Numerade

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Jenny Wu

Numerade educator

Which of the statements below is/are correct, and which is/are incorrect? 1-From the place on a chromosome where replication begins, the chromosome is replicated bidirectionally and on both strands. 2-DNA strands are "antiparallel." 3-The only way to go in both directions away from the beginning is to synthesize 5' to 3' on one strand, but 3' to 5' on the other strand. A. All three statements are incorrect. B. Statements 1 and 2 are incorrect; 3 is correct. C. Statement 1 is incorrect; 2 and 3 are correct. D. Statements 1 and 2 are correct; 3 is incorrect. E. All three statements are correct. A B C D E

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ANSWERED

Supreeta N

Numerade educator

Question 3 Choose the correct statement below: 1. At the end of a complete round of respiration, the cell has netted: ATP, NADH, NADP 2. At the end of a complete round of respiration, the cell has netted: ATP, NADH 3. At the end of a complete round of respiration, the cell has netted: ATP 4. At the end of a complete round of respiration, the cell has netted: ATP, NAD 5. At the end of a complete round of respiration, the cell has netted: NAD 1 2 3 4 5

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Aishwarya Krishnakumar

Numerade educator

If energy-coupling between the reactions ATP ---> ADP and H---> H-P is direct, how many enzymes and how many steps are required, and how is coupling accomplished? A) One enzyme, two steps; the enzyme binds ATP and P at the same time. B) One enzyme, one step; the enzyme binds ATP and P at the same time. C) One enzyme, one step; the enzyme binds ATP and ADP at the same time. D) One enzyme, one step; the enzyme binds ATP and H at the same time. E) Two enzymes, two steps; one enzyme binds ATP and one binds H at the same time.

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David Morabito

Numerade educator

Question 5 Three infinite straight wires are parallel to each other and a distance of d = 21 cm apart. The currents are: I1 = 20 A, I2 = 8 A, I3 = 23 A. The directions of the currents are indicated in the figure. Determine the magnitude of the net magnetic field at a point midway between wire #1 and wire #2 (in ?T).

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Katlin Koehn

Numerade educator

How can we say our cells are bathed in isotonic fluids if the concentration of potassium ions inside cells does not equal the concentration of potassium ions outside cells? In fact, why don't our cells burst? A.The concentration of potassium ions inside cells DOES equal the concentration of potassium ions outside cells. B. Potassium ions are constantly pumped inside cells in order to equal the concentration of potassium ions outside cells. C. The concentration of potassium ions inside cells only "matters" to potassium ions and does not affect osmosis because water is measuring its own concentration compared to solutes. D. The concentration of potassium ions inside cells exactly equals the concentration of sodium ions outside cells. E. The concentration of potassium ions inside cells is much less than the concentration of potassium ions outside cells, so cells lose water instead of bursting.

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Bryan Valdivia

Numerade educator

Choose all descriptions in the following list that apply to allosteric regulation. 1. Depends on concentration of effector _____ 2. Requires an enzyme to activate or inactivate the protein ______ 3. Uses a single enzyme for activation and inactivation of the protein ______ 4. Involves non-covalent binding of regulating molecule ______ 5. Involves covalent bond(s) _______ 6. Is always positive; that is, having the effector or phosphate group bound to the protein activates the protein _____ 7. Involves binding of something to a site different from the functional (active) site of the protein ____ 8. Causes conformational changes in the protein affecting the functional (active) site____ A) 1, 2, 4, 6 B) 2, 5, 7, 8 C) 1, 3, 7, 8 D) 1, 4, 7, 8 E) 2, 5, 6, 8

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AWAITING AN EDUCATOR

Number of colonies on each plate (separate numbers with commas) \begin{tabular}{|l|c|c|c|} \hline \multicolumn{2}{|c}{ Group } & NA & amp \\ \hline 1 & \( 264,267,291 \) & 76 & 52 \\ \hline 2 & \( 263,272,343 \) & 94 & 41 \\ \hline 3 & \( 273,373,307 \) & 84 & 137 \\ \hline 4 & \( 325,413,500 \) & 102 & 117 \\ \hline 5 & \( 298,248,273 \) & 109 & 85 \\ \hline 6 & \( 13,24,27 \) & 9 & 9 \\ \hline 7 & \( 42,42,38 \) & 7 & 17 \\ \hline 8 & \( 43,34,7 \) & 7 \\ \hline \end{tabular}

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ANSWERED

Farhan Anwar

Numerade educator

Top left plate = A, top right plate = B, bottom left plate = C, bottom right plate = D.

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Supreeta N

Numerade educator

a) Draw the generic structure of an amino acid at pH 7. Draw all atoms and all bonds, except use R for the generic side chain. b) Draw aspartic acid as it would be alone in solution at pH 7. Draw all atoms and all bonds. c) Draw lysine as it would be alone in solution at pH 7. Draw all atoms and all bonds.

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Supreeta N

Numerade educator

6. a) Draw three glucose molecules joined by a,1, 4 linkages. You only need to show O's and the H's attached to O's. You may draw ring or chair forms of glucose. (Be sure to draw each glucose so you do not use any curls or right angles for covalent bonds, just one straight line.) b) Draw three glucose molecules joined by b, 1, 4 linkages. You only need to show O's and the H's attached to O's. (Be sure to draw each glucose so you do not use any curls or right angles for covalent bonds, just one straight line.)

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Karl V.