Atom of the base or sugar that forms a bond in a nucleoside or nucleotide

This type of question, asked 5 times: May 2022 S1, 2 May 2023 S2, 3 May 2023 S2, 26 Apr 2025 S2, 17 Apr 2026 S1. All 5 questions below, oldest first.

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Question 1
May 2022 S1
76 $Which nitrogen atom of pyrimidine base numbered from 1 to 6 is bonded with furanose sugar?$
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Question 2
2 May 2023 S2
57 $1'$
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Question 3
3 May 2023 S2
69 $Which 'C' atom of ribose sugar (numbered from 1' to 5') bonds with phosphate group to form AMP?$
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Question 4
26 Apr 2025 S2
59 $C_{1}^{'}$
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Question 5
17 Apr 2026 S1
46 $Which carbon atom (numbered from 1' to 5') of ribose lacks the oxygen to form deoxyribose ?$
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Question 1