QUESTION 6 What does Bip do in the cell? - Provide energy for translocation of proteins into the ER - Form COPII transport vesicles - Translate proteins - Detect unfolded protein QUESTION 7 What does Sar1 do? - Drives the fusion of vesicle and target membranes - Initiates the assembly of COPI onto the ER membrane - Ensures that vesicles arrive at their correct location - Initiates the assembly of COPII onto the ER membrane QUESTION 8 Which of the following is responsible for transferring iron into the cell? - Transferrin receptor - LDL receptor - ESCRT - Mannose-6-Phosphate receptor QUESTION 9 Which of the following is NOT a true statement about endosymbiosis? - Chloroplasts have the same number of genes as the free cyanobacteria they derived from - Mitochondria have two phospholipid bilayers around them - Bacteria have been endocytosed and become endosymbionts AFTER the endosymbiosis event that generated the mitochondria and chloroplast - Genes from the bacteria that became the mitochondria can be found in the nucleus of human cells QUESTION 10 Which of the following do not have DNA inside of them? - Mitochondria - Chloroplast - Nucleus - Endoplasmic Reticulum
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Select all correct answers. Mitochondria A. contain DNA. B. contain ribosomes and synthesize proteins. C. are surrounded by a single phospholipid bilayer. D. divide by binary fission. QUESTION 2 According to the endosymbiosis theory, the ancestor of the mitochondria currently found in eukaryotes was A. a protist B. a fungus C. a cyanobacterium D. an α-proteobacterium QUESTION 3 The evolution of the nuclear envelope made it possible for cells to A. separate transcription and translation B. reproduce sexually instead of asexually C. exchange DNA with other organisms by horizontal gene transfer D. all of these QUESTION 4 The first eukaryotic cells were likely able to move using A. pseudopodia B. a flagellum C. cilia D. mitochondria QUESTION 5 Select all correct answers. Which of the following morphological features are found in ALL eukaryotes? A. A cell wall B. A cytoskeleton C. A nucleus and endomembrane system D. Mitochondria or genes normally found in mitochondria E. Multicellularity F. Chloroplasts or genes normally found in chloroplasts QUESTION 6 Select all correct answers. Circular chromosomes are found in A. the nucleus of eukaryotic cells B. mitochondria C. prokaryotic cells D. chloroplasts QUESTION 7 Select all correct answers. Circular chromosomes are found in A. mitochondria B. prokaryotic cells C. the nucleus of eukaryotic cells D. chloroplasts
Alexander B.
QUESTION 9 This organelle is the most prominent in a typical eukaryotic cell and contains the genetic information of the cell. A. Nucleus B. Lysosome C. Endoplasmic reticulum D. Mitochondria E. Chromosome QUESTION 10 Amino acids linked together fold into shapes that are most chemically stable, so the proteins they make up have particular shapes. Why does this matter? A. It actually doesn't matter because DNA will set up the proteins correctly regardless of the amino acids. B. If the proteins aren't the right shape, DNA can't translate them. C. If the proteins aren't the right shape, they can't do their job properly. D. It actually doesn't matter because the body can fix its own proteins, so they can do their job. E. If the proteins aren't the right shape, they don't fit down blood vessels.
Adi S.
$7-8 \quad$ The nucleus of a eukaryotic cell is much larger than a bacterium, and it contains much more DNA. As a consequence, a transcription regulator in a eukaryotic cell must be able to select its specific binding site from among many more unrelated sequences than does a transcription regulator in a bacterium. Does this present any special problems for eukaryotic gene regulation? Consider the following situation. Assume that the eukaryotic nucleus and the bacterial cell each have a $\sin -$ gle copy of the same DNA binding site. In addition, assume that the nucleus is 500 times the volume of the bacterium, and has 500 times as much DNA. If the concentration of the transcription regulator that binds the site were the same in the nucleus and in the bacterium, would the regulator occupy its binding site equally as well in the eukaryotic nucleus as it does in the bacterium? Explain your answer.
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