Name the bases present in RNA.which one of these is not present in DNA?

Question

Answer

Adenine , guanine, uracil and cytosine. are bases present in. RNA. uracil is not present in DNA

Answer

Bases present in RNA are adenine , uracil , cytosine and guanine . Uracil is not present in DNA .

Answer

Adenine, guanine, cytosine and Uracil are present in RNA. Uracil is not present in DNA , instead of it Thymine is present .

Answer

RNA contains Adenine, Guanine, Cytosine, Uracil.
Adenine forms 2 hydrogen bond with adjacent strand's Uracil. Cytosine forms 3 hydrogen bond with adjacent strand's Guanine.

DNA contains Adenine, Guanine, Cytosine, Thymine.
Adenine forms 2 hydrogen bond with adjacent strand's Thymine. Cytosine forms 3 hydrogen bond with adjacent strand's Guanine.
Uracil is present in RNA but absent in DNA

Answer

Adenine, guanine, cytosine and uracil are present in RNA while DNA have all these except uracil. In DNA, thymine (5- methyl uracil) is present instead of uracil.

Answer

Purine --> adenine , gaunine,  pyrimidine ---> cytosine and uracil. . in DNA uracil is absent and in place of the uracil thymine is present

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Set of five nitrogenous bases is used in the construction of nucleotides, which in turn build up nucleic acids like DNA and RNA. These nitrogenous bases are adenine (A), uracil (U), guanine (G), thymine (T), and cytosine (C).
RNA- A,U,G,C. BT DNA--A,T,G,C

Reason with explanation----DNA uses thymine instead of uracil because thymine has greater resistance to photochemical mutation, making the genetic message more stable. ... Outside of the nucleus, thymine is quickly destroyed. Uracil is resistant to oxidation and is used in the RNA that must exist outside of the nucleus.

Answer

RNA:-
Purines : adenine, guanine
Pyrimidines: cytosine,uracil

DNA:-
Purines : adenine, guanine
Pyrimidines: cytosine, thymine

Thus uracil is absent in DNA instead thymine is present

Answer

Bases Present in RNA:
RNA (ribonucleic acid) is a single-stranded nucleic acid molecule that plays a crucial role in various biological processes, including protein synthesis. It consists of four bases: adenine (A), cytosine (C), guanine (G), and uracil (U).

Adenine (A):
Adenine is a purine base that pairs with uracil in RNA through hydrogen bonding. It forms two hydrogen bonds with uracil, contributing to the stability of the RNA molecule.

Cytosine (C):
Cytosine is a pyrimidine base found in RNA. It forms three hydrogen bonds with guanine, establishing base-pairing rules similar to those in DNA.

Guanine (G):
Guanine is another purine base present in RNA. It forms three hydrogen bonds with cytosine, leading to the formation of stable base pairs.

Uracil (U):
Uracil is a pyrimidine base unique to RNA. It replaces thymine (T) found in DNA. Uracil pairs with adenine in RNA through hydrogen bonding.

Bases Not Present in DNA:
The four bases present in RNA are adenine (A), cytosine (C), guanine (G), and uracil (U). Among these, uracil is absent in DNA, where it is replaced by thymine (T). Thymine is a pyrimidine base that forms two hydrogen bonds with adenine in DNA.

Differences between Uracil and Thymine:
1. Structure: Uracil and thymine have similar structures, both being pyrimidine bases. However, thymine contains an additional methyl group (CH3) compared to uracil.

2. Presence in Nucleic Acids: Uracil is exclusively found in RNA, where it forms complementary base pairs with adenine. Thymine, on the other hand, is present in DNA, where it forms base pairs with adenine.

3. Conversion: During DNA replication, uracil is not directly converted into thymine. Instead, it arises from the deamination of cytosine, where cytosine is converted to uracil. Subsequently, uracil is recognized and replaced by thymine through DNA repair mechanisms.

4. Stability: Thymine is more stable than uracil due to the presence of the methyl group. The additional methyl group in thymine provides extra protection against chemical modifications and enhances the stability of the DNA molecule.

In conclusion, the base uracil is present in RNA but absent in DNA, where it is replaced by thymine. This difference in bases contributes to the distinct biological functions and properties of RNA and DNA.

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In DNA,we know that promotor and regulator sequences, introns and exons all are present but in RNA promotor and regulator seqences are present or not?

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