$ Ergosterol is a lipid that changes to vitamins D on activation by UV light. ! Iron is a biochemical compoent of haemoglobin.

$ Ergosterol is a lipid that changes to vitamins D on activation by UV light. ! Iron is a biochemical compoent of haemoglobin.
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$ Ergosterol is a lipid that changes to vitamins D on activation by UV light. ! Iron is a biochemical ... is wrong D. If both As and R are wrong.
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Vitamin D is manufactured by the activation of ergosterol by U.V light in the (a) liver (b) skin (c) bone (d) muscle

Description : Vitamin D is manufactured by the activation of ergosterol by U.V light in the (a) liver (b) skin (c) bone (d) muscle

Last Answer : Ans:(b)

One international unit (I.U) of vitamin D is defined as the biological activity of (A) 0.025 µg of cholecalciferol (B) 0.025 µg of 7-dehydrocholecalciferol (C) 0.025 µg of ergosterol (D) 0.025 µg of ergocalciferol VITAMINS 113

Description : One international unit (I.U) of vitamin D is defined as the biological activity of (A) 0.025 µg of cholecalciferol (B) 0.025 µg of 7-dehydrocholecalciferol (C) 0.025 µg of ergosterol (D) 0.025 µg of ergocalciferol VITAMINS 113

Last Answer : Answer : A

If the activation energy of a biochemical reaction is lowered then?

Description : If the activation energy of a biochemical reaction is lowered then?

Last Answer : What is the answer ?

Metabolism is carried out by a large class of proteins that decrease the activation energy required for chemical reactions inside a cell. Therefore they only facilitate reactions that would naturally occur at a much slower rate. What is the name of these proteins that speed up biochemical reactions?

Description : Metabolism is carried out by a large class of proteins that decrease the activation energy required for chemical reactions inside a cell. Therefore they only facilitate reactions that would naturally occur at a much slower rate. What is the name of these proteins that speed up biochemical reactions?

Last Answer : Enzymes

Dolichol phosphate is A- a complex lipid involved in docking vesicles with the plasma membrane B- the anchor on which sugars assemble before transfer to proteins C- a chaperone used in protein folding D- a product of phospholipase C activation

Description : Dolichol phosphate is A- a complex lipid involved in docking vesicles with the plasma membrane B- the anchor on which sugars assemble before transfer to proteins C- a chaperone used in protein folding D- a product of phospholipase C activation

Last Answer : the anchor on which sugars assemble before transfer to proteins

$ The tissue which connects a bone to the muscles is called cartilage. ! Haemoglobin of blood combines permanently with oxygen

Description : $ The tissue which connects a bone to the muscles is called cartilage. ! Haemoglobin of blood combines permanently with oxygen

Last Answer : $ The tissue which connects a bone to the muscles is called cartilage. ! Haemoglobin of blood combines ... wrong D. If both As and R are wrong.

The active transport of ‘Ca’ is regulated by __________ which is synthesized in kidnyes. (A) Cholecalciferol (B) Ergosterol (C) 25-OH cholecalciferol (D) 1, 25-di OH-Cholecalciferol

Description : The active transport of ‘Ca’ is regulated by __________ which is synthesized in kidnyes. (A) Cholecalciferol (B) Ergosterol (C) 25-OH cholecalciferol (D) 1, 25-di OH-Cholecalciferol

Last Answer : Answer : D

Vitamin D2 is also said to be (A) Activated ergosterol (B) Fergocalciferol (C) Viosterol (D) All of these

Description : Vitamin D2 is also said to be (A) Activated ergosterol (B) Fergocalciferol (C) Viosterol (D) All of these

Last Answer : Answer : D

A provitamin D synthesized in human beings is (A) Ergosterol (B) 7-Dehydrocholesterol (C) Cholecalciferol (D) 25-Hydroxycholecalciferol

Description : A provitamin D synthesized in human beings is (A) Ergosterol (B) 7-Dehydrocholesterol (C) Cholecalciferol (D) 25-Hydroxycholecalciferol

Last Answer : Answer : B

Ergosterol is found in (A) Animals (B) Plants (C) Bacteria (D) All of these

Description : Ergosterol is found in (A) Animals (B) Plants (C) Bacteria (D) All of these

Last Answer : Answer : B

Provitamin D3 is (A) Cholecalciferol (B) Ergosterol (C) 7-Dehydrocholesterol (D) Ergocaliferol

Description : Provitamin D3 is (A) Cholecalciferol (B) Ergosterol (C) 7-Dehydrocholesterol (D) Ergocaliferol

