Module 6: Chemistry in Biology

Which describes the particle or particles that are in the nucleus of an atom ?

• electron and neutron

• neutron and proton

• proton and electron

• neutron and electron

Tags

NGSS.HS-PS1-8

Which process changes a chlorine atom into a chloride ion (Cl^-)?

• electron gain

• electron loss

• proton gain

• proton loss

How do the isotopes differ from normal neutral atoms?

• in the number of protons

• in the number of electrons

• in the number of neutrons

Which of these is a pure substance that cannot be broken down by a chemical reaction?

• a compound

• a molecule

• a mixture

• an element

Which of the following is a substance that lowers the activation energy?

• an ion

• a catalyst

• a reactant

• a substrate

Which statement is true of chemical equations?

• reactants are on the right

• products have fewer atoms than the reactants

• Reactants yield products. The arrow presents the products.

• Reactants have fewer atoms than products.

Tags

NGSS.HS-PS1-7

Which describes an exothermic reaction?

• they release energy

• they require energy

• they create energy

• they destroy energy

Tags

NGSS.HS-PS1-4

In which of the following are bonds broken and new bonds formed?

• chemical reactions

• physical changes

• elements

• isotopes

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NGSS.HS-PS1-4

NGSS.HS-PS1-2

NGSS.HS-PS1-6

An enzyme is a biologic catalyst

• true

• false

The following graph represent an ____ reaction.

• endothermic

• exothermic

• catalyst reacton

• extrathermic

Tags

NGSS.HS-PS1-4