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Brrunno [24]
3 years ago
7

Edmond's diet consists mostly of hamburgers, french fries, and other fast food items. He does not exercise often and lives a sed

entary life. Edmond's family has a history of heart disease. Both of his parents had heart attacks during their 70s, and his grandparents also had heart attacks during their later years. Edmond has a heart attack at 45. Which of the following likely contributed to his heart attack?
I. genetics
II. nutrition
III. lifestyle

A. I only
B. I, II, and III
C. I and III only
D. II only
Biology
1 answer:
kherson [118]3 years ago
5 0

Answer:

The answer is B.

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Frameshift mutations change the entire protein sequence and messes up the entire amino acid sequence that occurs after mutations, but substitution only changes one single amino acid.

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The smallest unit capable of carrying out life functions is:
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The negative effects of tilling include _____. A increased soil erosion B reduced soil drainage C reduced need for energy input
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Answer:

A

Explanation:

Tilling agitates the topsoil and removes ‘unnecessary’ vegetation so the main crop can grow without competition. Tilling improves soil aeration and drainage for plants to grow well.  Nonetheless, it can lead to other consequences such as soil erosion because it loosens the soil and makes it easy to be carried away by wind and water.

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A researcher synthesizes a new molecule called inhibitor X that inhibits the activity of phosphofructokinase (PFK), the enzyme t
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Answer : The dissociation constant of the PFK‑inhibitor complex is, 5 µM

Explanation :

The expression for reversible competitive inhibition when apparent Km affected by addition of the inhibitor is:

K_m_a=K_m[1+\frac{I}{K_i}]

where,

K_m_a = apparent value = 52 µM

K_m = Michaelis–Menten constant = 40 µM

I = inhibitor concentration = 1.5 µM

K_i = dissociation constant of the PFK‑inhibitor complex

Now put all the given values in the above formula, we get:

52\mu M=40\mu M[1+\frac{1.5\mu M}{K_i}]

K_i=5\mu M

Therefore, the dissociation constant of the PFK‑inhibitor complex is, 5 µM

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