Question 1

Which of the following best describes the difference between qualitative and quantitative data in biological research?

Accepted Answer

Qualitative data involves descriptions and categories, while quantitative data involves measurements and numbers.

Question 2

A scientist is testing the effect of a new fertilizer on plant growth. She sets up two groups: one receives the fertilizer, and the other does not. What is the purpose of the group that does not receive fertilizer?

Accepted Answer

It serves as a negative control to compare the effect of the fertilizer.

Question 3

Which of the following correctly describes the difference between an ionic bond and a covalent bond?

Accepted Answer

Ionic bonds involve the transfer of electrons, while covalent bonds involve the sharing of electrons.

Question 4

Given an atom with atomic number $$Z = 8$$ and mass number $$A = 16$$, how many neutrons does it have?

Accepted Answer

$$8$$ neutrons

Question 5

Which property of water allows insects to walk on its surface and plants to transport water from roots to leaves?

Accepted Answer

Cohesion and adhesion due to hydrogen bonding

Question 6

A solution has a pH of $$3. $$Which of the following statements is true?

Accepted Answer

The solution is acidic and has a high concentration of H$$^+$$ ions.

Question 7

Which functional group is characterized by the formula $$-COOH$$ and acts as an acid in organic molecules?

Accepted Answer

Carboxyl

Question 8

Which of the following best explains why water has a high specific heat?

Accepted Answer

Hydrogen bonds between water molecules require more energy to break, increasing the specific heat.

Question 9

A buffer solution is added to a solution of strong acid. What is the primary function of the buffer?

Accepted Answer

To maintain a relatively constant pH by neutralizing added acid or base.

Question 10

Which of the following is an example of a polar covalent bond?

Accepted Answer

The bond between hydrogen and oxygen in H$$_2O$$

Question 11

How many moles are present in $$18$$ grams of water ($$H_2O$$)? (Molar mass of $$H_2O = 18 g/$$mol)

Accepted Answer

$$1$$ mole

Question 12

Which of the following best describes the difference between hydrophilic and hydrophobic substances?

Accepted Answer

Hydrophilic substances dissolve easily in water, while hydrophobic substances do not.

Question 13

Which of the following is NOT a major aspect required for an organism to be considered 'alive'?

Accepted Answer

Ability to move

Question 14

Which type of reasoning starts with general principles and uses them to predict specific results?

Accepted Answer

Deductive reasoning

Question 15

A chemical reaction is represented by the equation: $$2H_2 + O_2$ \rightarrow 2H_2O. $$Which of the following statements is true?

Accepted Answer

The number of atoms of each element is balanced on both sides of the equation.

Question 16

Which of the following is a structural isomer?

Accepted Answer

Molecules with the same molecular formula but different connectivity of atoms.

Question 17

Which functional group is found in ATP and is important for energy transfer in cells?

Accepted Answer

Phosphate group

Question 18

Which of the following best explains why ice floats on water?

Accepted Answer

Ice is less dense than liquid water because hydrogen bonds hold water molecules further apart in the solid state.

Question 19

Which of the following is the correct formula for calculating molarity ($$M) of a $$solution?

Accepted Answer

$$M = \frac{	ext{moles of solute}}{	ext{volume of solution (L)}}$$

Question 20

Which of the following best describes the role of valence electrons in chemical bonding?

Accepted Answer

Valence electrons determine how atoms bond and interact to form molecules.

General Biology: Foundations, Chemistry of Life, and Organic Molecules

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