PATHOLOGY

PATHOLOGY MCQ

IMMUNE RESPONSE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Prokaryotes are unlike all other organisms in that their cells
A
lack nucleus
B
have organelles
C
have cell walls
D
lack ncleic acids
Explanation: 

Detailed explanation-1: -Prokaryotes generally have cell walls and some organelles such as ribosomes. However, their unique feature is that they do not have. Since they do not have membrane-bound organelles, they also do not have nuclei. Prokaryotes still contain DNA that consists of nucleic acids, but they float freely in their cytoplasm.

Detailed explanation-2: -Prokaryotes are organisms whose cells lack a nucleus and other organelles. Prokaryotes are divided into two distinct groups: the bacteria and the archaea, which scientists believe have unique evolutionary lineages.

Detailed explanation-3: -Prokaryotes do not have a true nucleus but possess all other types of organelles.

Detailed explanation-4: -Unlike eukaryotes, prokaryotes have no membrane-bound organelles. This means that they lack a nucleus, mitochondria, and other advanced cell structures. All cells rely on protein components in order to function.

Detailed explanation-5: -The cell membrane is bound to DNA and is in close contact with the cytoplasm. There is no enclosing membrane, because there is no actual nucleus, but merely a concentration of DNA called a nucleoid. Therefore, prokaryotes can live without a nucleus.

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