Question 1

Which of the following best describes the location where you would expect to find most lipids in a eukaryotic cell?

Accepted Answer

In the cell membrane, which is composed primarily of phospholipids

Question 2

Where in a eukaryotic cell would you expect to find DNA?

Accepted Answer

In the nucleus and mitochondria

Question 3

Which of the following is NOT a function of proteins in the cell?

Accepted Answer

Storing genetic information

Question 4

Based on the presence of membrane-bound organelles, the cell shown in the image is:

Accepted Answer

A eukaryote

Question 5

Which of the following best explains why sodium (Na) and chlorine (Cl) form an ionic bond to make table salt (NaCl)?

Accepted Answer

Sodium donates an electron to chlorine, resulting in oppositely charged ions that attract

Question 6

Which of the following statements about atomic structure is correct?

Accepted Answer

Protons and neutrons are found in the nucleus; electrons are found in shells around the nucleus

Question 7

A carbon atom has an atomic number of 6 and a mass number of 12. How many neutrons does it have?

Accepted Answer

$$6$$

Question 8

Which of the following molecules is most likely to form a non-polar covalent bond?

Accepted Answer

O$$_2 ($$oxygen gas)

Question 9

What is the main reason that oxygen and nitrogen atoms are often involved in polar covalent bonds in biological molecules?

Accepted Answer

They have high electronegativity and attract electrons more strongly

Question 10

Which of the following best describes the 'octet rule' as it applies to atoms in biological molecules?

Accepted Answer

Atoms are most stable when their outermost electron shell contains eight electrons

Question 11

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

Accepted Answer

$$3$$

Question 12

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 13

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

Accepted Answer

It will accept an electron to complete its valence shell

Question 14

Which of the following is a correct example of a reduction reaction?

Accepted Answer

Cl + e$$^-$$ $$\rightarrow Cl$^-$$

Question 15

Which of the following best describes the relationship between atomic number and the identity of an element?

Accepted Answer

The atomic number is the number of protons, which defines the element

Question 16

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

Accepted Answer

$$6 + 12 + 6 = 24$$

Question 17

Which of the following statements about chemical bonds is correct?

Accepted Answer

Covalent bonds involve sharing electrons between atoms

Question 18

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

Accepted Answer

Oxygen

Question 19

Which of the following best explains why noble gases like neon (Ne) are chemically unreactive?

Accepted Answer

They have full valence shells, making them stable

The Chemical Context of Life: Atoms, Molecules, and Bonds in Biology

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