MHT CET 202621 AprilEvening Shift
- Exam
- MHT CET
- Year
- 2026
- Date
- 21 April
- Shift
- Evening Shift
- Subject
- Biology
- Chapter
- Evolution
MHT CET 2026 · 21 April · Evening Shift · Biology · Evolution
Arrange the following steps of the Oparin-- Haldane theory in...
Arrange the following steps of the Oparin-- Haldane theory in proper order and choose the correct option:
(A). Formation of first cell
(B). Origin of earth and primitive atmosphere
(C). Formation of complex organic molecules
(D). Formation of protobionts
Choose the correct answer from the options given below:
(A). Formation of first cell
(B). Origin of earth and primitive atmosphere
(C). Formation of complex organic molecules
(D). Formation of protobionts
Choose the correct answer from the options given below:
Options
- A(A), (B), (C), (D)
- B(B), (C), (D), (A)
- C(B), (C), (A), (D).
- D(B), (D), (C), (A)
Correct answer
B. (B), (C), (D), (A)
Step-by-step solution
According to the Oparin-Haldane theory of chemical evolution, the sequence of events that led to the origin of life is as follows:
First, the origin of the earth and its primitive reducing atmosphere occurred.
Second, simple inorganic molecules reacted to form simple organic molecules, which then polymerized to form complex organic molecules such as proteins and nucleic acids.
Third, these complex organic molecules aggregated together to form protobionts (like coacervates and microspheres), which were non-cellular structures that exhibited some properties of life.
Finally, the protobionts evolved into the first true living cells.
Therefore, the correct sequence is (B), (C), (D), (A).
Answer: (B), (C), (D), (A)
First, the origin of the earth and its primitive reducing atmosphere occurred.
Second, simple inorganic molecules reacted to form simple organic molecules, which then polymerized to form complex organic molecules such as proteins and nucleic acids.
Third, these complex organic molecules aggregated together to form protobionts (like coacervates and microspheres), which were non-cellular structures that exhibited some properties of life.
Finally, the protobionts evolved into the first true living cells.
Therefore, the correct sequence is (B), (C), (D), (A).
Answer: (B), (C), (D), (A)