Question 1

Which of the following fields of microbiology is NOT correctly matched with its corresponding example of application?

Accepted Answer

Mycology - Carbon sequestration of bryophytes

Question 2

How did Redi’s experiment challenge the idea of spontaneous generation?

Accepted Answer

By showing that maggots only appear when flies can lay eggs on the meat.

Question 3

Louis Pasteur’s experiment disproved which theory?

Accepted Answer

Spontaneous generation

Question 4

Daniel is testing the impact of different soil pH levels on cucumber plant growth. He uses acidic, neutral, and alkaline soils and measures the height of the plants after 6 weeks. What are the independent and dependent variables in Daniel’s experiment?

Accepted Answer

Independent Variable: Soil pH level; Dependent Variable: Height of the cucumber plants

Question 5

The statement 'Life can only come from preexisting life' is from which theory?

Accepted Answer

Biogenesis

Question 6

Bacteria are prokaryotic organisms, multiply through binary fission, and have cell walls. Which of the following organisms fits the description of a bacteria?

Accepted Answer

B. anthracis

Question 7

Where do peroxisomes originate?

Accepted Answer

Smooth ER

Question 8

A concentration gradient can occur when:

Accepted Answer

The concentration of one of the substances is high and of the other is low

Question 9

Which of the following organisms does NOT have plasmids?

Accepted Answer

O. sativa

Question 10

Choose which statement is correct regarding mitochondria and related organelles.

Accepted Answer

Statement I

Question 11

Why is penicillin less effective in treating gram-negative bacteria?

Accepted Answer

They have an extra outer membrane.

Question 12

Which phase of mitosis is characterized by the condensation of chromatin into visible chromosomes?

Accepted Answer

Prophase

Question 13

The mechanism that uses ATP energy to pump ions against an electrochemical gradient via transmembrane protein channels is known as ______.

Accepted Answer

active transport

Question 14

Which substance forms the matrix that encases the biofilm and stabilizes the bacterial community?

Accepted Answer

Extracellular polymeric substances

Question 15

Which of the following is responsible for bacterial adherence to cell surfaces?

Accepted Answer

Pili

Question 16

What happens to the plasma membrane during bacterial binary fission?

Accepted Answer

It invaginates toward the center of the cell.

Question 17

Which of the following is NOT considered a prokaryote?

Accepted Answer

Protists

Question 18

Which of the following statements about phase-contrast microscopy is FALSE?

Accepted Answer

It can excite fluorescent molecules in the sample.

Question 19

Who was the scientist credited with observing Saccharomyces cerevisiae under the microscope in the 17th century?

Accepted Answer

Antonie van Leeuwenhoek

Question 20

Acid-fast staining primarily targets acid-fast bacteria such as Mycobacterium spp. Which stain is typically used as a counterstain in this staining technique?

Accepted Answer

Safranin

First Medical Microbiology Exam – Set 1: Key Concepts and Study Guide

Study Guide - Practice Questions

Study Guide - Flashcards