OBJECTIVE LIFE SCIENCE
CELL BIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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They have a nucleus.
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They have chlorophyll.
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They have mitochondria.
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They have ribosomes.
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Detailed explanation-1: -A nucleoid area, DNA and RNA serving as the cells’ genetic building blocks, ribosomes producing proteins, and a cytoplasm containing the cytoskeleton that arranges cellular components are all features of prokaryotic cells.
Detailed explanation-2: -All prokaryotes have chromosomal DNA localized in a nucleoid, ribosomes, a cell membrane, and a cell wall. The other structures shown are present in some, but not all, bacteria.
Detailed explanation-3: -Prokaryotes are unicellular organisms that lack membrane-bound cell organelles. Ribosomes are the organelles made up of proteins and RNA molecules called subunits. These are involved in protein synthesis. The prokaryotic ribosomes are of 70S type, unlike the eukaryotic ribosomes which are of 80S type.
Detailed explanation-4: -All prokaryotes have plasma membranes, cytoplasm, ribosomes, a cell wall, DNA, and lack membrane-bound organelles. Many also have polysaccharide capsules. Prokaryotic cells range in diameter from 0.1–5.0 µm.