Gentics And Evoloution - Study Mode

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[#346] The first step in protein synthesis, in prokaryotes, is the formation of

(A) 45 S initiation complex

(B) 30 S initiation complex

(C) 60 S initiation complex

(D) None of the above

Correct Answer

(B) 30 S initiation complex

[#347] Consider the following statements regarding the theory of linkage and choose the correct answer: 1. Genes are arranged in a linear fashion in the chromosomes 2. Genes that show linkage are situated in the chromosome 3. Linked genes remain in their original combination during the course of inheritance 4. The genes which are widely separated show strong linkage, while those closely located, have more chances to get separated by crossing over

(A) Only 1, 2 and 3 are true

(B) Only 2, 3 and 4 are true

(C) Only 1, 3 and 4 are true

(D) Only 3 and 4 are true

Correct Answer

(A) Only 1, 2 and 3 are true

[#348] Which of the following is not a Mendelian disorder?

(A) Turner's syndrome

(B) Haemophilia

(C) Phenylketonuria

(D) Sickle-cell anaemia

Correct Answer

(A) Turner's syndrome

[#349] Failure of segregation of chromatid during cell division cycle results in the gain or loss of chromosome which is called

(A) aneuploidy

(B) hypopolyploidy

(C) hyperpolyploidy

(D) polyploidy

Correct Answer

(A) aneuploidy

[#350] Who among the following showed that the animal and vegetable broths boiled for several hours and immediately sealed were never infested with microorganisms and disproved the spontaneous generation of microorganisms?

(A) Redi (1680)

(B) Spallanzani (1765)

(C) Pasteur (1864)

(D) Harvey (1650)

Correct Answer

(B) Spallanzani (1765)