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ScienceNet - Life Sciences - Molecular & Cell Biology

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ScienceNet is a World Wide Web resource database in Science. It is a community service project by Science Centre Singapore, supported by Nanyang Technological University and National University of Singapore.

We offer free electronic access to various topics in Science and Technology. Feel free to browse through our database and see if we have the answers to your questions.

Life Sciences - Molecular & Cell Biology
Q20126 :	What is the problem of recreate Ebola from cDNA fragment? Otherwise it was easy to use it as bioweapon.
Q19847 :	In a eukayotic gene there are introns and exons. If those introns are unwanted and are cut off during translation, why are they initially present?
Q19826 :	Transcription is a process to build proteins, but this process itself involves proteins to build them... so how are these proteins made?
Q19562 :	Why does a lizard's tail grow again after it is cut off? Are there any other animals which can grow lost body parts again?
Q19215 :	Can you tell me something about cloning?
Q18878 :	How do transgenic plant occur? How can a normal person do a transgenic plant at home? What are the equipments needed?
Q18111 :	May I know how DNA and RNA are related to each other and what is RNA? I hope you could provide me with a few websites to visit. Thank you.
Q17995 :	Why are plants totipotent but animals are not?
Q16125 :	What exactly is polymerase chain reaction (PCR)? Who invented the PCR method?
Q15604 :	What are genes? How are they constructed?
Q14552 :	What is a stem cell?
Q14206 :	How many chromosomes does the onion Allium cepa have?
Q14115 :	I was told that DNA molecule twists as a "right-hand screw". But I have seen many drawings with a reversed twist. Are there left-hand DNA molecules?
Q13703 :	Can you give me the information on DNA model?
Q11753 :	What is actually inside the DNA chromatin thread? How tiny is the thread? If there is a picture of it, please send it to me.
Q11695 :	What is plasmid DNA?
Q11560 :	If there is a chromosomal abnormality of Chromosomes 19, 20, 21, and 22, what are the diseases that stem from this?
Q11001 :	Do you know a website where I can find pictures showing step-by-step how ribosomes produce protein?
Q10968 :	What is the difference in the DNA makeup between humans and other animals?
Q10586 :	What is chromosome?
Q10546 :	How many chromosomes does a sunflower have?
Q9897 :	What is DNA methylation? What happens to the DNA when it is methylated?
Q9024 :	What is the genetic basis for apoptosis?
Q7600 :	How many chromosomes does a horse, a donkey, and a mule have?
Q6497 :	How are proteins synthesised?
Q5152 :	What exactly are genes and chromosomes? How are they related to one another?
Q5129 :	I have recently heard about the polymerase chain reaction (PCR). May I have more information on this concept?
Q4738 :	Would cloning human beings be a possibility in the near future? What are the concerns about human cloning?
Q4138 :	What is DNA?
Q3712 :	What is molecular biology about? Does it just cover DNA and genetic engineering?
Q3211 :	What is the evolutionary significance of "Mitochondrial Eve"?
Q2086 :	If all cells of a multicellular organism contain the same genetic information, what accounts for cell specialisation? Would it be better for a living organism to be unicellular or multicellular?
Q1445 :	What will happen to the animal (eg. dog), if I were to implant the nucleus of a plant cell, to its cell. Is there a possibility that the dog will turn into a plant? Why?
Q694 :	How do DNA repair enzymes, when finding a mismatched basepair on DNA, know which strand is correct? I'm told that in prokaryotes the older strand (and therefore more likely to be correct) will be methylated (whereas it takes a while before the new strand is methylated) hence the other strand is changed. What happens when both strands have been methylated, and how is it done in eukaryotes?

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