Trial

Prokaryotes

Quiz Type

Practice

Subject

Biology

Level

Level 100

Questions

10 questions

Created By

Zahara Soalihu

Quick Rules

Time limit: 10 minutes
Multiple attempts are not allowed
All questions must be answered to submit

Share Quiz

Share via Email

Share Link

Share on Social Media

Quiz Questions Preview

Edit Questions

Question 1 of 10

Question 1

True false Understanding

Prokaryotes are single-celled organisms without a nucleus.

True

Correct

False

Explanation

This statement is true because prokaryotes, which include bacteria and archaea, lack a membrane-bound nucleus and are primarily unicellular organisms. This characteristic distinguishes them from eukaryotes, which have a well-defined nucleus.

Question 2

True false Understanding

All prokaryotes are harmful to humans and the environment.

True

False

Correct

Explanation

This statement is false. While some prokaryotes can cause diseases, many others are beneficial. For example, certain bacteria are essential for nitrogen fixation in soil and help in digestion in the human gut, highlighting the diversity of roles prokaryotes play.

Question 3

True false Understanding

Prokaryotes reproduce exclusively through sexual reproduction.

True

False

Correct

Explanation

This statement is false. Prokaryotes primarily reproduce asexually through binary fission, which is a simpler and faster process compared to sexual reproduction. While some prokaryotes can undergo genetic exchange through processes such as conjugation, transformation, or transduction, this is not considered sexual reproduction.

Question 4

Assertion reason Analyzing

Assertion (A): Prokaryotes are single-celled organisms that lack a membrane-bound nucleus. Reason (R): The absence of a membrane-bound nucleus is a defining characteristic of prokaryotic cells that distinguishes them from eukaryotic cells.

Both A and R are true, and R is the correct explanation of A

Correct

Both A and R are true, but R is NOT the explanation of A

A is true but R is false

A is false but R is true

Explanation

Prokaryotes, defined by their lack of a membrane-bound nucleus, are distinctly different from eukaryotic organisms in terms of cellular structure. The reason highlights that this absence is a key characteristic that defines prokaryotic cells, thus making it the correct explanation of the assertion.

Question 5

Basic multiple choice Remembering

What type of organisms are prokaryotes?

Single-celled organisms without a nucleus

Correct

Multi-celled organisms with a nucleus

Organisms that can perform photosynthesis

Complex organisms with specialized cells

Explanation

Prokaryotes are single-celled organisms that lack a defined nucleus, distinguishing them from eukaryotic organisms, which are usually complex and multi-celled.

Question 6

Basic multiple choice Understanding

What is a characteristic feature of prokaryotic cells?

They lack membrane-bound organelles

Correct

They have a complex endoplasmic reticulum

They contain multiple linear chromosomes

They possess a nucleus

Explanation

Prokaryotic cells are characterized by the absence of membrane-bound organelles, which is a defining feature that sets them apart from eukaryotic cells.

Question 7

Basic multiple choice Remembering

Which of the following is an example of a prokaryote?

Bacteria

Correct

Fungi

Plants

Animals

Explanation

Bacteria are a primary example of prokaryotic organisms. In contrast, fungi, plants, and animals are all categorized as eukaryotes.

Question 8

Basic multiple choice Understanding

How do prokaryotes reproduce?

Asexually through binary fission

Correct

Sexually through meiosis

By budding from a parent cell

Through spores released into the environment

Explanation

Prokaryotes typically reproduce asexually through a process called binary fission, where a single cell divides into two identical cells.

Question 9

Complex multiple choice Applying

A scientist conducts an experiment comparing the metabolic processes of prokaryotes in extreme environments versus those in more moderate conditions. Which analogy best describes the primary advantage of prokaryotes in extreme environments?

Prokaryotes function like Swiss Army knives, providing diverse tools for survival in varied environments.

Correct

Prokaryotes act as speedboats, allowing for rapid growth and reproduction without adaptation.

Prokaryotes resemble elephants, relying on large size and mass to overcome environmental challenges.

Prokaryotes operate like clocks, requiring precise conditions to thrive and function effectively.

Explanation

The analogy of prokaryotes functioning like Swiss Army knives highlights their ability to utilize various metabolic pathways and adapt to extreme environments, showcasing their versatility. The other options misrepresent prokaryotic characteristics, emphasizing speed, size, or precision rather than adaptability.

Question 10

Complex multiple choice Understanding

In a hypothetical situation, a researcher isolates a new prokaryotic organism that thrives in highly acidic environments. Which characteristic of prokaryotes most likely enables its survival in such conditions?

The presence of a rigid cell wall that offers protection against pH fluctuations.

The ability to perform fermentation, providing energy in low-oxygen conditions.

The possession of unique enzymes that can function optimally at low pH levels.

Correct

The lack of membrane-bound organelles that allows for simpler cellular processes.

Explanation

The unique enzymes present in prokaryotes that function optimally at low pH levels are essential for their survival in acidic environments. The other options suggest characteristics that do not directly relate to the prokaryotes' enzymatic activity in such conditions.