Question 1

Which of the following best describes a hypothesis in the context of scientific research?

Accepted Answer

An educated guess that can be tested through experiments

Question 2

Why is carbon uniquely suited to form the backbone of complex biological molecules?

Accepted Answer

It can form four covalent bonds, allowing for diverse molecular structures

Question 3

A scientist observes two water molecules interacting. What type of bond is most likely forming between them?

Accepted Answer

Hydrogen bond

Question 4

Which of the following statements about oxidation is correct?

Accepted Answer

A molecule loses covalent bonds or hydrogens

Question 5

A patient’s blood pH suddenly drops below the normal range. What is the most likely consequence at the molecular level?

Accepted Answer

Proteins will denature, losing their function

Question 6

Which of the following is a requirement for a molecule to be classified as organic?

Accepted Answer

It must contain carbon atoms, typically bonded to hydrogen atoms

Question 7

Which process is responsible for building larger biological molecules by removing water?

Accepted Answer

Dehydration synthesis

Question 8

Glycogen is best described as which type of macromolecule?

Accepted Answer

A carbohydrate (specifically a polysaccharide)

Question 9

Which organelle is present in both prokaryotic and eukaryotic cells?

Accepted Answer

Ribosome

Question 10

A doctor is examining liver tissue. Which organelle would be especially abundant in these cells due to their role in breaking down waste and toxins?

Accepted Answer

Lysosome

Question 11

The phosphate head of a phospholipid is:

Accepted Answer

Hydrophilic

Question 12

Unsaturated fats are typically liquid at room temperature because:

Accepted Answer

They have double bonds that create kinks in the fatty acid chains

Question 13

A human red blood cell is placed in a 1% salt water solution. What type of solution is this, and what will happen to the cell?

Accepted Answer

Hypertonic; the cell will shrink

Question 14

Which of the following best defines metabolism?

Accepted Answer

The sum of all chemical reactions in the body

Question 15

What is the main function of the cell membrane?

Accepted Answer

To allow selective passage of substances in and out of the cell

Question 16

Which statement best describes the relationship between transcription and translation?

Accepted Answer

Transcription produces mRNA, which is then read during translation to assemble amino acids into proteins

Question 17

During cellular respiration, what is the overall chemical equation for glycolysis?

Accepted Answer

$$C_6H_{12}O_6$ + 2NAD^+ + 2ADP + 2P_i ightarrow 2	ext{pyruvate} + 2NADH + 2ATP + 2H_2O$$

Question 18

What is the main function of the electron transport chain (ETC) in cellular respiration?

Accepted Answer

To separate hydrogens and electrons, creating a gradient that drives ATP synthesis

Question 19

Which of the following best describes the Calvin cycle?

Accepted Answer

It creates glucose and does not require light directly

Question 20

You observe a cell under a microscope and see a cell plate forming. What type of cell is this, and what phase is it in?

Accepted Answer

Plant cell; telophase (cytokinesis starting)

Question 21

What is the primary role of an enzyme in a chemical reaction?

Accepted Answer

To act as a catalyst and increase the reaction rate

Biology Final Exam Study Guide – Step-by-Step Guidance

Study Guide - Practice Questions