Chemistry of Life

Glucose is an example of a

• monosaccharide

• polysaccharide

• disaccharide

How does carbonic anhydrase change the reaction between carbon dioxide and water?

• 1. It increases the total energy released.

• 1. It alters the structure of the product.

• 1. It decreases the activation energy.

• 1. It decreases the total mass of the system.

Tags

NGSS.HS-PS1-4

What subatomic particles make up the mass of the nucleus?

• electrons and neutrons

• protons and neutrons

• electrons and protons

• protons and nucleic acids

The ____ is positively charged, whereas the ___ is negatively charged.

• 1. neutron, electron

• 1. electron, neutron

• proton, electron

• proton, neutron

Van der Waals forces are what keep geckos able to walk up walls because they have very ____ interactions.

• weak

• strong

• bonded

• giant

Tags

NGSS.HS-PS1-3

A mystery solution had a pH of 4.5 on the pH scale. Which is true?

• 1. There are absolutely no hydrogen ions in that solution, which makes it more basic.

• 1. There are more hydrogen ions in that solution, which makes it more acidic.

• 1. There are more hydroxide ions in that solution, which makes it more acidic.

• 1. There are less hydrogen ions in that solution, which  makes it more neutral.

Organic compounds contain mostly ___, ___, and ____ atoms.

• 1. oxygen, carbon, and hydrogen

• 1. sulfur, phosphorus, and nitrogen

• 1. hydrogen, sulfur, and carbon

• 1. nitrogen, oxygen, and hydrogen

Tags

NGSS.HS-LS1-6

Macromolecules are built from ____ which link together to form ____.

• 1. polymers, monomers

• 1. monomers, polymers

• 1. monomers, macromolecules

• 1. polymers, compounds

The four main types of macromolecules are:

• 1. acids, bases, enzymes, and nucleic acids.

• 1. carbohydrates, lipids, acids, and bases

• 1. nucleic acids, proteins, chemical reactions, and bases

• 1. carbohydrates, lipids, proteins, and nucleic acids.

A disaccharide contains ____ joined by dehydration synthesis. (removal of a water molecule) for example: lactose

• 1. 2 monosaccharides

• 1. 3 polysaccharides

• 1. 3 monosaccharides

• 1. 3 or more sugars