Question

What is the peculiarity of chemoautotrophs?
A. Synthesize their own organic food.
B. Pick up energy from chemical reaction
C. Convert light energy into chemical energy
D. Both a and b

Answer 1

Hint: Based on their manner of modes of nutrients, all lifeforms on Earth can be divided into categories. Autotrophs are plants that can capture and transform sunlight into usable energy. Animals are classed as heterotrophs since they obtain their energy from other organic sources. Chemotrophic organisms are another type of organism that can receive energy from chemical processes.

Complete answer:
Option A: Chemoautotrophs are cells that use inorganic chemicals to produce their own energy and biological components.
So, option A alone is not correct.
Option B: Chemoautotrophs are creatures that can synthesise essential organic chemicals from gases such as carbon dioxide, in addition to deriving energy through chemical reactions.
So, option B alone is not correct.
Option C: Chemical reactions can provide energy to chemotrophic organisms. Phototrophs, on the other hand, use sun energy and are referred to as chemotrophs.
So, option C is incorrect.
Option D: Chemoautotrophs are cells that manufacture their own energy and biological components using inorganic chemicals. Chemoautotrophs are animals that can make vital organic molecules from gases like carbon dioxide, as well as derive energy from chemical interactions.
So, option D is correct.

Therefore, Option D is the correct answer.

Note:
Chemoautotrophs are creatures that can synthesise essential organic chemicals from gases such as carbon dioxide, in addition to deriving energy through chemical reactions. Autotrophs use sunlight as their principal source of energy; chemoautotrophs, on the other hand, utilise hydrogen sulphide, ammonia, and other chemicals. The majority of chemoautotrophs are extremophiles, bacteria or archaea that thrive in harsh settings and are the dominant producers in these ecosystems.