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Oogenesis
The formation of the ovum (mature female gamete) from undifferentiated germ cells is called oogenesis. This process takes place in the ovaries (female gonads). Oogenesis consists of three stages known as the multiplication phase, growth phase, and maturation phase.
Cell Division
Cell division involves the formation of new daughter cells from the parent cells. It is a part of the cell cycle that takes place in both prokaryotic and eukaryotic organisms. Cell division is required for three main reasons:
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- What is the function of DNA polymerase? a. It degrades DNA in cells. b. It adds RNA nucleotides to a new strand. c. It coils DNA around histones to form chromosomes. d. It adds DNA nucleotides to a replicating strand. e. None of these.Some Processes Involved in DNA Replication The replication origin is identified. DNA primase builds RNA primer. Okazaki fragments are spliced by DNA ligase. Helicases bind and uncoil the DNA double helix. RNA primer is the starting point for DNA polymerase. DNA replication ends at the telomere where DNA codes for termination. DNA polymerase adds complementary nucleotides in the 5' to 3' direction in short segments called Okazaki fragments. The sequence in which the events numbered above occur during DNA replication of the lagging strand is:Some Processes Involved in DNA Replication The replication origin is identified. DNA primase builds RNA primer. Okazaki fragments are spliced by DNA ligase. Helicases bind and uncoil the DNA double helix. RNA primer is the starting point for DNA polymerase. DNA replication ends at the telomere where DNA codes for termination. DNA polymerase adds complementary nucleotides in the 5' to 3' direction in short segments called Okazaki fragments. The sequence in which the events numbered above occur during DNA replication of the lagging strand is Answer, Answer, Answer, Answer, Answer, Answer, and Answer.
- Which of the following replication proteins is incorrectly paired with it’s function? DNA polymerase - adds nucleotides to the growing strand Single stranded binding proteins - hold the DNA strands apart while they are being replicated Ligase - enhances separation of DNA strands Topoisomerase - relieves torsional stress due to unwinding by the DNA Primase - synthesizes a short RNA sequence to initiate replicationMatch the enzymes involved in DNA replication with their function. Primase [ Choose ] [ Choose] Synthesizes short RNA segment to initiate new DNA strand Helicase Main enzyme that extends RNA primer by adding DNA nucleotides to it Stabilizes single-stranded DNA Relieves over-winding of DNA ahead of the replication fork Removes RNA primers preceding Okazaki fragment and replaces RNA nucleotides with DNA nucleotides Single-stranded binding proteins Unwinds DNA helix Synthesizes the ends of the linear chromosome Seals nicks between adjacent DNA segments DNA polymerase III [ Choose ] DNA polymerasel [ Choose ] DNA Ligase [ Choose ] Topoisomerase [ Choose ]During DNA replication, DNA polymerase adds nucleotides to the: 3' end of the newly synthesized strand as it moves toward the 3' end of the template strand 3' end of the newly synthesized strand as it moves toward the 5'end of the template strand 5' end of the newly synthesized strand as it moves toward the 5' end of the template strand 5' end of the newly synthesized strand as it moves toward the 3' end of the template strand none of the above 0 0 0 0 0
- cytosine In DNA, guanine always forms hydrogen bonds with The process of eplication produces a new copy of an organism's genetic information, which is pass What is the first step in the process of DNA replication? Unzip the DNA Which enzyme is responsible for "unzipping" the DNA double helix? helicase Which enzyme is responsible for assembling the DNA during replication? DNA polymerase Why is DNA replication important to the growth and development of a multi-cellular organism? Because the daughter cells need a complete set of DNA Write the complementary bases of the strand below according to the base-pair rule. ATCCAGTAG GAC TAGGICATCCTG Writing a Full Strand: 1. A. Original DNA: Complementary DNA: CCT ATA TCT CTC TAT ATC TCT CAT ACT GTG TGT CTC TAT B. Make identical strands of DNA CCT ATA TCT CTC TAT ATC TCT CAT ACT GTG TGT CTC TAT (original) (new) A. Original DNA: Complementary DNA: (new) (complementary from 1A) CCG GAT TTT AAT TAG CTA CTA TCG TAC TAC GTT GGT GCT B. Make identical…Match the following descriptions with the enzymes involved in DNA replication. Adds an RNA primer to begin elongation Removes the RNA primer from the beginning of the newly constructed strands Splices lagging strand segments Cleaves the rung of the DNA double helix ladder Description: Answer Answer Answer Answer Enzyme: Helicase DNA Polymerase Primase DNA LigaseWhich of the following best describes the process of DNA replication? (type 1, 2 or 3 in the blank) conservative model semi-conservative model dispersive model The model that best describes DNA replication essentially means the DNA is kept intact and a copy is made by enzymes the DNA is separated and a new daughter copy is paired to each parental strand the DNA is dispersed into small nucleotide segments and copied pieces are inserted into the gaps
- Please put these steps in the correct order.Is this for leading or lagging strand dsDNA pried apart. Nucleotides added on to the 3’ end of DNA. Single stranded DNA binding proteins bind. Initiator proteins bind dsDNA. RNA nucleotides are replaced with DNA nucleotides (proofreading while they go) RNA primer degraded. Primase begins replication.Which of the following statements is/are TRUE for DNA Replication? Two daughter DNAs are formed, each one contains an old and new strands. When the (parent) DNA strands unwind, the 3'→ 5' strand is the leading strand while the 5'→3' strand is the lagging strand. Requires dATP, dTTP, dGTP, dCTP and Mg2+ The replisome is the biological machine responsible in replicating DNA.Match the proteins with their function in DNA replication. unwinds DNA at replication fork forms covalent phosphodiester bonds to join DNA fragments remove primer and replace the RNA with DNA, also has 3'-> 5'exonuclease activity for proofreading synthesizes DNA by adding to the 3' end of the growing strand of DNA adds RNA primer uses an RNA template to facilitate extension of the telomeres in eukaryotes helicase DNA ligase DNA polymerase II introduces a double-stranded break ahead of the replication fork and swivels the cleaved ends around the central axis to relieve the stress of helix unwinding DNA polymerase III DNA primase telomerase DNA Gyrase (topoisomerase)
