Question 1

Which of the following best describes the function of the condenser in a compound light microscope?

Accepted Answer

It focuses light onto the specimen to improve image clarity.

Question 2

A solution has a pH of 1. How many times greater is its hydrogen ion concentration compared to a solution with pH 3? Use the formula $$[H^+] = 10$$^{-pH}$$.

Accepted Answer

100 times greater

Question 3

Which functional group is present in both amino acids and proteins, and is responsible for forming peptide bonds?

Accepted Answer

Amino group ($$-NH_2$)

Question 4

If a polypeptide is 29 amino acids long, how many peptide bonds does it contain?

Accepted Answer

28

Question 5

When building a triglyceride from its components, how many molecules of water are released?

Accepted Answer

3

Question 6

Which molecule is correctly represented by the formula $$CO_2$$?

Accepted Answer

Carbon dioxide

Question 7

A student adds drops of HCl to a buffer solution and observes a small change in pH. What property of the buffer is being demonstrated?

Accepted Answer

Buffers resist changes in pH when small amounts of acid or base are added.

Question 8

Which of the following is a disaccharide that can be identified by its ball-and-stick model?

Accepted Answer

Maltose

Question 9

Which molecule contains both a carboxyl group and an amino group?

Accepted Answer

Amino acid

Question 10

A student needs to convert 5 milliliters (mL) to microliters ($$\muL). $$What is the correct conversion? ($$1\,\mathrm{mL} = 1,000\,\mu\mathrm{L})$$

Accepted Answer

$$5,000\,\mu\mathrm{L}$$

Question 11

Which of the following is a saturated fatty acid?

Accepted Answer

A fatty acid with only single bonds between carbon atoms

Question 12

Which molecule is the main energy currency of the cell?

Accepted Answer

ATP (adenosine triphosphate)

Question 13

Which part of the microscope is used to adjust the amount of light passing through the specimen?

Accepted Answer

Diaphragm

Question 14

Which of the following molecules is a monounsaturated fatty acid?

Accepted Answer

A fatty acid with one double bond in its carbon chain

Question 15

Which of the following is NOT a function of a lab notebook?

Accepted Answer

Storing chemical reagents for future experiments

Question 16

Which molecule is correctly identified as $$O_2$$?

Accepted Answer

Oxygen

Question 17

A student observes a specimen under the microscope and identifies it as a tick. Which feature is most likely used for this identification?

Accepted Answer

Presence of eight legs

Question 18

Which of the following best describes a peptide bond?

Accepted Answer

A covalent bond between the carboxyl group of one amino acid and the amino group of another

Question 19

Which molecule is a steroid commonly found in animal cell membranes?

Accepted Answer

Cholesterol

Question 20

If a buffer solution has a pH range of 6.5 to 7.5, what is the buffer range?

Accepted Answer

$$1.0$$

General Biology Lab Study Guide: Measurements, Acids & Bases, Molecules, and Microscopy

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