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ScienceNet - Life Sciences - Biochemistry/ Biophysics

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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 - Biochemistry/ Biophysics
Q20090 :	The photographs of deep sky objects in astronomy books display a wide range of colours. Are these colours enhanced or if I were there, would I see them?
Q19964 :	Why does watermelon taste sweeter after putting salt on it?
Q19390 :	What exactly is biochemistry? Please provide some examples.
Q19212 :	How are proteins denatured? How do heavy metal ions such as copper denature proteins?
Q19179 :	May I have an explanation on how biochemicals in plants like mushrooms combat cancer in humans? And specifically what types and/or properties of cancer to they target?
Q18990 :	What is bioluminescence?
Q18890 :	How is coenzymes derived from vitamins? Please give example.
Q18644 :	Where does cellulose come from in plants? Thank you for your time!
Q17792 :	What will happen if we breathe in helium?
Q17744 :	How do dietary fats affect our blood cholesterol levels?
Q17512 :	How do heavy metals such as lead affect cell membrane permeability?
Q17273 :	Do animals see in colour?
Q17272 :	What are the factors that could affect the quality of a tea beverage?
Q16440 :	My sister asked me what does potassium chloride do to our body. How does it enter our body? If its harmful, how does we avoid it?
Q15347 :	What are the amino acids humans can make?
Q15125 :	Why are chloride ions important for animals and plants? What is there significance to their processes?
Q14724 :	Why do sunflowers turn with the Sun?
Q14402 :	What is the effects of acids on proteins?
Q14273 :	Why is it that when we add salt to sour food, the food will not taste as sour as before? The food can be pineapple or lemon tea. What exactly cause the food not to taste that sour? Has it got to do with our taste buds or some reactions have taken place when we add salt?
Q14200 :	I need a list of the chemical elements found in human blood and its percent composition. Thanks a lot.
Q14173 :	The xylem vessels are dead without protoplasm for efficient transport of water in the plants. Water is drawn up the vessels. However for phloem vessels, it is made up of elongated cells and transport manufactured food by the cells through diffusion. My question is why the structure of the xylem vessels is not like the phloem or vice-versa? For example, why xylem vessels is not make up of cells and transport water through osmosis? Why phloem vessels is not empty without protoplasm, so that transportation of food is faster?
Q14162 :	Are bird droppings faeces? Why are they white in colour?
Q14024 :	Who has developed the method of transferring of DNA? What is the use of transferring DNA? What are the possible risks involved in transferring DNA?
Q13891 :	Does processed food produce more gas than non-processed food? Particularly beans and potatoes?
Q13830 :	What is the chemical composition of durian that gives its distinctive odour? People always believe that durian should not be eaten with alcohol. Were there any scientific investigations done on the subject?
Q13770 :	What's the first food that was genetically modified? Why do scientists modify the food? The whole program for genetically modified food begun at what time and what's the reason behind it for it to begin?
Q13535 :	Is it true that certain food/diet can caused the blood in our body to become acidic or alkaline? What is the ideal pH of blood?
Q13503 :	Is the vaginal discharge acidic or alkaline? Thank you for your time.
Q13428 :	If you had to answer YES or NO to the question: Are GMOs safe to eat? What would you say? Thank You.
Q13386 :	How is it possible for us to create genetically modified organisms -- meaning how do you remove unwanted genes?
Q13368 :	When one exercises in the park at 5 a.m. in the morning, will he or she be affected by the carbon dioxide produces from the plants. Thank you.
Q12721 :	I heard that chlorophyll is of a similar structure to the human haemoglobin, only that the iron is replaced by magnesium instead. Some claim that due to this property, chlorophyll can detox our blood and that a diet containing chlorophyll can have the effect of a blood transfusion! However, when the chlorophyll is digested in our guts, what kind of molecule is it being broken down to? And what is absorbed as nutrient?
Q12655 :	I am a school student doing a project on plants. I am doing an experiment on what type of light is best for plants to photosynthesis best. I am half way through and so far my studies have led me to believe that green light is the worst kind of light for photosynthesis. Can you come up with a reasonable answer to why this happens?
Q12614 :	If plants can make food, do they eat the food? If they do, how do they do it?
Q12368 :	I heard that some plants that live by swamps/marshes dispel excess salt through their leaves. Is it true for all plants that live by the marshes?
Q12142 :	What is a food pyramid?
Q12029 :	My little brother began potty training on one of my Mom's house plants and the plant died. What is the substance in urine that kills the plant? I am doing a science project on how urine affects houseplants. Can you please help me?
Q11976 :	How is the palisade cell suited to its function?
