Please Help

Need some help please!
Any help would be good I suck in chemistry.

Thanks Mz



Question 2 (Multiple Choice Worth 10 points)

Substances that are messengers in the body and are involved in temperature and blood pressure, pain perception, and mood swing, belong to a class of compounds known as _______________.

steroids

neurotransmitters

analgesics

tetracyclines

Question 3 (Multiple Choice Worth 10 points)

How is "homeopathy" different from true science and real medicine, and thus should be considered with caution?

Homeopathic treatment methods have not been subjected to the same rigorous scientific and FDA standards as most modern medical practices and treatments.

Homeopathy uses minute doses of natural substances that, in a healthy person, would produce symptoms of the same disease as opposed to basing results on a dose-response relationship.

Homeopathic "medications" often contain NONE of the purported active ingredient.

All of these are characteristics of homeopathy that separate this field from science and medicine.

Question 4 (Multiple Choice Worth 10 points)

_______ is the study of the chemistry of living organisms.

matter

geochemistry

biochemistry

political science

Question 5 (Multiple Choice Worth 10 points)

Which of the following is “chiral”

A compound with four different groups attached to a central carbon atom

A compound with five different group attached to a central carbon atom

A compound with three different group attached to a central carbon atom

A compound with two of same atoms attached to a central carbon atom

Question 6 (Multiple Choice Worth 10 points)

Which is not an organic functional group characteristic of carbohydrates ?

–CHO

–OH

–C-C-O-H

–NH2

Question 7 (Multiple Choice Worth 10 points)

Chemically, fats and oils are _________.

esters

ketones

alcohols

amines

Question 8 (Multiple Choice Worth 10 points)

Which of the following is an example of a colloid?

a solution of sodium chloride (i.e. salt water)

cheese

an air mixture containing oxygen, nitrogen, and carbon dioxide

all of these are colloids

Question 9 (Multiple Choice Worth 10 points)

In the age group 25-34 years old, the leading cause of death is ___________.

HIV infection

Accidents

Heart disease

Cancer

Question 10 (Multiple Choice Worth 10 points)

Carbohydrates, proteins, and DNA are all _________.

Inorganic compounds

Polymers

Small molecules

Helical structured molecules

Question 11 (Multiple Choice Worth 10 points)

Enzymes combine with a substrate at active sites and thereby ___________

lower the energy of activation for a reaction

always form an unstable molecule between the enzyme and the substrate

all consumes half of the substrate

supply energy to a reaction