Question: What Functional Group Is At The 3 End Of The DNA?

Is the leading strand 3 to 5?

Leading Strand and Lagging Strand The first one is called the leading strand.

This is the parent strand of DNA which runs in the 3′ to 5′ direction toward the fork, and it’s able to be replicated continuously by DNA polymerase.

The other strand is called the lagging strand..


Ribonucleic acid (RNA) is a molecule similar to DNA. Unlike DNA, RNA is single-stranded. An RNA strand has a backbone made of alternating sugar (ribose) and phosphate groups.

What is the structural difference between the 3 and 5 end of a DNA strand?

The 3′ and 5′ ends have different chemical structures. The 5′ end is “capped” by a phosphate group, and the 3′ end is “capped” by a hydroxyl group.

What is the difference between DNA and RNA virus?

DNA viruses contain usually double‐stranded DNA (dsDNA) and rarely single‐stranded DNA (ssDNA). These viruses replicate using DNA‐dependent DNA polymerase. … Compared to DNA virus genomes, which can encode up to hundreds of viral proteins, RNA viruses have smaller genomes that usually encode only a few proteins.

Where is RNA located?

There are two types of nucleic acids which are polymers found in all living cells. Deoxyribonucleic Acid (DNA) is found mainly in the nucleus of the cell, while Ribonucleic Acid (RNA) is found mainly in the cytoplasm of the cell although it is usually synthesized in the nucleus.

What are the functional groups of DNA?

The functional groups are amine, amide, hydroxyl, glycoside linkage, and phosphodiester.

What are the 3 differences from DNA?

So, the three main structural differences between RNA and DNA are as follows:RNA is single-stranded while DNA is double-stranded.RNA contains uracil while DNA contains thymine.RNA has the sugar ribose while DNA has the sugar deoxyribose.

Do you read DNA from 5 to 3?

5′ – 3′ direction refers to the orientation of nucleotides of a single strand of DNA or RNA. … DNA is always read in the 5′ to 3′ direction, and hence you would start reading from the free phosphate and finish at the free hydroxyl group.

Which structure is on the 3 end?

The 3′-end (three prime end) of a strand is so named due to it terminating at the hydroxyl group of the third carbon in the sugar-ring, and is known as the tail end.

What is at the 3 end of DNA?

Each DNA strand has two ends. The 5′ end of the DNA is the one with the terminal phosphate group on the 5′ carbon of the deoxyribose; the 3′ end is the one with a terminal hydroxyl (OH) group on the deoxyribose of the 3′ carbon of the deoxyribose.

Does DNA have a 5 carbon sugar?

A single basic unit or “building block” of DNA consists of a sugar , a phosphate group and a base. Sugars are rings of carbon and oxygen atoms. The sugar in DNA has 5 carbon atoms (labelled 1′ – 5′), and is called deoxy-ribose (hence the “Deoxy-ribo” in DNA).

Is carboxyl a DNA?

Properties of Functional Groups Some of the important functional groups in biological molecules include: hydroxyl, methyl, carbonyl, carboxyl, amino, phosphate, and sulfhydryl groups. These groups play an important role in the formation of molecules like DNA, proteins, carbohydrates, and lipids.

What does 3 and 5 DNA mean?

The 5′ and 3′ mean “five prime” and “three prime”, which indicate the carbon numbers in the DNA’s sugar backbone. The 5′ carbon has a phosphate group attached to it and the 3′ carbon a hydroxyl (-OH) group. This asymmetry gives a DNA strand a “direction”.

What functional groups affect genes?

Methyl groups can affect gene expression and are written –CH3. Hydroxyl is always polar. Carbonyl determines the two groups of sugars. Carboxyl has acidic properties and a carboxyl group is written –COOH.

How do you determine 5 and 3 ends of DNA?

Each end of DNA molecule has a number. One end is referred to as 5′ (five prime) and the other end is referred to as 3′ (three prime). The 5′ and 3′ designations refer to the number of carbon atom in a deoxyribose sugar molecule to which a phosphate group bonds.

What do 5 prime and 3 prime mean?

A key feature of all nucleic acids is that they have two distinctive ends: the 5′ (5-prime) and 3′ (3-prime) ends. This terminology refers to the 5′ and 3′ carbons on the sugar. For both DNA (shown above) and RNA, the 5′ end bears a phosphate, and the 3′ end a hydroxyl group.

Why does DNA polymerase go from 5 to 3?

DNA replication goes in the 5′ to 3′ direction because DNA polymerase acts on the 3′-OH of the existing strand for adding free nucleotides.

Is RNA synthesized 5 to 3?

RNA growth is always in the 5′ → 3′ direction: in other words, nucleotides are always added at a 3′ growing tip, as shown in Figure 10-6b. Because of the antiparallel nature of the nucleotide pairing, the fact that RNA is synthesized 5′ → 3′ means that the template strand must be oriented 3′ → 5′.