Select the correct path a protein synthesized on a ribosome attached to the rough ER would follow in
the endomembrane system.
a. rough ER ? smooth ER ? Golgi complex ? plasma membrane
b. rough ER ? Golgi complex ? vesicle ? plasma membrane
c. rough ER ? vesicle ? lysosome ? plasma membrane
d. rough ER ? vesicle ? smooth ER ? plasma membrane
e. rough ER ? smooth ER ? lysosome ? plasma membrane
B
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Very low concentrations of detergent make membranes leaky to small molecules and ions without damaging proteins. In isolated mitochondria exposed to detergent, the molecules of the electron transport chain and of ATP synthase remain intact
Do you expect ATP synthesis to continue in the presence of low concentrations of detergent? A. Yes, because all enzymes and electron carriers are functional. B. No, because with a leaky membrane, H+ gradient cannot be maintained. C. No, because leaky membranes do not allow NADH and FADH2 to donate their electrons to the electron transport chain. D. because leaky membranes inhibit glycolysis.
Answer the following statements true (T) or false (F)
1. Modern humans show a type I survivorship curve. 2. K-selected populations tend to reproduce quickly. 3. Exponential growth is rare because resources are usually limiting. 4. r-selected species tend to have type III survivorship curves. 5. Drought and floods are considered to be density-dependent factors potentially affecting population size.
You may have noticed that many of the cells involved in immunity have more than one function. The T lymphocytes are no exception. Along with killing viruses and bacteria, they also attack eukaryotic cells such as tumor cells or
a. viruses b. prokaryotic invaders. c. eukaryotic parasites. d. worms such as hookworms. e. prions.
Answer the following statements true (T) or false (F)
1.Vegetative edible plant parts include roots, fruits, stems, and tubers. 2.If a plant exhibits a pattern of indeterminate growth, it stops growing when it reaches mature size. 3.Herbaceous plants are those that contain little or no woody tissue. 4.The three main types of tissue formed by plant cells are ground tissue, dermal tissue, and vascular tissue. 5.The epidermis of a plant leaf is usually many layers thick and carries out most of the photosynthesis in a leaf.