LIFE SCIENCE

OBJECTIVE LIFE SCIENCE

CELL BIOLOGY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which is significantly smaller in size?
A
Prokaryote
B
Eukaryote
C
both the same
D
None of the above
Explanation: 

Detailed explanation-1: -Cell size. Typical prokaryotic cells range from 0.1 to 5.0 micrometers (m) in diameter and are significantly smaller than eukaryotic cells, which usually have diameters ranging from 10 to 100 m.

Detailed explanation-2: -Mycoplasma is the smallest prokaryotic organism (0.15 to 0.35 micrometer) that lacks cell wall but have rigid plasma membrane rich in sterols and lipoglycans.

Detailed explanation-3: -Prokaryotes are single-celled organisms belonging to the domains Bacteria and Archaea. Prokaryotic cells are much smaller than eukaryotic cells, have no nucleus, and lack organelles. All prokaryotic cells are encased by a cell wall. Many also have a capsule or slime layer made of polysaccharide.

Detailed explanation-4: -Additionally, eukaryotic cells are more than 100 to 10, 000 times larger than prokaryotic cells and are much more complex. The DNA in eukaryotes is stored within the nucleus, while DNA is stored in the cytoplasm of prokaryotes.

Detailed explanation-5: -At 0.1 to 5.0 m in diameter, prokaryotic cells are significantly smaller than eukaryotic cells, which have diameters ranging from 10 to 100 m (Figure 1.3. 2). The small size of prokaryotes allows ions and organic molecules that enter them to quickly diffuse to other parts of the cell.

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