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Why is RNA only synthesized from one strand of a double-stranded DNA helix?
Wiki User
∙ 14y ago
Not sure but I'm going to make an educated guess, your DNA doesn't want to leave the nucleus so it stays protected, your RNA is a translator and messenger it already has the 1 strand that can cooperate with the DNA so it can copy it exactly and then translate it.
Wiki User
∙ 14y ago
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What is major difference between normal DNA helix and RNA helix?
DNA is double stranded while RNA only has one strand.
How many colors are in a DNA strand?
If you see a DNA strand with colors on it, it is only for visual purposes and is just a model. On the molecular level, there are no clear color-coordinated divisions between groups on the double helix.
How do you find a complimentry strand of DNA?
DNA usually comes in a double stranded helix, but if there is only one strand provided, complimentary base pairing occurs. Adenine and Thymine pair, as do Guanine and Cytosine. Given a sequence of DNA, using this, you can find its complementary strand.
If DNA is described as a double helix how should mRNA be described-?
mRNA is like a single strand instead of a double strand. If DNA is like a twisted ladder, then mRNA is like a single half of that ladder, with only half the bases.
How are the strands held together in the double helix?
On a single strand of DNA the nucleotides are held together by covalent bonding between the phosphate group bonded to the 5' end of the deoxyribose, which bonds to another deoxyribose molecule attached to the next nucleotide on the strand at the 3' end of the sugar. This is what holds together a single strand. When two strands of DNA that have exactly complementary base pairing (Adenine bonds with only Thymine, and Cytosine with Guanine) the base forms a hydrogen bond to the base on the opposite strand, only if the base pairing is complementary. So, in short the double helix form is held together by hydrogen bonds between the bases present on the strand.
What is major difference between normal DNA helix and RNA helix?
DNA is double stranded while RNA only has one strand.
Why can't you see the double helix Dna strand?
Only because it is invisible to the 'naked' eye.
Which of the following statements best explains why the leading and lagging strands are synthesized using two different mechanisms?
The leading strand is created continuously, but the lagging strand is created as small fragments, known as Okazaki fragments. These fragments are later joined together to form one complete strand.
How many colors are in a DNA strand?
If you see a DNA strand with colors on it, it is only for visual purposes and is just a model. On the molecular level, there are no clear color-coordinated divisions between groups on the double helix.
How do you find a complimentry strand of DNA?
DNA usually comes in a double stranded helix, but if there is only one strand provided, complimentary base pairing occurs. Adenine and Thymine pair, as do Guanine and Cytosine. Given a sequence of DNA, using this, you can find its complementary strand.
What okazaki fragments are?
In DNA replication, the two DNA strands acting as templates need to be synthesized simultaneously. DNA polymerase is an enzyme which can synthesize the DNA only in 5' to 3' direction.the two template strands are anti-parallel to each other and their complementary strands are synthesized in different direction. In one of the strand DNA is synthesized continuously by adding nucleotides at 3'-OH end. this is referred as 'leading strand' synthesis. the other strand to be synthesized is replicated in short fragments referred 'Okazaki fragments' named after their discoverer Reiji Okazaki.
If DNA is described as a double helix how should mRNA be described-?
mRNA is like a single strand instead of a double strand. If DNA is like a twisted ladder, then mRNA is like a single half of that ladder, with only half the bases.
How are the strands held together in the double helix?
On a single strand of DNA the nucleotides are held together by covalent bonding between the phosphate group bonded to the 5' end of the deoxyribose, which bonds to another deoxyribose molecule attached to the next nucleotide on the strand at the 3' end of the sugar. This is what holds together a single strand. When two strands of DNA that have exactly complementary base pairing (Adenine bonds with only Thymine, and Cytosine with Guanine) the base forms a hydrogen bond to the base on the opposite strand, only if the base pairing is complementary. So, in short the double helix form is held together by hydrogen bonds between the bases present on the strand.
What is a double helix DNA or RNA?
Both DNA and RNA can exist in the double helix form, but only DNA is completely stable as a double helix. The double helix RNA is usually only short "hairpin" sections folding back on itself, never the long essentially linear form of double helix DNA.
Are gamma globulin's are synthesized inside bone marrow?
They are the only plasma proteins that are not synthesized in liver, but are synthesized in lymph nodes .
Why is DNA replication called a semi-conservative operation?
DNA replication is called a semi-conservative operation because during the process, the two strands of the DNA molecule separate, and each strand serves as a template for the synthesis of a new complementary strand. As a result, each newly replicated DNA molecule consists of one strand that is the original template and one strand that is the newly synthesized strand. This ensures that the genetic information is conserved and passed on to the daughter cells during cell division.
What is an end replication problem?
The two strands of a DNA molecule are antiparallel to one another (the backbone of one strand runs from 5'-3' while the complimentary strand runs 3'-5'). Unfortunately, DNA polymerase, the enzyme responsible for replicating DNA, can only make DNA in a 5'-3' direction (and read DNA in the 3'-5' direction). Also, it needs a "primer" to give it a place to bind and start replication. So this creates a problem when synthesizing the 3'-5' stand because your enzyme will only synthesize 5'-3'. During replication this is solved by synthesizing small pieces of DNA ahead of the replication fork on the 5'-3' mother strand. Thus we have one daughter strand which is synthesized as a continuous piece of DNA (called the leading strand) and one daughter strand which is synthesized in small, discontinuous pieces (called the lagging strand). However, at the extreme end of the DNA, we run into another problem. The leading stand can be made to the very end, but the lagging strand cannot because you need the RNA primer upstream to begin each piece of the lagging strand DNA but at the end of the DNA there is nothing for this piece to attach to. Thus, the last section of the lagging strand cannot be synthesized and after several rounds of DNA replication, the DNA molecule gets smaller and smaller. This is "the end of replication problem" and it is solved by putting a DNA cap on the ends of DNA called a telomere which does not code for any protein, thus when this information is lost it does not have severe consequences for the cell.
