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Transfer RNA (tRNA) is a single strand that loops back on itself.
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∙ 11y ago
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Can mRNA be a double strand?
In a strict sense no. mRNA always consists of a single RNA strand. In another sense, yes. Nuclei acids are inherently unstable in a single stranded state - the nitrogenous bases will spontaneously basepair with any nucleotides they encounter. As a result, most RNAs will spontaneously fold back on themselves, the single RNA strand basepairing with other regions of itself. That said, because the sequence will never be perfectly complementary, it's unlikely that much of the mRNA will be double stranded, but it will probably have a few segments with a double stranded character.
How many strands is RNA made of?
in humans there is one strand of RNA, hence the name single-stranded RNA. However, in some viruses (such as HIV), there are double-stranded RNA made by the enzyme transcriptase.
What is lagging strand in replication of DNA?
The two strands of DNA in animal cells are arranged backwards to each other - the start of one is paired with the ending of the other. However, the enzyme that replicates DNA (DNA polymerase) can only work from start to finish. On one strand, DNA polymerase can work front to back in a continuous chain - the strand that allows this is called the leading strand because it "leads" in completion status. On the other strand, the DNA polymerase has to work backwards in pieces and then put the pieces back together into a single chain - the strand that causes this is called the lagging strand because it "lags behind" the other in completion status.
What is DNA sense?
The plus strand is the same as the sense strand and can also be called the coding or non-template strand. This is the strand that has the same sequence as the mRNA (except it has Ts instead of Us). The other strand, called the template, minus, or antisense strand, is complementary to the mRNA. Gotta love the use of 4 names to describe the same thing. Ah science, why do you torment us?
What does the job of unwinding copying and rewinding DNA inside a cell?
the enzyme helicase unwinds DNA, then DNA rewinds itself back up after translation has finished.
Can mRNA be a double strand?
In a strict sense no. mRNA always consists of a single RNA strand. In another sense, yes. Nuclei acids are inherently unstable in a single stranded state - the nitrogenous bases will spontaneously basepair with any nucleotides they encounter. As a result, most RNAs will spontaneously fold back on themselves, the single RNA strand basepairing with other regions of itself. That said, because the sequence will never be perfectly complementary, it's unlikely that much of the mRNA will be double stranded, but it will probably have a few segments with a double stranded character.
How many strands is RNA made of?
in humans there is one strand of RNA, hence the name single-stranded RNA. However, in some viruses (such as HIV), there are double-stranded RNA made by the enzyme transcriptase.
How do you knit a knot?
There are many different variations on knot-type stitches. Probably the simplest would be to pull five loops from a single stitch, the knit those five stitches back together. You can pull multiple loops in a stitch by inserting the needle through the front of the stitch (front-to-back) and pulling a loop, then from the back-to-the-front and pulling a second loop, and so on until you've pulled five loops. Insert the left needle into all five loops at once, and in front of the right need. Now with both needles through all five loops, knit the five loops together. One knotted stitch made.
How do you know if you have 'good hair'?
Take a single strand of your hair and hold it between thumb and forefinger in both hands. slightly, gently stretch the hair strand back and forth and if it flexes without breaking then you have good strong hair.
What is a description of how to do k2togtbl and p2togtbl for knitting a sweater?
Knit two together through the back loops and Purl two together through the back loops
Which is oldest Froot Loops or Trix?
Trix, which was introduced back in 1954, whereas Froot Loops were introduced in 1966.
Why are the loops on the back my shirt?
Loops were put on shirts to enable them to be hung on a hook. Over time, they became part of the style of the shirt.
What allows the old strand and the new strand to come back together?
The highly generalized process called Recombination.
Is RNA found in a double stranded state in the cyoplasm?
It depends what you mean by double stranded. If you mean two separate RNA strands, perfectly complementary to one another and existing as a basepaired structure in the cytoplasm, then no. Double stranded RNA like that only occurs in some types of viruses (and cells infected by them... so I guess the cytoplasm of a cell infected by a double stranded virus might have a lot of this kind of double stranded RNA). However, if you mean double stranded in the sense of a single RNA molecule folding back on itself and basepairing with itself - forming stem loops and more complicated structures - that kind of RNA double-strandedness is extremely common. All tRNA's and rRNA's for example exhibit this kind of double-strandedness. Nucleic acids are unstable in single stranded states and will spontaneously fold back on themselves if there is no other strand to basepair with. Nucleic acids are inherently unstable in a single stranded state. Thus,
What holds DNA strands apart during replication?
What prevents the wrong nucleotide from being added to the new strand during DNA replication? DNA polymerase 3 and DNA polymerase 1 can become what is known as exonucleases. an exonuclease can go back and "proofread" the replicated DNA and if there is a mistake, then everything beyond that incorrect nucleotide is removed and the DNA polymerase 3 will re-replicate from the bad point on. the protein p53 holds the cell in the G1 and S phase of replication which allows more time for proof reading the replicated DNA
Where to attach buttons for suspenders?
Centered on the waistband, front and back, and centered on the center seam in the back, then about a hand-width from the fly on the front. If there are belt loops, either side of the back center loop, and either side of the frontmost loops.
How do you buckle a belt with two loops?
Buckling a belt with 2 loops is actually quite simple. Just run the open end through the 2 loops and bring it back around through the second loop.
