4th December 2019

drawittoknowit

17

What is not found in DNA?

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Uracil. Uracil is present in RNA and binds to adenine whereas thymine is present in DNA and binds to adenine.

Besides, what is the part of the molecule for which DNA is named?

1 — Phosphate groups which are negatively charged and give DNA molecules a negative charge. 2 — A 5 carbon sugar, deoxyribose (hence the name deoxyribonucleic acid). There are two sugars found in nucleic acids; ribose is found in RNA (ribonucleic acid) and deoxyribose in DNA.

What bases are found in a DNA molecule?

The four bases found in DNA are adenine (A), cytosine (C), guanine (G) and thymine (T). These four bases are attached to the sugar-phosphate to form the complete nucleotide, as shown for adenosine monophosphate. Adenine pairs with thymine and guanine pairs with cytosine.

Which is not a nitrogenous base in DNA?

Cytosine is found in both DNA and RNA, but thymine is only found in DNA and URACIL is only found in RNA. Uracil is the Base found only in RNA. There are 4 nitrogenous bases found in nucleic acids (DNA & RNA) viz Adenine, Guanine, Cytosine & Thymine, Of this Thymine is replaced by Uracil in RNA.

1

What is found in DNA?

Most DNA is located in the cell nucleus (where it is called nuclear DNA), but a small amount of DNA can also be found in the mitochondria (where it is called mitochondrial DNA or mtDNA). The information in DNA is stored as a code made up of four chemical bases: adenine (A), guanine (G), cytosine (C), and thymine (T).

2

What is found in a DNA molecule?

DNA is made up of molecules called nucleotides. Each nucleotide contains a phosphate group, a sugar group and a nitrogen base. The four types of nitrogen bases are adenine (A), thymine (T), guanine (G) and cytosine (C). The order of these bases is what determines DNA's instructions, or genetic code.

3

What is the key difference between DNA and RNA?

DNA is a long polymer with deoxyriboses and phosphate backbone. Having four different nitrogenous bases: adenine, guanine, cytosine and thymine. RNA is a polymer with a ribose and phosphate backbone. Four different nitrogenous bases: adenine, guanine, cytosine, and uracil.

4

Are amino acids in DNA?

DNA is composed of nucleotides, which contain a ribose sugar, a nitrogenous base, and phosphate. DNA does encode the information to make proteins, and so specifies amino acids. DNA and RNA are entirely made out of nucleotides.

5

Which scientist did not help determine the structure of DNA?

Concept 19 The DNA molecule is shaped like a twisted ladder. James Watson and Francis Crick solved the structure of DNA. Other scientists, like Rosalind Franklin and Maurice Wilkins, also contributed to this discovery.

6

Which nitrogenous bases are found in DNA?

Nitrogenous base: A molecule that contains nitrogen and has the chemical properties of a base. The nitrogenous bases in DNA are adenine (A), guanine (G), thymine (T), and cytosine (C). The nitrogenous bases in RNA are the same, with one exception: adenine (A), guanine (G), uracil (U), and cytosine (C).

7

Is uracil in DNA?

The others are adenine (A), cytosine (C), and guanine (G). In RNA, uracil binds to adenine via two hydrogen bonds. In DNA, the uracil nucleobase is replaced by thymine. Uracil is a demethylated form of thymine.

8

Which molecule has the Anticodons?

tRNA

9

How many different bases are associated with the makeup of DNA?

Name the four bases associated with DNA. How are these bases paired on the DNA molecules? the four bases associated with DNA are adenine (A) thymine (T) Guanine (G) Cytosine (C) adenine is paired with thymine and guanine is paired with cytosine.

10

What is the first step in protein synthesis called?

Steps in Protein Synthesis: STEP 1: The first step in protein synthesis is the transcription of mRNA from a DNA gene in the nucleus. At some other prior time, the various other types of RNA have been synthesized using the appropriate DNA. The RNAs migrate from the nucleus into the cytoplasm.

11

What is a structural difference between DNA and RNA?

Structurally, DNA and RNA are nearly identical. As mentioned earlier, however, there are three fundamental differences that account for the very different functions of the two molecules. RNA has a ribose sugar instead of a deoxyribose sugar like DNA. RNA nucleotides have a uracil base instead of thymine.

12

What nitrogenous bases are correctly paired in DNA?

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

13

How does the sugar found in DNA differ from that found in RNA?

Deoxyribose is the same as ribose, except that the former has one more OH. DNA and RNA is the sugar, with 2-deoxyribose being replaced by the alternative pentose sugar ribose in RNA. The four bases found in DNA are adenine (abbreviated A), cytosine (C), guanine (G) and thymine (T).

14

What kind of sugar is deoxyribose?

The 5-carbon sugars ribose and deoxyribose are important components of nucleotides, and are found in RNA and DNA, respectively. The sugars found in nucleic acids are pentose sugars; a pentose sugar has five carbon atoms. A combination of a base and a sugar is called a nucleoside.

15

Which is not a component of a nucleotide?

There are only three components to a nucleotide: A sugar (called deoxyribose) A Phosphate (1 phosphorus atom joined to 4 oxygen atoms) One of 4 bases (Adenine, Guanine, Cytosine, Thymine)

16

What brings the correct amino acids to the ribosome?

Messenger RNA (mRNA) molecules carry the coding sequences for protein synthesis and are called transcripts; ribosomal RNA (rRNA) molecules form the core of a cell's ribosomes (the structures in which protein synthesis takes place); and transfer RNA (tRNA) molecules carry amino acids to the ribosomes during protein

17

How many nucleotides is one codon?

The nucleotide triplet that encodes an amino acid is called a codon. Each group of three nucleotides encodes one amino acid. Since there are 64 combinations of 4 nucleotides taken three at a time and only 20 amino acids, the code is degenerate (more than one codon per amino acid, in most cases).

18

What is not part of the nucleotide structure?

Which of the following is not part of a nucleotide? a. a nitrogenous base b. a phosphate group c. a sulfhydryl group d. a five-carbon sugar Answer C. Nucleotides have three components: the 5-carbon ribose or deoxyribose sugar, the phosphate groups attached to the suger, and the nitrogenous base (ATGC).

19

What are the three main parts of a nucleotide?

Both deoxyribonucleic acid (DNA) and ribonucleic acid (RNA) are made up of nucleotides which consist of three parts:

Nitrogenous Base. Purines and pyrimidines are the two categories of nitrogenous bases.
Pentose Sugar. In DNA, the sugar is 2'-deoxyribose.
Phosphate Group. A single phosphate group is PO₄³^-.

20

What is a nucleotide made of?

Nucleotides are the building blocks of nucleic acids; they are composed of three subunit molecules: a nitrogenous base, a five-carbon sugar (ribose or deoxyribose), and at least one phosphate group. They are also known as phosphate nucleotides. A nucleoside is a nitrogenous base and a 5-carbon sugar.

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