen: 2 oxygen