Which of the following statements about hydrocarbons is false?
A) Hydrocarbons are inorganic compounds.
B) Hydrocarbons contain only carbon and hydrogen atoms.
C) Hydrocarbons consist of atoms linked by single or double bonds.
D) Hydrocarbons can form straight, branched, or ringed structures.
Answer: A
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The functional unit of the kidney is the
(a) renal pelvis. (b) ureter. (c) cortex. (d) nephron.
Genetic testing for complex traits ____
a. does not supply enough information to make it useful b. reveals the phenotype of the organism c. reveals the effects of the environment on the genome d. reveals how many genes are involved in producing the trait e. cannot exactly define risks
The nucleus of an atom is composed of two subatomic particles, ________ and ________.
A. protons; electrons B. neutrons; electrons C. protons; neutrons
Xeroderma pigmentosum (XP) is a rare autosomal recessive disorder. Patients with XP exhibit a cellular hypersensitivity to ultraviolet (UV) radiation, a high incidence of skin cancer and premature aging. Based on these clinical characteristics, what is the most likely cause for this disease?
A. lack of telomerase activity B. defects in DNA replication C. defects in DNA repair D. shortened telomeres