Organic Chemistry: Anatomy & Physiology Quiz
Chemistry? As much as you may not want to admit it, chemistry — particularly
organic chemistry, or that branch of the field that focuses on carbon-based molecules — is a
crucial starting point for understanding how the human body works. When all is said and
done, the universe boils down to two fundamental components: matter, which occupies
space and has mass; and energy, or the ability to do work or create change.
- 1.
The four key elements that make up most living matter are
- A.
Hydrogen, nitrogen, oxygen, and ammonia
- B.
Hydrogen, nitrogen, oxygen, and carbon
- C.
Hydrogen, nitrogen, oxygen, and potassium
- D.
Sodium, nitrogen, oxygen, and carbon
Correct Answer
B. Hydrogen, nitrogen, oxygen, and carbonExplanation
The correct answer is hydrogen, nitrogen, oxygen, and carbon. These four elements are essential for the composition of most living matter. Hydrogen is a key component of organic molecules, nitrogen is necessary for the synthesis of proteins and nucleic acids, oxygen is involved in cellular respiration, and carbon is the backbone of organic compounds. Ammonia, potassium, and sodium are not as prevalent or crucial for the structure and function of living organisms.Rate this question:
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- 2.
Among the subatomic particles in an atom, the two that have equal weight are
- A.
Protons and neurons
- B.
Protons and neutrons
Correct Answer
B. Protons and neutronsExplanation
That’s why you add them together to determine atomic weight, or mass.Rate this question:
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- 3.
For an atom with an atomic number of 19 and an atomic weight of 39, the total number of neutrons is
- A.
19
- B.
20
- C.
39
- D.
58
Correct Answer
B. 20Explanation
For an atom with an atomic number of 19 and an atomic weight of 39, the total number of neutrons
is b. 20. The atomic number of 19 is the same as the number of protons. The atomic
weight of 39 tells you the number of protons plus the number of neutrons: 39 – 19 = 20.Rate this question:
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- 4.
Element X has 14 electrons. How many electrons are in its outermost shell?
- A.
2
- B.
6
- C.
14
- D.
4
Correct Answer
D. 4Explanation
d. 4. The first orbit
has the maximum two electrons, and the second orbit has the maximum eight electrons. That
makes ten electrons in the first two orbits, leaving only four for the third, outermost orbitRate this question:
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- 5.
A substance that, in water, separates into a large number of hydroxide ions isThe more hydroxide ions there are, the stronger the base is.
- A.
A weak acid
- B.
A weak base
- C.
A strong acid
- D.
A strong base
Correct Answer
D. A strong baseExplanation
A substance that, in water, separates into a large number of hydroxide ions is d. a strong base.
The more hydroxide ions there are, the stronger the base is.Rate this question:
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- 6.
A hydroxyl, or hydroxide, ion has an oxygen atom
- A.
Only
- B.
An extra electron
- C.
And a hydrogen atom and an extra electron
- D.
And a hydrogen atom and one less electron
Correct Answer
C. And a hydrogen atom and an extra electronExplanation
c. and a hydrogen atom and an extra electron.
The first few letters of the word “hydroxide” are a dead giveaway that there’s a hydrogen
atom in there; plus hydroxide ions are negatively charged, which calls for that extra electron.Rate this question:
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Mar 19, 2023Quiz Edited by
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Oct 02, 2009Quiz Created by
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