Which of the following is NOT true about mitochondria and chloroplast proteins? A. Proteins of both organelles are unfolded as they are transported. B. The proteins have N-terminal signal peptides C. The proteins need a proteins translocator D. The proteins remain unfolded once they cross the membranes E. Most of the proteins are encoded by nuclear genome

Draw a pair of antiparallel microtubules across the page. The following should be clarified or added: a. plus and minus ends clearly denoted on both microtubules b. the fact that each microtubule is a polymer of alpha+beta heterodimers must be denoted (with correct orientation) c. one microtubule is bound by a simple representation of plus-end directed motor protein. The motor protein should be named and representation indicates which direction it moves. d. one microtubule is bound by a simple representation of minus-end directed motor protein. The motor protein should be named and representation indicates which direction it moves.

What would you expect to see in a cell that contains a large pool of free GTP-tubulin dimers? microtubules would grow longer microtubules would shrink microtubules would contain GTP caps O A & C O B& C

1) Which of the following contains all of the information required to target a precursor protein from the cytosol to the mitochondrial matrix? a. N-terminal uptake-targeting sequence b. C-terminal uptake-targeting sequence c. post-translational organelle d. translocon e. None of the above 2) In the absence of targeting information, what is the default location of proteins synthesized on cytosolic ribosomes? a. Golgi apparatus b. ER lumun c. Cytosol d. Cell plasma membrane e. ER membrane

Where in the cell is an N-linked glycan added onto a protein? A.In the nucleus. B.In the cytoplasm.C.The the lumen of the ER.D.In the lumen of the cis-Golgi.E.On the extracellular side of the plasma membrane.

: Yeast cells adapt to cold environments by and the length of the phospholipid tails the number of saturated fatty acid tails in the plasma membrane. Increasing....... Decreasing b. Decreasing....... Increasing C. Decreasing ....... Decreasing d. Increasing ....... Increasing Bacterial cells adapt to high temperatures by the length and the amount of saturated fatty acid tails in the plasma membrane. Increasing ...... Decreasing b. Decreasing....... Increasing C. Decreasing....... Decreasing d. Increasing....... Increasing

Which of the following proteins would you expect to be translated by a ribosome associated with the rough endoplasmic reticulum?   A. A potassium channel that localizes to the plasma membrane   B. Pyruvate kinase (a protein involved in glycolysis)   C. A component of RNA polymerase II (a.k.a. RNA Polymerase 2)   D. A component of DNA polymerase

Apoptosis of a human cell can occur when a set of cellular events happens, including: (select all that apply!) a. destroying the 70S ribosomes. ☐ b. chopping up the chromosomes. c. disintegrating the cytoskeleton. ☐ d. shattering the nucleus.

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How would this protein be arranged in the ER membrane? Red is signal sequence/start. Yellow is stop transfer. Blue is protein sequence N-term Select one or more: a. N-term cytosol b. N-term ER C. C-term cytosol d. C-term ER C-term