LIFE SCIENCE

OBJECTIVE LIFE SCIENCE

CELL BIOLOGY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which structures are found in every living cell?
A
cell membrane and cytoplasm
B
chloroplasts and mitochondria
C
a cell wall and nucleus
D
chloroplasts and cell wall
Explanation: 

Detailed explanation-1: -A cell consists of three parts: the cell membrane, the nucleus, and, between the two, the cytoplasm. Within the cytoplasm lie intricate arrangements of fine fibers and hundreds or even thousands of miniscule but distinct structures called organelles.

Detailed explanation-2: -Every cell contains a cytoplasm which is filled with cytosol. Cytosol forms 70% of a cells volume and provides a medium or platform in which organelles and other cellular structures can operate in.

Detailed explanation-3: -In eukaryotic cells, which have a nucleus, the cytoplasm is everything between the plasma membrane and the nuclear envelope. In prokaryotes, which lack a nucleus, cytoplasm simply means everything found inside the plasma membrane.

Detailed explanation-4: -It is mainly composed of water, salts, and proteins. In eukaryotic cells, the cytoplasm includes all of the material inside the cell and outside of the nucleus. All of the organelles in eukaryotic cells, such as the nucleus, endoplasmic reticulum, and mitochondria, are located in the cytoplasm.

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