What increases the rate of metabolism in cells throughout the body?
Options:
- (A) Thyroxine
- (B) Smoking
- (C) fever
- (D) bioaerosols
- (E) acetic acid
- (F) sweating
- (G) Power plants
- (H) heat produced
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Let's think first: Thyroid hormones increase the rate of metabolism in cells throughout the body. Thyroxine, a thyroid hormone, is an aryl iodide. Thyroxine increase the rate of metabolism in cells throughout the body.... So the answer is [(A)]

Viruses first infect, then they release into the host by doing what?
Options:
- (A) Cooking
- (B) kill them
- (C) harm them
- (D) lysing
- (E) illness
- (F) fever
- (G) migrate
- (H) propagate
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Let's think first: Viruses infect and live inside the cells of living organisms. If the virus is nonenveloped it is released by lysing the host cell. Infection by viruses leads to lysing and release.... So the answer is [(D)]

Cells with damaged dna are more likely to divide when exposed to what?
Options:
- (A) harmful substances
- (B) apoptotic genes
- (C) sulfur dioxide
- (D) a tumor suppressor
- (E) Electrical energy
- (F) heat or cold
- (G) immune system
- (H) a carcinogen
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Let's think first: Oncogenes promote the division of cells with damaged DNA. Carcinogenic or oncogenic effects cause cancer. Carcnogenic substances can promote division of cells with damaged DNA.... So the answer is [(H)]

What is it called when one solvent combines with another, what forms?
Options:
- (A) chemical pair
- (B) permineralization
- (C) chemical bonds
- (D) a solute
- (E) chemical duo
- (F) substance bonds
- (G) Condensation
- (H) kinetic energy
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Let's think first: Chemical bonds form when substances react with one another. Solvents are substances, usually liquid, that dissolve other substances. When one solvent reacts with another, chemical bonds form.... So the answer is [(C)]

In what way does a catalyst help in chemical reactions?
Options:
- (A) Generating heat
- (B) lowered energy cost
- (C) metabolic reaction
- (D) heating liquids
- (E) by making heat
- (F) adding heat
- (G) increases a body's strength
- (H) preventing heat transfer
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Let's think first: All chemical reactions require activation energy to get started. Catalysts lower the activation energy. A catalyst can lower the energy cost of a chemical reaction.... So the answer is [(B)]

When gametes fuse, the resultant zygote is:
Options:
- (A) fertile
- (B) diploid
- (C) Flowers
- (D) grow
- (E) infected
- (F) It expands
- (G) pollen
- (H) seeds
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Let's think first: Fertilization occurs when a sperm and an egg fuse to form a diploid zygote. Familiar types of gamete include the female ovum , or egg cell, and the male sperm cell. Fertilization occurs when the male and female gametes fuse to form a diploid zygote.... So the answer is [(B)]