Question 1

Which of the following cellular locations would you expect to find the highest concentration of DNA in a eukaryotic cell?

Accepted Answer

Nucleus

Question 2

Which of the following best describes the chemical behavior of an atom with a full valence shell?

Accepted Answer

It is stable and unlikely to react with other atoms.

Question 3

A sodium atom (Na) reacts with a chlorine atom (Cl) to form sodium chloride (NaCl). What type of bond is formed between Na and Cl?

Accepted Answer

Ionic bond

Question 4

Which of the following elements is most abundant in the human body by mass?

Accepted Answer

Oxygen

Question 5

How many covalent bonds can a nitrogen atom typically form, based on its number of valence electrons?

Accepted Answer

$$3$$

Question 6

Which of the following molecules contains a polar covalent bond?

Accepted Answer

H$$_2O$$

Question 7

What is the atomic number of carbon, and what does it represent?

Accepted Answer

$$6$$, representing the number of protons

Question 8

Which of the following best explains why water (H$$_2O) is a $$polar molecule?

Accepted Answer

Oxygen is more electronegative than hydrogen, creating partial charges

Question 9

If an atom has 7 electrons in its outer shell, what is its most likely behavior in a chemical reaction?

Accepted Answer

Accept an electron to complete its valence shell

Question 10

Which of the following statements about the periodic table is correct?

Accepted Answer

Elements in the same group have similar chemical properties

Question 11

A molecule of glucose has the formula $$\mathrm{C_6H_{12}O_6$}. $$How many total atoms are present in one molecule of glucose?

Accepted Answer

$$24$$

Question 12

Which of the following best describes the difference between a molecule and an atom?

Accepted Answer

A molecule is made of two or more atoms bonded together

Question 13

Which of the following is a property of a covalent bond?

Accepted Answer

Electrons are shared between atoms

Question 14

Which of the following best explains why sodium (Na) is highly reactive?

Accepted Answer

It has one electron in its outermost shell, which it readily loses

Question 15

Which of the following best describes the process of oxidation in a redox reaction?

Accepted Answer

An atom loses electrons

Question 16

Which of the following is true about the structure of an atom?

Accepted Answer

Protons and neutrons are found in the nucleus

Question 17

Which of the following best describes the 'octet rule'?

Accepted Answer

Atoms are most stable with 8 electrons in their outermost shell

Question 18

Which of the following is a real-life example of an ionic compound formed by electron transfer?

Accepted Answer

Sodium chloride ($$\mathrm{NaCl})$$

Question 19

Which of the following best explains why oxygen is highly electronegative?

Accepted Answer

It has a nearly full valence shell and strongly attracts electrons

Question 20

Which of the following statements about biomolecules is correct?

Accepted Answer

Biomolecules have polarity due to differences in electronegativity

Fundamental Chemistry and Cell Structure for General Biology

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