Last Answer : Answer : C

A metabolite which is common to pathways of cholesterol biosynthesis from acetyl-CoA and cholecalciferol formation from cholesterol is (A) Zymosterol (B) Lumisterol (C) Ergosterol (D) 7 Dehydrocholesterol

Description : A metabolite which is common to pathways of cholesterol biosynthesis from acetyl-CoA and cholecalciferol formation from cholesterol is (A) Zymosterol (B) Lumisterol (C) Ergosterol (D) 7 Dehydrocholesterol

Last Answer : Answer : D

Unpleasant odours and taste in a fat (rancidity) can be delayed or prevented by the addition of (A) Lead (B) Copper (C) Tocopherol (D) Ergosterol

Description : Unpleasant odours and taste in a fat (rancidity) can be delayed or prevented by the addition of (A) Lead (B) Copper (C) Tocopherol (D) Ergosterol

Last Answer : Answer : C

The precursor of bile salts, sex hormones and vitamin D is (A) Diosgenin (B) Cholesterol (C) Campesterol (D) Ergosterol

Description : The precursor of bile salts, sex hormones and vitamin D is (A) Diosgenin (B) Cholesterol (C) Campesterol (D) Ergosterol

Last Answer : Answer : B

By which of the following means antifungal chemotherapeutic agents may affect fungi? A- Interfere with nuclear division by preventing the aggregation of microtubules needed for mitosis B- Interfere with normal nucleic acid synthesisInterfere with ergosterol biosynthesis and thus alter the structure of the cytoplasmic C- membrane as well as the function of several membrane-bound enzymes like thoseinvolved in nutrient transport and chitin synthesis D- all of these

Description : By which of the following means antifungal chemotherapeutic agents may affect fungi? A- Interfere with nuclear division by preventing the aggregation of microtubules needed for mitosis B- ... membrane-bound enzymes like thoseinvolved in nutrient transport and chitin synthesis D- all of these

Last Answer : all of these

Leishmania donovani is susceptible to certain antifungal drugs because both fungi and Leishmania: A. Utilise purine salvage pathway B. Utilise similar glycolytic mechanisms C. Have similar topoisomerase II enzyme D. Have ergosterol in their cell membranes

Description : Leishmania donovani is susceptible to certain antifungal drugs because both fungi and Leishmania: A. Utilise purine salvage pathway B. Utilise similar glycolytic mechanisms C. Have similar topoisomerase II enzyme D. Have ergosterol in their cell membranes

Last Answer : D. Have ergosterol in their cell membranes

The most probable mechanism of action of imidazole antifungal drugs is: A. They bind to ergosterol in fungal cell membrane and make it leaky B. They interfere with ergosterol synthesis by fungi C. They interfere with fungal mitosis D. They block oxidative phosphorylation in fungi

Description : The most probable mechanism of action of imidazole antifungal drugs is: A. They bind to ergosterol in fungal cell membrane and make it leaky B. They interfere with ergosterol synthesis by fungi C. They interfere with fungal mitosis D. They block oxidative phosphorylation in fungi

Last Answer : B. They interfere with ergosterol synthesis by fungi

The polyene antibiotics act by: A. Inhibiting fungal cytochrome P450 enzyme B. Binding to ergosterol and creating micropores in fungal cell membrane C. Inhibiting fungal DNA synthesis D. Disorienting microtubules in fungal cells

Description : The polyene antibiotics act by: A. Inhibiting fungal cytochrome P450 enzyme B. Binding to ergosterol and creating micropores in fungal cell membrane C. Inhibiting fungal DNA synthesis D. Disorienting microtubules in fungal cells

Last Answer : B. Binding to ergosterol and creating micropores in fungal cell membrane

A catalyst is a substance which (a) Changes the equilibrium of a reaction so that the concentration of the product increases (b) Increases the rate of reaction and increases the equilibrium concentration of products (c) Hastens the attainment of equilibrium (d) Increases the activation energy

Description : A catalyst is a substance which (a) Changes the equilibrium of a reaction so that the concentration of the product increases (b) Increases the rate of reaction and increases the equilibrium concentration of products (c) Hastens the attainment of equilibrium (d) Increases the activation energy

Last Answer : Ans:(c)

The minimum energy required to allow a chemical reaction to proceed is termed as the 'threshold energy '. Chemical reactions with low activation energy are: (A) Always irreversible (B) Insensitive to temperature changes (C) Mostly irreversible (D) Highly temperature sensitive

