Below are four statements describing protein translocation into the ER. Decide whether each statement is true or false, and explain why. A. The signal peptide binds to a hydrophobic site on the ribosome causing a pause in protein synthesis, which resumes when SRP binds to the signal peptide. B. Nascent polypeptide chains are transferred across the ER membrane through a pore in the protein translocator complex. C. In multipass transmembrane proteins, the odd-numbered transmembrane segments (counting from the N-terminus) act as start-transfer signals, while the even-numbered segments act as stop-transfer signals. D. The ER lumen contains a mixture of thiol-containing reducing agents that prevent the formation of S-S linkages (disulfide bonds) by maintaining the cysteine side chains of luminal proteins in reduces (-SH) form.

videntify the dna change shown in the diagram and explain how that change can result in the increased genetic diversity often seen among siblings.identify the dna change shown in the diagram and explain how that change can result in the increased genetic diversity often seen among siblings.

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.

the atmospheric gas that forms a mild acid when dissolved in water is called carbon dioxide. the correct answer is a. 2.) chemical weathering would cause an inscription on a marble headstone to become harder and harder to read over time.