RNA differs from DNA with respect to the following

Options

A. type of base unit
B. type of sugar unit
C. type of H - bond
D. 1 and 2

Answer

To answer the question regarding how RNA differs from DNA, we can break it down into several key points:

### Step-by-Step Solution:

1. **Understanding the Structure of RNA and DNA**:
- RNA (Ribonucleic Acid) is a single-stranded molecule, while DNA (Deoxyribonucleic Acid) is double-stranded. This fundamental difference is important but not directly related to the options given in the question.

2. **Composition of Nucleotides**:
- Both RNA and DNA are made up of nucleotides, which consist of three components: a sugar, a phosphate group, and a nitrogenous base.

3. **Differences in Sugar**:
- The sugar in RNA is ribose, while the sugar in DNA is 2-deoxyribose. This is a significant difference because it affects the stability and function of the nucleic acids.

4. **Differences in Nitrogenous Bases**:
- RNA contains uracil (U) instead of thymine (T), which is found in DNA. The nitrogenous bases in RNA are adenine (A), guanine (G), cytosine (C), and uracil (U). In contrast, DNA contains adenine (A), guanine (G), cytosine (C), and thymine (T).

5. **Hydrogen Bonds**:
- The type of hydrogen bonds is not different between RNA and DNA. Both types of nucleic acids form hydrogen bonds between complementary bases (A-T in DNA and A-U in RNA).

6. **Conclusion**:
- Therefore, the differences between RNA and DNA can be summarized as:
- Type of sugar unit: RNA has ribose, while DNA has 2-deoxyribose.
- Type of base unit: RNA has uracil instead of thymine found in DNA.
- The correct answer to the question is that RNA differs from DNA in both the type of base unit and the type of sugar unit.

### Final Answer:
RNA differs from DNA with respect to:
- Type of base unit (uracil in RNA vs. thymine in DNA)
- Type of sugar unit (ribose in RNA vs. 2-deoxyribose in DNA)