Q: Which of the following is a correct conversion from millimeters (mm) to micrometers ($$\mum$$)?

$$1 \text{ mm} = 1000 \mu\text{m}$$

Q: A student needs to convert 5 cm to mm. What is the correct conversion?

$$5 \text{ cm} = 50 \text{ mm}$$

Q: If the length of an organism is measured as 0.5 mm, what is this length in micrometers ($$\mum$$)?

$$0.5 \text{ mm} = 500 \mu\text{m}$$

Question 1

Which of the following best describes a selectively permeable membrane?

Accepted Answer

A membrane that allows certain molecules or ions to pass while restricting others.

Question 2

You are given a sample and asked to test for the presence of reducing sugars. Which reagent should you use, and what color change indicates a positive result?

Accepted Answer

Benedict's; blue to orange/red

Question 3

A student observes a cell under a microscope at 40x objective and 10x ocular lens. What is the total magnification?

Accepted Answer

$$40 	imes 10 = 400$$

Question 4

Which of the following is a correct conversion from millimeters (mm) to micrometers ($$\mum$$)?

Accepted Answer

$$1 	ext{ mm} = 1000 \mu	ext{m}$$

Question 5

Which functional group is present in all amino acids?

Accepted Answer

Carboxyl group

Question 6

A dialysis bag containing a 10% sucrose solution is placed in pure water. What will happen to the bag due to osmosis?

Accepted Answer

Water will move into the bag, causing it to swell.

Question 7

Which test is used to detect the presence of proteins, and what is the expected color change for a positive result?

Accepted Answer

Biuret; blue to violet

Question 8

Which organelle is responsible for energy production in animal cells?

Accepted Answer

Mitochondrion

Question 9

If a solution is hypertonic compared to a cell, what will happen to the cell?

Accepted Answer

The cell will shrink as water leaves.

Question 10

Which of the following best describes the role of an enzyme in a chemical reaction?

Accepted Answer

Enzymes lower the activation energy, speeding up the reaction.

Question 11

A student needs to convert 5 cm to mm. What is the correct conversion?

Accepted Answer

$$5 	ext{ cm} = 50 	ext{ mm}$$

Question 12

Which of the following statements about diffusion is correct?

Accepted Answer

Diffusion moves molecules from high to low concentration.

Question 13

Which part of the microscope is responsible for adjusting the amount of light that reaches the specimen?

Accepted Answer

Diaphragm

Question 14

A solution with a pH of 3 is considered:

Accepted Answer

Acidic

Question 15

Which of the following is an example of a polysaccharide?

Accepted Answer

Starch

Question 16

If the length of an organism is measured as 0.5 mm, what is this length in micrometers ($$\mum$$)?

Accepted Answer

$$0.5 	ext{ mm} = 500 \mu	ext{m}$$

Question 17

Which factor would most likely increase the rate of enzyme activity?

Accepted Answer

Increasing substrate concentration up to a certain point

Question 18

Which of the following best describes active transport?

Accepted Answer

Movement of molecules from low to high concentration using energy

Question 19

A student is asked to identify the functional group in a nucleotide. Which group is present?

Accepted Answer

Phosphate group

Question 20

Which of the following statements about osmosis is correct?

Accepted Answer

Osmosis is the movement of water across a selectively permeable membrane.

BIOL 210 Modern Lab Practical Review: General Biology Study Guide

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