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Question
Long Answer Question:
Justify the statement. If the answer is false, change the underlined word(s) to make the statement true
The DNA molecule is double-stranded and the RNA molecule is single-stranded.
Options
True
False
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Solution
True.
- The DNA is responsible for storing genetic information and also preserving it for the next generation of cells. Thus, it needs to be stable and resistant to enzymatic or oxidative alteration.
- The double-stranded DNA molecule is so designed that the part which stores the genetic information; the nitrogenous base pairs are stacked inward.
- Phosphate groups `("PO"_4^(-))` keep the base pairs safe inside form the backbone. DNA is further wrapped up around histone proteins into chromosomes which keep it condensed. This would not be possible if it were only single-stranded.
- RNA is not meant to last long and acts as a template carrying information which is copied from the DNA. Using protein-synthesizing machinery, it forms a protein. After which is disintegrates and digested.
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Long Answer Question:
Justify the statement. If the answer is false, change the underlined word(s) to make the statement true
Transcription must occur before translation may occur.
Describe the mechanism of translation with the help of neat and labelled diagram.
Identify the INCORRECT match.
Study the following sentences and select the correct option.
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- The reading frame beyond the point of insertion of three bases remains unaltered.
The mRNA AUGCAGAUACGC recognizes four amino acids and this character of the code referred to as ____________.
Which of the following is transcribed and then translated to form a protein product?
During the post transcriptional modification, ______ process does not occur.
Given below is a stretch of DNA showing the coding strand of a structural gene of a transcription unit?
5’-ATG ACC GTA TTT TCT GTA GTG CCC GTA CTT CAG GCA TAA-3’
- Write the corresponding template strand and the mRNA strand that will be transcribed, along with its polarity.
- If GUA of the transcribed mRNA is an intron, depict the sequence involved in the formation of mRNA/the mature processed hnRNA strand.
i. In a bacterium
ii. In humans - Upon translation, how many amino acids will the resulting polypeptide have? Justify.
