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elena-14-01-66 [18.8K]
3 years ago
8

How does the nucleus control cellular activity?

Chemistry
1 answer:
eimsori [14]3 years ago
3 0
The nucleus directs all cellular activities by controlling the synthesis of proteins. ... The nucleus contains encoded instructions for the synthesis of proteins in a helical molecule called deoxyribonucleic acid (DNA). The cell's DNA is packaged within the nucleus in a structural form called chromatin.
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Which pair of elements has the most similar Lewis structures?
jonny [76]

Answer: C.)

Explanation:

8 0
2 years ago
The diameter of a cream-filled cookie is approximately 44 millimeters (mm). An atom of bismuth (Bi) is approximately 320. picome
KATRIN_1 [288]

Answer:

1.4e+8 bismuth atoms

Explanation:

If           10³ mm = 10¹² pm

then     44 mm = X pm

X = (44 × 10¹²) / 10³ = 44 × 10⁹ pm (which is the cookie diameter in picometers)

Now we can calculate the number of bismuth atoms needed to span the diameter of the cookie:

number of bismuth atoms = cookie diameter / bismuth atom diameter

number of bismuth atoms = 44 × 10⁹ / 320 = 0.1375 × 10⁹ atoms = 1.375 × 10⁸ atoms

And now to respect the answer format requested by the problem:

1.375 × 10⁸ = 1.375e+8 ≈ 1.4e+8

6 0
4 years ago
Which statement about Schrödinger's theory of the atomic model is true?
vekshin1

Answer : Option C) It explained the odds of finding the position of an electron.

Explanation : Schrödinger's theory of the atomic model is true for the probability of finding the electron around the nucleus. Schrödinger used odd mathematical equations to describe the likelihood of finding an electron in a certain position around the nucleus. This atomic model was known as the quantum mechanical model of the atom. He posed an equation which is now called as the Schordinger’s Wave Equation, which incorporates both the wave-like and particle-like behaviors of electrons, which stated that electrons can act like waves/light and particles. Which later helped to develop the uncertainty principle for finding the probable position of the electron.

4 0
4 years ago
write a checklist with at least three entries for how you can evaluate whether scientific information is reliable
Lilit [14]

Answer:

Was the information obtained from government or academic websites? Was the information published in scientific journals, articles, books, and researches? Was the information published by advertisers?

Explanation:

If the first two questions are a yes and the third question is a no, your good to go.

8 0
3 years ago
Read 2 more answers
Calcium is an element With an atomic number of 20. The most common atoms of calcium have a mass number of 40. But some Atoms of
GREYUIT [131]

Answer:

Calcium is an element With an atomic number of 20. The most common atoms of calcium have a mass number of 40. But some Atoms of calcium have a mass number of 44

What is meant but the tears atomic number

8 0
3 years ago
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