Question 1

Which of the following best explains why pieces of paper dipped in yeast solution float to the top of cups containing hydrogen peroxide during the catalase enzyme experiment?

Accepted Answer

Oxygen gas is produced as a product of the catalase reaction, causing the paper to float.

Question 2

A student performs an experiment to test the effect of temperature on catalase activity. Which of the following is the dependent variable in this experiment?

Accepted Answer

The rate of oxygen gas production

Question 3

Which of the following best describes what happens to an enzyme when it becomes denatured?

Accepted Answer

Its active site changes shape, preventing substrate binding.

Question 4

Given the chemical equation for photosynthesis:

$$6\ \mathrm{CO}_2 + 6\ \mathrm{H}_2\mathrm{O} + 	ext{light energy} ightarrow \mathrm{C}_6\mathrm{H}_{12}\mathrm{O}_6 + 6\ \mathrm{O}_2$$

Which molecule is reduced during this process?

Accepted Answer

$$\mathrm{CO}_2$$

Question 5

In the leaf disk photosynthesis experiment, why do leaf disks float in the presence of light and a source of carbon dioxide?

Accepted Answer

Photosynthesis produces oxygen gas, which accumulates in the leaf tissue and causes the disks to float.

Question 6

A pigment has an Rf value calculated as follows:

$$\mathrm{Rf} = \frac{	ext{distance traveled by pigment}}{	ext{distance traveled by solvent}}

If a $$pigment moves 2.5 cm and the solvent front moves 5.0 cm, what is the Rf value?

Accepted Answer

$$0.5$$

Question 7

Which of the following best explains why non-polar pigments move farther up the chromatography paper when an organic solvent is used?

Accepted Answer

Non-polar pigments are more soluble in non-polar solvents, so they travel further with the solvent front.

Question 8

Which of the following correctly lists the stages of mitosis in order?

Accepted Answer

Prophase, Metaphase, Anaphase, Telophase

Question 9

Which of the following events occurs during metaphase of mitosis?

Accepted Answer

Chromosomes align at the cell's equatorial plate.

Question 10

A plant cell is observed under a microscope. The chromosomes are lined up in the center of the cell, but not yet separated. Which stage of mitosis is this cell in?

Accepted Answer

Metaphase

Question 11

Which of the following best describes the difference between mitosis and meiosis?

Accepted Answer

Mitosis produces two genetically identical diploid cells, while meiosis produces four genetically unique haploid cells.

Question 12

A cross between a red-flowered plant (RR) and a white-flowered plant (WW) produces offspring with pink flowers (RW). What type of inheritance is this?

Accepted Answer

Incomplete dominance

Question 13

In a dihybrid cross between two heterozygous individuals (AaBb x AaBb), what is the expected phenotypic ratio of the offspring?

Accepted Answer

9:3:3:1

Question 14

Which of the following statements about restriction enzymes is correct?

Accepted Answer

They recognize specific DNA sequences and cut the DNA at or near these sites.

Question 15

A circular plasmid is 6,000 base pairs long. If a restriction enzyme cuts at positions 1,000 bp and 4,000 bp, how many fragments will result and what will their sizes be?

Accepted Answer

Two fragments: 3,000 bp and 3,000 bp

Question 16

During gel electrophoresis, which DNA fragments will migrate the farthest from the wells?

Accepted Answer

The smallest fragments

Question 17

In gel electrophoresis, DNA moves toward the positive electrode because:

Accepted Answer

DNA is negatively charged due to its phosphate backbone.

Question 18

A student hypothesizes that increasing light intensity will increase the rate of photosynthesis in spinach leaf disks. Which of the following is a testable prediction based on this hypothesis?

Accepted Answer

If light intensity increases, then more leaf disks will float in a given time period.

Question 19

Which type of graph is most appropriate for displaying the rate of enzyme activity at different temperatures?

Accepted Answer

A line graph with temperature on the x-axis and rate of activity on the y-axis

BIO 111 Lab Practical 2 Review: Enzymes, Photosynthesis, Mitosis, Genetics, DNA Technology, and Scientific Inquiry

Study Guide - Practice Questions

Study Guide - Flashcards