NEET 2023
- Exam
- NEET
- Year
- 2023
- Subject
- Chemistry
- Chapter
- Biomolecules
NEET 2023 · Chemistry · Biomolecules
Given below are two statements : Statement I: A unit formed by the...
Given below are two statements :
Statement I: A unit formed by the attachment of a base to position of sugar is known as nucleoside
Statement II: When nucleoside is linked to phosphorous acid at -position of sugar moiety, we get nucleotide.
In the light of the above statements, choose the correct answer from the options given below:
Options
- AStatement I is false but Statement II is true.
- BBoth Statement I and Statement II are true.
- CBoth Statement I and Statement II are false.
- DStatement I is true but Statement II is false.
Correct answer
D. Statement I is true but Statement II is false.
Step-by-step solution
Nucleosides are the structural subunit of nucleic acids such as DNA and RNA. A nucleoside, composed of a nucleobase, is either a pyrimidine (cytosine, thymine or uracil) or a purine (adenine or guanine), a five carbon sugar which is either ribose or deoxyribose. The base connected to sugar at position. Nucleotides are building blocks of nucleic acids DNA and RNA. Nucleotides are composed of a nitrogenous base, a five-carbon sugar (ribose or deoxyribose), and at least one phosphate group. Thus, a nucleoside plus a phosphate group yields a nucleotide.