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allochka39001
2 months ago
8

true or false: All substances can pass freely between the intracellular and extracellular fluids through a phospholipid bilayer.

Biology
2 answers:
Tresset [2.2K]2 months ago
7 0

Answer:

False

Explanation:

If this were correct, it would compromise the cells' internal environment, similarly to how not every key opens a keyhole; hence, not every molecule has the "key" for entering the intracellular and extracellular fluids across a phospholipid bilayer. Generally, small hydrophobic ("water-repellent") substances can pass through this bilayer.

garik1379 [2K]2 months ago
6 0

Answer:

False

Explanation:

If this were indeed accurate, it would threaten the internal balance of our cells; akin to how not all keys fit in locks, not every molecule possesses the "key" needed to transport across the phospholipid bilayer into and out of the intracellular and extracellular fluids. Typically, small hydrophobic ("water-repelling") molecules can traverse this bilayer.

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Answer:

D. Aa

Explanation:

Provided:

Jill (the mother) is heterozygous regarding gene A --------- Jill = Aa

Jack (the father) is homozygous recessive for gene A-------- Jack = aa

Now, when fertilization takes place, we result in:

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a        Aa        aa

a        Aa        aa

The offspring combinations are (Aa, Aa, aa, aa)

Nondisjunction refers to the failure of homologous chromosomes to separate correctly during cell division. In this scenario, it is stated that the fertilization experienced nondisjunction during meiosis 1, leading both homologous chromosomes to migrate into one daughter cell instead of distributing to two due to improper separation.

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3 months ago
In one to three sentences, describe what happens during the regeneration stage of the Calvin cycle.
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3 months ago
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If you were shipping green bananas to a supermarket thousands of miles away, which of the following chemicals would you want to
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Answer:

Ethylene. (Ans. D)

Explanation:

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Therefore, when transporting green bananas over long distances to stores, the ethylene gas should be removed from their surrounding environment.

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3 months ago
How much more [H+] does lemon juice (pH 2) have compared with pure water (pH 7)? Remember that each pH unit represents a 10 fold
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Answer:

10^5 \\or\\100,000

Explanation:

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pH = -[log H+]\\

It's also stated that each pH unit indicates a tenfold change in hydrogen ion concentration.

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While for pure water, which has a pH of 7, the concentration is

10^ -7\\= \frac{1}{10000000}

Thus, the concentration of H+ ions in lemon juice is 10^5 times greater than in pure water.

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After watching the squirrels at the local park for several days, Sergei asks his science teacher the following question: "Do mor
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