25) Human cells, with the exception of the gametes, reproduce by mitosis. 26) Mo
ID: 259756 • Letter: 2
Question
25) Human cells, with the exception of the gametes, reproduce by mitosis.26) Most nonlethal mutations in somatic cells are passed along to the next generation.
27) A short segment of DNA that contains the code or blueprint for one or more proteins is called a gene.
28) Mitosis in mammals usually takes less than an hour.
29) The development of induced pluripotent stem cells would make possible therapeutic cloning without the use of embryos.
30) Differentiation is the process of sister chromatids separating from each other during meiosis II.
31) A cell cycle of a cell in which DNA replication was faulty, failing to complete replication of all of the DNA, would likely be halted at the M checkpoint.
32) Differentiation of embryonic cells begins immediately upon the first division of the fertilized egg.
33) In order to increase the speed of replication, the DNA molecule is opened at several locations creating multiple replication bubbles where complementary strands are formed.
34) Mutations in DNA are usually repaired in healthy cells by DNA repair enzymes.
35) The process through which DNA is copied into a complementary strand of mRNA is called translation.
36) Embryo splitting as a means of reproductive cloning is typically done at the 32- or 64-cell stage.
37) Somatic cell nuclear transfer is a means of reproductive cloning.
38) During meiosis, homologous chromosomes are separated during meiosis I.
39) During the cell cycle, DNA replicates during the late G1 phase.
40) Initiation of translation begins with a tRNA binding its anticodon to the start codon of mRNA at a ribosome. 25) Human cells, with the exception of the gametes, reproduce by mitosis.
26) Most nonlethal mutations in somatic cells are passed along to the next generation.
27) A short segment of DNA that contains the code or blueprint for one or more proteins is called a gene.
28) Mitosis in mammals usually takes less than an hour.
29) The development of induced pluripotent stem cells would make possible therapeutic cloning without the use of embryos.
30) Differentiation is the process of sister chromatids separating from each other during meiosis II.
31) A cell cycle of a cell in which DNA replication was faulty, failing to complete replication of all of the DNA, would likely be halted at the M checkpoint.
32) Differentiation of embryonic cells begins immediately upon the first division of the fertilized egg.
33) In order to increase the speed of replication, the DNA molecule is opened at several locations creating multiple replication bubbles where complementary strands are formed.
34) Mutations in DNA are usually repaired in healthy cells by DNA repair enzymes.
35) The process through which DNA is copied into a complementary strand of mRNA is called translation.
36) Embryo splitting as a means of reproductive cloning is typically done at the 32- or 64-cell stage.
37) Somatic cell nuclear transfer is a means of reproductive cloning.
38) During meiosis, homologous chromosomes are separated during meiosis I.
39) During the cell cycle, DNA replicates during the late G1 phase.
40) Initiation of translation begins with a tRNA binding its anticodon to the start codon of mRNA at a ribosome. 25) Human cells, with the exception of the gametes, reproduce by mitosis.
26) Most nonlethal mutations in somatic cells are passed along to the next generation.
27) A short segment of DNA that contains the code or blueprint for one or more proteins is called a gene.
28) Mitosis in mammals usually takes less than an hour.
29) The development of induced pluripotent stem cells would make possible therapeutic cloning without the use of embryos.
30) Differentiation is the process of sister chromatids separating from each other during meiosis II.
31) A cell cycle of a cell in which DNA replication was faulty, failing to complete replication of all of the DNA, would likely be halted at the M checkpoint.
32) Differentiation of embryonic cells begins immediately upon the first division of the fertilized egg.
33) In order to increase the speed of replication, the DNA molecule is opened at several locations creating multiple replication bubbles where complementary strands are formed.
34) Mutations in DNA are usually repaired in healthy cells by DNA repair enzymes.
35) The process through which DNA is copied into a complementary strand of mRNA is called translation.
36) Embryo splitting as a means of reproductive cloning is typically done at the 32- or 64-cell stage.
37) Somatic cell nuclear transfer is a means of reproductive cloning.
38) During meiosis, homologous chromosomes are separated during meiosis I.
39) During the cell cycle, DNA replicates during the late G1 phase.
40) Initiation of translation begins with a tRNA binding its anticodon to the start codon of mRNA at a ribosome.
Explanation / Answer
25. In humans gametes are formed by meiosis. Remaining all cells are formed by mitosis only. Gametes do not divide either by mitosis or by meiosis.
26. Whether it is lethal or non-lethal, mutations of somatic cells do not get passed on to the next generation.
27. Yes, a short segment of DNA that contains coded information for the synthesis of a protein is called a gene.
28.the total cell cycle in humans takes place in approximately24 hours of time. In that alone mitosis or cell division takes more than an hour.
29. Pleuripotent stem cells provide the advantage of replenishing the cells and tissues in the conditions of damages or diseases. Thus induced Pleuripotent cells would make possible therapeutic cloning without using the embryos.
30. Differentiation is a process in which the dividing cells stop dividing and attain a permanent function.
31. A cell cycle in which DNA Replication is faulty, will be stopped at 'S' check point, because DNA Replication takes place during S phase but not at M phase.
32. Differentiation of embryonic cells does not begin immediately after the first division of fertilized egg. It occurs after gastrulation.
33. In prokaryotic cells only one Ori C or origin of replication is present, where DNA unwinds for replication. In eukaryotic cells due to large size of DNA opens at multiple sites to speed up replication.
34. Minor or small mutations are repaired in somatic cells are repaired by DNA repair enzymes. Large mutations are not repaired.
35. The process of by which DNA is copied into complementary strand of m RNA is called 'transcription' but not translation.
36.Embryo splitting as a means of reproductive cloning is typically done at 4-celled blastomere stage, but not at 32- or 64- celled stage.
37.Somatic cell nuclear transfer is carried out in reproductive cloning. 'Dolly' was created like this only.
38.meiosis I is the actual reductional division, where in homologous chromosomes are separated from each other into two daughter cells.
39. During the cell cycle DNA Replication occurs at 'S' phase, but not at late G1.
40.During initiation of translation the tRNA that contains anticodon for the start codon of mRNA will come and bind with mRNA at its start codon.tRNA does not bind with any anticodon, because tRNAs are made with preformed anticodons for various codons of mRNA.
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