The cell cycle is composed of interphase (G₁, S, and G₂ phases), followed by the mitotic phase (mitosis and cytokinesis), and G₀ phase.
Log in Marissa Schiavo 6 years agoPosted 6 years ago. Direct link to Marissa Schiavo's post “When are mutations more l...” When are mutations more likely to occur in the cell cycle? Is there a specific stage in mitosis or phase that leaves the DNA extremely susceptible or vulnerable to mutations? Or can mutations occur at any given moment? When is the DNA most vulnerable to external factors that could create mutations in the genetic code? • (17 votes) tyersome 6 years agoPosted 6 years ago. Direct link to tyersome's post “Interesting question!I'...” Interesting question! I'm not sure how well studied this is, but the consensus seems to be that mutations mostly happen during DNA synthesis — i.e. S phase. A major reason for this is that DNA synthesis introduces many errors — some of which are not corrected. (30 votes) sriram krishna 9 years agoPosted 9 years ago. Direct link to sriram krishna's post “what is the difference be...” what is the difference between DNA & RNA? • (10 votes) Ted S. 8 years agoPosted 8 years ago. Direct link to Ted S.'s post “to be more specific, ther...” to be more specific, there are 3 main RNA types: mRNA (matrix) - is copied from DNA, to later copy proteins off it, rRNA (ribosomal) - is what ribosomes are made of, and it makes proteins, using mRNA, tRNA (transport) - holds amino acids, which are later brought to rRNA with mRNA to make proteins. (34 votes) Anthony Garcia 6 years agoPosted 6 years ago. Direct link to Anthony Garcia's post “Why do cells divide than ...” Why do cells divide than grow • (7 votes) Life Learner 6 years agoPosted 6 years ago. Direct link to Life Learner's post “I think they grow to acco...” I think they grow to accommodate for the doubling of new organelles and the split of DNA in later stages. After that, then they split. I hope it helps :-) (12 votes) dferrell 8 years agoPosted 8 years ago. Direct link to dferrell's post “What is the DNA inside a ...” What is the DNA inside a cell called? genetic material or chromosome? • (6 votes) City Face 8 years agoPosted 8 years ago. Direct link to City Face's post “DNA is genetic material, ...” DNA is genetic material, and the way it is physically present in our nuclei is by being condensed into chromosomes. (9 votes) August LeCaine 7 years agoPosted 7 years ago. Direct link to August LeCaine's post “How long does it take for...” How long does it take for a cell to fully grow? Days, weeks? • (6 votes) Ivana - Science trainee 5 years agoPosted 5 years ago. Direct link to Ivana - Science trainee's post “It really depends from ce...” It really depends from cell to cell. Division and growth of cells take 24 hours for many human cells, but liver cells take more than a year and neuronal cells take many years and once they fully develop they never re-enter the cell cycle. For example, sex cells, spermatozoids take 74 days to fully finish the cycle, while oocyte sometimes takes 40 years. (meiosis starts when the female embryo is in mom's uterus and stops until puberty, then that same oocyte may not be 'unlocked' until the age of 40+). (7 votes) jasminechester81 a year agoPosted a year ago. Direct link to jasminechester81's post “in other words, you go fr...” in other words, you go from a cell to a cell. • (4 votes) kwenorteyesther 2 years agoPosted 2 years ago. Direct link to kwenorteyesther's post “If some specialized cell ...” If some specialized cell like the neuron are unable to leave the G1 stage how do they heal when they are damaged. • (5 votes) Delta Whiskey a year agoPosted a year ago. Direct link to Delta Whiskey's post “The thing with the neuron...” The thing with the neuron is that they are unable to heal after being damaged (unless it is a motor neuron), so therefore, they stay damaged and may lead to a state of paralysis (3 votes) Zhiyu Zhou a year agoPosted a year ago. Direct link to Zhiyu Zhou's post “In my textbook, it says t...” In my textbook, it says the chromatin fibres condense into chromosomes in prophase. However, here it says the chromosomes already existed in interphase, but in the form of chromatins. Which one is correct? • (5 votes) shira.kafri a year agoPosted a year ago. Direct link to shira.kafri's post “Right after the cell is b...” Right after the cell is born, the DNA is in the form of chromosomes, but in early G1 phase, the chromosomes break apart into chromatids and are only reformed as chromosomes in early prophase, in preparation for division. Pretty much once the nuclease is formed in the young cell, the chromosomes are free to break apart into the thinner strands called chromatins. But once prophase starts, the DNA has to be collected and organized for division so they regroup/bundle up as chromosomes. (2 votes) Marianne 8 years agoPosted 8 years ago. Direct link to Marianne's post “About the mitosis. Why do...” About the mitosis. Why does a cell have to divide? Is it because our body needs more cells because others die? For example if you make a cut onto your finger. If that's the case, what about the inner cells, say, cells of liver or heart? • (2 votes) City Face 8 years agoPosted 8 years ago. Direct link to City Face's post “Many cells have a limited...” Many cells have a limited life span, so mitosis needs to occur so that healthy, living cells can be maximized. (6 votes) Thandeka Masango 6 years agoPosted 6 years ago. Direct link to Thandeka Masango's post “How does a cell copy its ...” How does a cell copy its DNA? • (3 votes) Tomas Lopez 6 years agoPosted 6 years ago. Direct link to Tomas Lopez's post “Hi Thandeka, The way a ...” Hi Thandeka, The way a cell copies its DNA is actually a pretty complex (but very interesting!) process. There are quite a few steps to this, but the main process that copies the DNA of a cell is called transcription. Khan Academy has some fantastic videos about transcription, you can watch one using the following link: https://www.khanacademy.org/science/biology/gene-expression-central-dogma/central-dogma-transcription/v/rna-transcription-and-translation Happy learning! (4 votes)Want to join the conversation?
To sum up, DNA holds information on how to make all proteins, and all the RNA work to make them.
