Question 1

Which of the following best describes diffusion as observed in the Diffusion Lab?

Accepted Answer

The movement of molecules from an area of high concentration to an area of low concentration, driven by random molecular motion.

Question 2

In the Diffusion Lab, what did the sensor/probe measure to determine if diffusion occurred?

Accepted Answer

The pH of the solution.

Question 3

Why did the pH increase rather than decrease in the beaker during the diffusion experiment with ammonia?

Accepted Answer

Ammonia is a base and increases the concentration of hydroxide ions, raising the pH.

Question 4

How does increasing temperature affect the rate of diffusion, and why?

Accepted Answer

It increases the rate of diffusion because molecules have more kinetic energy and move faster.

Question 5

What does a slope of zero indicate in the context of the diffusion experiment's data graph?

Accepted Answer

The system has reached equilibrium and there is no net movement of molecules.

Question 6

If a second probe were placed at the point where ammonia was added, how would its pH readings compare to the first probe at the start and after equilibrium is reached?

Accepted Answer

Initially, the second probe would read a higher pH, but eventually both probes would show the same pH as equilibrium is reached.

Question 7

Which statement best distinguishes static equilibrium from dynamic equilibrium in the context of diffusion?

Accepted Answer

Static equilibrium involves no molecular movement, while dynamic equilibrium involves continuous movement with no net change.

Question 8

Which of the following best describes osmosis?

Accepted Answer

The movement of water molecules from an area of low solute concentration to high solute concentration across a semipermeable membrane.

Question 9

In the Osmosis Lab, which egg showed the greatest change in mass and why?

Accepted Answer

The egg in the hypotonic solution, because water entered the egg, increasing its mass.

Question 10

How do decalcified eggs serve as a model for cells in the osmosis experiment?

Accepted Answer

Their semipermeable membrane allows water but not large solutes to pass, similar to a cell membrane.

Question 11

What happens to red blood cells placed in a hypertonic solution?

Accepted Answer

They shrink as water leaves the cell.

Question 12

Which equation correctly represents cellular respiration of glucose?

Accepted Answer

$$\mathrm{C_6H_{12}O_6$} + 6\,\mathrm{O_2$} ightarrow 6\,\mathrm{CO_2$} + 6\,\mathrm{H_2O} + 	ext{energy}$$

Question 13

During the Cellular Respiration Lab, what did the sensor/probe measure to detect cellular respiration, and why?

Accepted Answer

It measured the concentration of carbon dioxide ($$\mathrm{CO_2$}) $$because it is a product of cellular respiration.

Question 14

What is germination, and what do seeds require to germinate?

Accepted Answer

Germination is the resumption of growth in a seed; seeds require moisture, oxygen, and suitable temperature.

Question 15

Which organelle is most important for cellular respiration in eukaryotic cells?

Accepted Answer

Mitochondrion

Question 16

What are the three stages of cellular respiration, and where does each occur in the cell?

Accepted Answer

Glycolysis (cytoplasm), Krebs cycle (mitochondrial matrix), Electron Transport Chain (inner mitochondrial membrane)

Question 17

During which stage of cellular respiration is the most ATP produced?

Accepted Answer

Electron Transport Chain

Question 18

A decalcified egg is placed in a solution and its mass increases significantly. Which type of solution is it in, and what is the direction of water movement?

Accepted Answer

Hypotonic; water moves into the egg.

Question 19

In the Cellular Respiration Lab, where did the reactants for cellular respiration come from in the experiment with germinating seeds?

Accepted Answer

Glucose stored in the seed and oxygen from the air.

BIO 1060 Lab Exam 2 Study Guide – Step-by-Step Guidance for General Biology Concepts

Guida di studio - Domande di pratica

Study guide - Flashcard