What Is DNA In A Sentence? Meaning: [ˌdiːenˈeɪ] n. (biochemistry) a long linear polymer found in the nucleus of a cell and formed from nucleotides and shaped like a double helix; associated with the transmission of genetic information. … 3) DNA is stored in the nucleus of a cell. 4) DNA decides what we are,
Where Does Transcription Take Place And What Happens? Transcription takes place in the nucleus. It uses DNA as a template to make an RNA molecule. RNA then leaves the nucleus and goes to a ribosome in the cytoplasm, where translation occurs. Translation reads the genetic code in mRNA and makes a protein. What happens in
Does MRNA Determine Amino Acid Sequence? During translation, ribosomes move along an mRNA strand, and with the help of proteins called initiation factors, elongation factors, and release factors, they assemble the sequence of amino acids indicated by the mRNA, thereby forming a protein. Do you use mRNA or DNA to find amino acids? The cell’s
Why Do We Need Single Stranded DNA? All organisms must replicate their DNA when cells divide. During DNA replication, an enzyme called helicase unwinds the dsDNA and opens a replication fork where the two strands of parental DNA are separated. Single-strand binding proteins bind to the two strands to prevent them from reannealing. Is single
Why Can’t The Ends Of DNA Be Replicated? The end-replication problem states that small stretches of DNA at the 3′ ends of chromosomes cannot be copied because these stretches are not covered by Okazaki fragments. Because of the end-replication problem, chromosome ends are slowly shortened over time. Which ends could not be replicated by DNA
Is The Leading Strand Synthesized 5 To 3? At a replication fork, both strands are synthesized in a 5′ → 3′ direction. The leading strand is synthesized continuously, whereas the lagging strand is synthesized in short pieces termed Okazaki fragments. What is the leading and lagging strand in DNA replication? During DNA replication, one new
How Many Nucleotides Does An Amino Acid Have? Three nucleotides encode an amino acid. Why are there 3 nucleotides in a 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
What Is The Twisted Ladder Shape Of The DNA Molecule? Double helix is the description of the structure of a DNA molecule. A DNA molecule consists of two strands that wind around each other like a twisted ladder. What is the twisted shape of a DNA molecule called? The double helix is a description of
How Many Replication Forks Do Bacteria Cells Usually Have? Two replication forks are formed by the opening of the double-stranded DNA at the origin, and helicase separates the DNA strands, which are coated by single-stranded binding proteins to keep the strands separated. DNA replication occurs in both directions. How many replication forks are there? DNA
What Is DNA-dependent DNA Polymerase? DNA-dependent DNA polymerases are responsible for directing the synthesis of new DNA from deoxyribonucleotide triphosphates (dNTPs) opposite an existing DNA template, which contains the genetic information critical to an organism’s survival. What is the difference between DNA-dependent DNA polymerase and DNA-dependent RNA polymerase? The DNA polymerase adds dATP, dGTP, dCTP