EVERYDAY SCIENCE

SCIENCE

VIRUS AND BACTERIA

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Prokaryotes are cells which DO NOT contain a
A
nucleus
B
flagella
C
ribosome
D
cytoplasm
Explanation: 

Detailed explanation-1: -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. Most prokaryotes are small, single-celled organisms that have a relatively simple structure.

Detailed explanation-2: -The prokaryotic cell’s genetic material is located in an area with an irregular form called a nucleoid, which is a nucleus-like structure. Prokaryotic cells lack a true nucleus. The nucleus is devoid of the nuclear membrane.

Detailed explanation-3: -Prokaryotes (meaning ‘before nucleus’) are cells without a definite nucleus. The DNA floats in the cytoplasm and they divide through mitosis. RBC and platelets present in eukaryotes also do not have the nucleus.

Detailed explanation-4: -Prokaryotic cells do not have a nucleus. All cells can are classified as prokaryotic or eukaryotic based on their internal structure. Eukaryotic cells contain a nucleus-a structure enclosed in a membrane that contains the majority of the cell’s genetic material. Prokaryotic cells lack nuclei.

Detailed explanation-5: -The prokaryotic cells lack a nucleus, membrane-bounded cell organelles (like chloroplast, mitochondria, ER, Golgi bodies, etc.) The respiratory enzymes are present in the cell membrane.

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