DNA Structure
DNA Structure is a Science & Technology concept from the MPSC syllabus, tested in 2 past MPSC questions (2014, 2024). Below are those real questions with their correct answers and explanations, plus the concepts worth being comfortable with first.
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डीएनयू मध्ये थायमीन हा नेहमी कुतल्या अमायनो ऑसिड शी जोडी बनवितो ? In DNA, thymine always pairs with ____________.
According to Chargaff's rules of DNA base pairing, Adenine (A) always pairs with Thymine (T) via two hydrogen bonds, and Cytosine (C) pairs with Guanine (G).
“डीएनए'' संरचनेच्या अनुषंगाने खालील चार विधानांपैकी दोन विधाने संयुक्तिक आहेत. संयुक्तिक विधानांची निवड करा. / With respect to structure of DNA, following four statements are made. Choose the two relevant statements.
(a)“डीएनए'' ची संरचना दोन लांब “न्यूक्लीओटाईड" च्या साखळ्यांनी बनली असून त्या एका सामान्य अक्षाभोवती गुंडाळलेल्या आहेत. / DNA is made of two long chains of nucleotides coiled in a helix around a central axis.
(b)“डीएनए'' ची संरचना दोन लांब “न्यूक्लीओसाईड" च्या लांब साखळीने बनलेली असून त्या एका सामान्य अक्षाभोवती गुंडाळलेल्या आहेत. / DNA is made of two long chains of nucleoside coiled around a central axis.
(c)या दोन साखळ्या एकमेकांशी अशा रीतीने पूरक आहेत की अॅडेनीन नेहमी थायमीन सोबत व सायटोसीन सोबत ग्वानीन सोबत जोडलेली आहेत. / The two chains are complimentary to each other so that Adenine is always paired with Thymine and cytosine with Guanine.
(d)या दोन साखळ्या एकमेकांशी पूरक नसून यामध्ये अॅडेनीन सोबत युरॅसील व सायटोसीन सोबत ग्वानीन जोडलेले आहेत. / The two chains are not complimentary to each other where Adenine is paired with uracil and cytosine with Guanine.
DNA consists of two nucleotide chains coiled in a double helix (statement a) and exhibits specific base pairing where Adenine pairs with Thymine and Cytosine with Guanine (statement c).