Q11255 :	What are the roles of the following elements in the human body? Fluorine, Phosphorus, Potassium, Sodium, Iron and Iodine.
Q10903 :	What would be the function of a hydrolytic enzyme?
Q10890 :	Can you tell me a bit more about the energy flow of a cell?
Q10738 :	What is the biological significance of water as a solvent?
Q10267 :	What is gibberellic acid? What does it do?
Q10092 :	How do enzymes work?
Q9848 :	How do birds fly?
Q9794 :	What roles does phosphorus play in the body? What are some sources of phosphorus?
Q9678 :	Do you have any information about carotenoprotein?
Q9461 :	My skin turns yellow after eating lots of carrots. Will the process reverse after I stop taking that much carrots?
Q8634 :	What is bilirubin?
Q8229 :	When you peel an orange, a white substance sticks on the fresh or pulp. What is this substance called? Thank you.
Q8095 :	How exactly does a fruit ripen? Why is the bottom of most fruits such as papaya and pineapple sweeter at the lower part than the top while watermelon is sweeter at its centre? Is it due to the way they develop or gravity does play a part in the distribution of sugars in them?
Q8048 :	Why do plants initially grow faster in dark than in light if they are planted on the same day with the same amount of water?
Q7897 :	What are plastids? What are their characteristics? What is the function that plastids fulfil in a plant cell?
Q7597 :	What are genetically modified foods? Are they safe for consumption?
Q7259 :	What is the application of physics in the field of biology? Please cite example.
Q7185 :	Can you please explain the process of the Hill reaction?
Q7043 :	Why roots grow downward and stems grow upward?
Q6825 :	Why is ascorbic acid so abundant in fruits and vegetables?
Q6799 :	When shrimps are raw, they are greyish-green. So, how and why do they turn red when you cook them?
Q6794 :	What is auxin?
Q6683 :	Why does adding food colouring to water affect the colour of white flowering plants, like in carnations and daisies? Is it the root system?
Q6512 :	What is the definition of biotechnology?
Q5782 :	Amino acids can exist in two types - being left-handed and right-handed. Please elaborate more on it and why isn't there a balance in such types of amino acids on Earth compared to the rest of the Universe?
Q5472 :	Why is it not good to eat potato that has too many buds?
Q4917 :	Why does chilli burn? What are the hottest chillies?
Q4800 :	Does aspirin prolong the life of flower?
Q4580 :	For green plants, which colour (wavelength) of light is most effective in photosynthesis?
Q4494 :	Without light for photosynthesis, what gases are used and produced by plants at night?
Q4389 :	What are the steps of photosynthesis?
Q4025 :	Does music affect plant growth? If so, how?
Q3849 :	I am trying to do a science experiment to test the effectiveness of different antacids on an acid stomach. I am looking for an acidic substance to mimic an acid stomach. Any recommendations? Also, what is the pH level of an acid stomach?
Q3516 :	What is the effect of Viagra in plants?
Q3444 :	I heard that bacteria could be used to synthesise insulin. How does this process work?
Q3235 :	What are the disadvantages and advantages of biotechnology?
Q3116 :	What is the composition of a cell? How is cloning made possible?
Q3105 :	Why is cow's milk white?
Q2562 :	Are the applications of genetic engineering to agriculture a good or bad thing?
Q2434 :	If you clone a person, will the "new" person have the same fingerprints as the "original" person?
Q2088 :	Plants carry out photosynthesis in the presence of sunlight. Will plants respond in the same way under fluorescent lamp?
Q1969 :	How does light affect plant growth?
Q1813 :	It is clear that surface tension of a liquid can explain capillary action up to a point, i.e. lift water a foot or so. But, how does water get to the top section of trees which may measure hundreds of feet high?
Q1428 :	What is floriculture and effects of genetic engineering on it?
Q1272 :	Is it true that scientists are able to change the genes of a child by adding in chemicals to the father's sperms? How does it work?
Q828 :	Why do we still worry about the extinction of animals when they can be reproduced by "cloning"?
Q722 :	What is cloning? How do scientists clone animals? What are the advantages and disadvantages of cloning an animal?
Q498 :	If I have a blood stain on my dress, what is the best way to get rid of it? What is a good solvent for human blood?
Q469 :	My question is what and how many things have scientists cloned or genetically engineered that actually came out good?
Q426 :	What is the human body made of?
Q202 :	Biotechnology would one day be a major part of science and industry. How would it influence our way of life?
Q73 :	Why is auxin light-shy? Is it the only plant growth hormone?
Q66 :	May I know how the hormones in one's body work?
Q22 :	How does the venus flytrap catch its prey?

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