Question

Which of the following structures serves as the cell's boundary from its environment?

a. chloroplast
b. cell membrane
c. Mitochondrion
d. channel protein​

Answer 1

Explanation:

b) cell membrane..serves as clear boundary between cell's internal and external environment..

hope it helps☺️

Answer 2

Cell membrane has structures serves as the cell's boundary from its environment.

Explanation:

• Option (B) Cell membrane is correct answer.
• The cell membrane, also known as the plasma membrane, is found in all cells and serves to separate the cell's interior from the outside world.
• The cell membrane is made up of a partially permeable lipid bilayer.
• The cell membrane controls the flow of materials into and out of the cell.
• Option (A) Chloroplast is incorrect answer.
• A chloroplast is a kind of organelle found in the cells of plants and algae that is essential for photosynthesis, or the transformation of solar energy into chemical energy for growth.
• Option (C) Mitochondrion is incorrect answer.
• Mitochondrion are membrane-bound cell organelles that provide the majority of the molecular energy it takes to fuel the cell's metabolic activities.
• Adenosine triphosphate is a tiny protein that retains the chemical energy created by mitochondria (ATP).
• Option (D) Channel protein is incorrect answer.
• A channel protein is an amino acid sequence that embeds in the cell membrane and creates a hydrophobic pathway for water and tiny, polar ions.
• Each channel protein, like other carrier proteins, has a size and structure that keeps all but the most particular molecules out.