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668 questions in this collection · Page 48 of 67
Question 471 of 668
📘 CLASS XII
Molecular Basis Of Inheritance
Which was the last human chromosome to be completely sequenced?
Chromosome 1 was finished last.
Question 472 of 668
📘 CLASS XII
Molecular Basis Of Inheritance
Which of the following are the functions of RNA?
mRNA carries info, tRNA carries AAs, rRNA makes ribosomes.
Question 473 of 668
📘 CLASS XII
Molecular Basis Of Inheritance
While analyzing the DNA of an organism, a total number of 5386 nucleotides were found out of which the proportion of different bases were: Adenine = 29%, Guanine = 17%, Cytosine = 32%, Thymine = 17%. Considering the Chargaff's rule it can be concluded that _______
A!=T and G!=C, so it must be single stranded.
Question 474 of 668
📘 CLASS XII
Molecular Basis Of Inheritance
In some viruses, DNA is synthesized by using RNA as template. Such a DNA is called _______
Complementary DNA (cDNA) is made from RNA.
Question 475 of 668
📘 CLASS XII
Molecular Basis Of Inheritance
If Meselson and Stahl's experiment is continued for four generations in bacteria, the ratio of N15/N15 : N15/N14 : N14/N14 containing DNA in the fourth generation would be _______
After 4 generations: 0 heavy, 2 hybrid, 14 light. Ratio 0:1:7.
Question 476 of 668
📘 CLASS XII
Molecular Basis Of Inheritance
If the sequence of nitrogen bases of the coding strand of DNA in a transcription unit is: 5' - A T G A A T G - 3', the sequence of bases in its RNA transcript would be _______
Coding strand is same as RNA (T becomes U).
Question 477 of 668
📘 CLASS XII
Molecular Basis Of Inheritance
The RNA polymerase holoenzyme transcribes _______
The polymerase transcribes the structural gene; promoter/terminator regulate.
Question 478 of 668
📘 CLASS XII
Molecular Basis Of Inheritance
If the base sequence of a codon in mRNA is 5' - AUG - 3', the sequence of tRNA pairing with it must be _______
Anticodon is antiparallel. AUG -> CAU (reading 5'->3'). 3' UAC 5' = 5' CAU 3'.
Question 479 of 668
📘 CLASS XII
Molecular Basis Of Inheritance
The amino acid attaches to the tRNA at its _______
Amino acids bind to the 3' end.
Question 480 of 668
📘 CLASS XII
Molecular Basis Of Inheritance
To initiate translation, the mRNA first binds to _______