객관식
How many Barr bodies does an individual with a chromosomal make-up of XYY have?
428
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2. Cell Chemistry & Cell Components
Isotopes
객관식
What is TRUE about carbon-13 and carbon-14?
A
They are isotopes.
B
They have the same mass number.
C
They have the same number of neutrons in their nuclei.
D
They behave differently in biological reactions.
E
None of the above are true.
검증된 단계별 안내1
Understand the concept of isotopes: Isotopes are variants of a particular chemical element that have the same number of protons but different numbers of neutrons. This means they have the same atomic number but different mass numbers.
Identify the atomic number of carbon: Carbon has an atomic number of 6, which means it has 6 protons in its nucleus.
Determine the number of neutrons in carbon-13 and carbon-14: Carbon-13 has 7 neutrons (13 - 6 = 7) and carbon-14 has 8 neutrons (14 - 6 = 8).
Evaluate the statement about mass number: Since carbon-13 and carbon-14 have different numbers of neutrons, they have different mass numbers (13 and 14, respectively).
Consider their behavior in biological reactions: Isotopes can behave differently in biological reactions due to differences in mass and nuclear stability, which can affect reaction rates and pathways.
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