Question 471 of 668
Which was the last human chromosome to be completely sequenced?
Chromosome 1 was finished last.
Molecular Basis of Inheritance MCQs
Class XII Biology • NCERT Based • NEET Practice
Question 472 of 668
Which of the following are the functions of RNA?
mRNA carries info, tRNA carries AAs, rRNA makes ribosomes.
Question 473 of 668
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
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
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
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
The RNA polymerase holoenzyme transcribes _______
The polymerase transcribes the structural gene; promoter/terminator regulate.
Question 478 of 668
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
The amino acid attaches to the tRNA at its _______
Amino acids bind to the 3' end.
Question 480 of 668
To initiate translation, the mRNA first binds to _______
mRNA binds to the small subunit first.