Chemical Basis of Life

Presentation

•

Biology

•

9th Grade

•

Hard

Joseph Anderson

FREE Resource

17 Slides • 26 Questions

Multiple Choice

Which has a positive charge?

neutron

electron

tron

proton

Multiple Choice

Which has a neutral charge?

proton

electron

neutron

tron

Multiple Choice

Which has a negative charge?

proton

electron

isotope

neutron

Multiple Choice

Matter composed of one type of atom:

isotope

ion

element

mixture

Multiple Choice

What is the smallest unit of matter?

Orbital

Cloud

valence

Atom

Multiple Choice

What is made of atoms of different elements bonded together?

Elements

Compounds

Mixtures

Quarks

Multiple Choice

What is the smallest amount of energy needed for reactants to form products called?

Kinetic Energy

Activation Energy

Potential Energy

Thermal Energy

Multiple Choice

Which type of reaction absorbs heat and causes a cooling effect?

Exothermic

Endothermic

Combustion

Neutralization

Multiple Choice

In an endothermic reaction, the energy of the products is ______ than the energy of the reactants.

lower

higher

equal

none of the above

Multiple Choice

Which of the following is an example of an exothermic reaction?

Melting ice

Lighting a candle

Evaporating water

Photosynthesis

Multiple Choice

An exothermic reaction releases heat and causes a ______ effect.

cooling

warming

neutral

none of the above

Multiple Choice

Enzymes are an example of

Lipids

Carbohydrate

Protein

Nucleic Acid

Multiple Choice

What is the purpose of an enzyme?

give permission for the reaction

raise activation energy

speed up reactions

control how many reactions occur

Multiple Choice

Each enzyme only has 1 substrate that will fit its active site. What is this called?

reusable

catalyst

specific

fragile

Multiple Choice

Any substance that is acted upon by an enzyme is called a(n)?

Coenzyme

Substrate

Vitamin

Polypeptide

Multiple Choice

Letter D...

active site

enzyme

substrate

products

Multiple Choice

Letter B...

active site

enzyme

substrate

products

Multiple Choice

Letter C...

active site

enzymes

substrate

products

Multiple Choice

Letter E...

active site

enzyme

substrate

products

Multiple Choice

Enzymes provide a site where reactants called substrates can be brought together in an enzyme-catalyzed reaction. The site is called the

enzyme substrate complex.

reaction site.

active site.

lock and key.

Multiple Choice

An enzyme speeds up a reaction by

lowering the activation energy.

raising the activation energy.

releasing energy.

absorbing energy.

Multiple Choice

Based on the graph, what is the optimal temperature for this enzyme?

15^oC

40^oC

30^oC

35^oC

Multiple Choice

What makes an enzyme substrate specific?

Size

Shape

Name

Location it is found in

Multiple Choice

At high temperatures enzyme activity declines because of:

Denaturation

Decreased Kinetic Motion

Increased H-Bonding

Dissociation of Ionic Compounds

Multiple Choice

Enzymes are composed of which of the following monomers?

amino acids

carbohydrates

nucleotides

monosaccharides

Multiple Choice

What is a Cataylst?

A substance that speeds up a rate of chemical reaction.

Molecules that make enzymes work harder and faster

reaction of an enzyme

A substance that slows down a rate of chemical reaction.

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