Unit 10 Chem

_____________ is the branch of chemistry that deals with organic compounds, reactions, and other processes that occur within living organisms.

• Organic Chemistry

• Inorganic Chemistry

• Physical Chemistry

• Biochemistry

Which statement(s) about cholesterol is(are) NOT true? Select all that apply.

• Excess cholesterol can cause arterial plaque to build up in your arteries and lead to atherosclerosis.

• Cholesterol works together with your heart and when arteries get it, they produce proteins that build muscles, fortifying the heart.

• When molecules of cholesterol mix with the water in your body, carbon dioxide is produced and you can exhale.

• It is a building block for many of the hormones your body produces.

• It is a major component of cell membranes and forms the protective membrane around your nerves.

Which is not formed by proteins?

• hormones

• globules

• enzymes

• steroids

To nuclear scientists, protons and neutrons are referred to collectively as __________.

• particles

• nuclei

• nuclides

• nucleons

A carbohydrate that consists of a simple sugar and is a basic building block for other carbohydrates is a _________________.

• disaccharide

• polysaccharide

• triplesaccharide

• monosaccharide

The term ___________ refers to the conversion of a neutron to a proton or a proton to a neutron with the emission of a beta particle.

• alpha particle

• beta particle

• beta decay

• positive particle

Where is the water cooled in a nuclear reactor and circulated back to the heat exchanger?

• chain reaction

• condenser

• radiation

• generator

A polypeptide of 50 or more amino acids and an essential part of every living cell is called a(n) ____________.

• dipeptide

• polypeptide

• protein

• peptide

A complex organic molecule called a _______________ consists of a ball of phospholipids and proteins that transports triglycerides and cholesterol through the bloodstream.

• lipoprotein

• steroid

• phospholipid

• wax

What part of the nuclear reactor absorbs neutrons to control the rate of reaction?

• generator

• radiation

• control rods

• condenser