How many vacancies does carbon have?
a. two
b. three
c. four
d. five
e. six
c
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The principle of independent assortment states that:
1.One allele is always dominant to another. 2.Hereditary units from the male and female parents are blended in the offspring. 3.The two hereditary units that influence a certain trait segregate during gamete formation. 4.Each hereditary unit on one chromosome is inherited separately from hereditary units on other chromosomes. 5.Genes on the same chromosome travel separately.
Chlorophyll molecules are attached to thylakoid membranes by:
a. a long hydrocarbon tail. b. the porphyrin ring. c. the methyl group. d. a magnesium ion. e. a hydroxide group.
Immunotherapies seek to take advantage of ________ in treating cancers
A) a patient's own immune system B) a patient's own SNPs C) a patient's own cancer cells D) a patient's own genome
Which of the following is normally found at the 5' end of a DNA strand?
A. a phosphate group B. a hydrogen bond C. a hydroxyl group D. histones E. a methyl group