What structure do all cells have in common?
What will be an ideal response?
plasma membrane
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A new experimental pesticide is being tested by a large agricultural chemical company. An unfortunate side effect in plants treated with this new product is a decrease in ATP production in the chloroplasts
(Interestingly, production of ATP in the mitochondria is unaffected.) Given this observation, which of the following would you expect to be DIRECTLY affected by the new pesticide? A. the synthesis of triose phosphates from 3- phosphoglycerate B. the transport of electrons along the photosynthetic electron transport chain C. the carboxylation of RuBP by rubisco D. the oxidation of RuBP by rubisco
What is the structure labeled B in the accompanying figure?
a. cytoplasm b. nucleoid c. plasma membrane d. capsule e. pilus
In the northeastern Pacific ocean, sea otters occur at a relatively low abundance. By preying upon sea urchins, sea otters maintain underwater kelp (large algae) "forests", which would otherwise be decimated by the herbivorous sea urchins. The kelp forests supply food for a wide variety of marine organisms, as well as providing refuge from predation and nursery habitat for juveniles. Based on this, what type of species best describes sea otters?
A. umbrella species B. dominant species C. flagship species D. indicator species E. keystone species
The amino acid sequences below represent the sequences of transmembrane helices. The characteristics of ? helices that form a channel are different from those that form a single transmembrane domain
Select the helix that forms a single transmembrane domain. (a) VGHSLSIFTLVISLGIFVFF (b) IMIVLVMLLNIGLAILFVHF (c) ILHFFHQYMMACNYFWMLCE (d) VTLHKNMFLTYILNSMIIII