What are opsins and what are they a part of?
a. membrane lipids that form a complex with a retinal molecule at the centre
b. membrane proteins that form a complex with a retinal molecule at the centre
c. retinal molecules that form a complex with membrane proteins at the centre
d. retinal molecules that form a complex with membrane lipids at the centre
Ans: b. membrane proteins that form a complex with a retinal molecule at the centre
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In a lichen, the photobiont usually receives
a. nutrients. b. protection from herbivory. c. aid in sexual reproduction. d. enhanced dispersal of offspring. e. shelter from radiation and desiccation.
Which of the following are rod-shaped bacteria?
a. vibrio b. bacilli c. diplococci d. spirochete e. streptococci
Why is it necessary for DNA to duplicate before cells divide
In the figure above, representing transcription, the item labeled "A" is
a. reverse transcriptase. b. primase. c. the spliceosome. d. RNA polymerase. e. DNA helicase.