In which organelles can grana and thylakoids be found as structural components?
a. ribosomes
b. mitochondria
c. chloroplasts
d. chromoplasts
Ans: c. chloroplasts
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A ribosome consists of ____
a. two small subunits b. two large subunits c. three subunits of different size d. rRNA and ribosomal proteins e. tRNA and ribosomal proteins
Which of the following are polysaccharides?
A) fructose and deoxyribose B) starch and glycogen C) DNA and RNA D) sucrose and glucose
The technique of vaccination as developed by Jenner was an improvement over variolation because
A) cowpox was common in Europe at the time while smallpox was not. B) cowpox vaccination was not just preventative but could also cure an active case of smallpox. C) the smallpox virus mutates frequently but the cowpox virus does not. D) the cowpox virus used by Jenner was not fatal to humans but provided protection against smallpox. E) Jenner's technique required a lower rate of herd immunity to prevent the spread of smallpox.
Which subatomic particles can vary between isotopes of the same element, without changing the observed chemical properties?
(a) electrons (b) protons and neutrons (c) neutrons (d) neutrons and electrons