Description : The minimum energy required to allow a chemical reaction to proceed is termed as the 'threshold energy '. Chemical reactions with low activation energy are: (A) Always irreversible (B) Insensitive to temperature changes (C) Mostly irreversible (D) Highly temperature sensitive

Last Answer : (B) Insensitive to temperature changes

If the rate of a chemical reaction becomes slower at a given temperature, then the (A) Initial concentration of the reactants remains constant (B) Free energy of activation is lower(C) Entropy changes(D) Free energy of activation is higher

Description : If the rate of a chemical reaction becomes slower at a given temperature, then the (A) Initial concentration of the reactants remains constant (B) Free energy of activation is lower (C) Entropy changes (D) Free energy of activation is higher

Last Answer : (D) Free energy of activation is higher

Pick out the correct statement. (A) A catalyst does not change AH of the reaction (B) A catalyst changes the equilibrium point (C) Law of mass action was suggested by Le-Chatelier (D) The difference between the energy of reactants and that of the products is the activation energy

Description : Pick out the correct statement. (A) A catalyst does not change AH of the reaction (B) A catalyst changes the equilibrium point (C) Law of mass action was suggested by Le-Chatelier (D) The difference between the energy of reactants and that of the products is the activation energy

Last Answer : (A) A catalyst does not change AH of the reaction

The catalyst in a first order chemical reaction changes the (A) Equilibrium constant(B) Activation energy(C) Heat of formation of the product(D) Heat of reaction

Description : The catalyst in a first order chemical reaction changes the (A) Equilibrium constant (B) Activation energy (C) Heat of formation of the product (D) Heat of reaction

Last Answer : (B) Activation energy

Will the UV light from a bug zapper placed over my pond hurt the frogs' eyes?

Description : Will the UV light from a bug zapper placed over my pond hurt the frogs' eyes?

Last Answer : No. The sun’s UV rays have never hurt frogs and I doubt the frogs would be staring directly at the UV light anyway…

Any suggestions for a good UV/black light?

Description : Any suggestions for a good UV/black light?

Last Answer : Just one thing – blacklight tends to make, er, protein stains show up. Bathroom not exactly the place to be proclaiming where someone marked their territory, if y’know what I mean.

Is it possible to have a fabric that just allows UV light through ?

Description : Is it possible to have a fabric that just allows UV light through ?

Last Answer : Yes. That material is called Transol. Here is a non-technical article about it. Here is where you can buy it.

Are fish pond UV light ballasts typically somehow connected to the water pump?

Description : Are fish pond UV light ballasts typically somehow connected to the water pump?

Last Answer : They should be two totally unrelated things. Question about your pump. Is it an external or internal pump? If its external it could have been ruined in the same way the ballast was.

Can a full spectrum light be substituted for a UV light?

Description : Can a full spectrum light be substituted for a UV light?

Last Answer : I’m not certain, but I don’t think so. If you have a window that gets a lot of sunlight you can try leaving him (her) there while the sun is shining. Pet stores usually have UV lights that can clip onto things, too.

Do I need special camera preparation or elements to shoot under UV light?

Description : Do I need special camera preparation or elements to shoot under UV light?

Last Answer : Shutter speed. Slowing the shutter speed will allow you to get the effect you're looking for since it's allowing more light to come in. What you'll want to do is turn off all source of light ... I do know of a a person on fluther that has some photography experience I'll recommend this thread to.

How do you remove cum stains so that UV light won't show it?

Description : How do you remove cum stains so that UV light won't show it?

Last Answer : I’ve tried many ways to do that haha. But I still haven’t been successful! The best thing I can think of is bleach, because washing it doesn’t seem to help!

Do our eyelids block out UV light?

Description : Do our eyelids block out UV light?

Last Answer : Well, I found an abstract of a study that measured UV and visible light transmission through eyelids. It found that while up to 77% of visible light is transmitted, negligible amounts of UV make it through (the URL is ... 't allow me to make a link out of it, but if you're interested I'll PM it).

what is uv light

Description : what is uv light

Last Answer : Need Answer

What color is the plant extract under UV light?

Description : What color is the plant extract under UV light?

Last Answer : Need answer

What is the temperature of a UV light?

Description : What is the temperature of a UV light?

Last Answer : the temperature of a UV light is 10nm-400 degrees fahrenheit

How can uv light affect an organism's trait?

Description : How can uv light affect an organism's trait?

Last Answer : Feel Free to Answer

Which one of the following is used for determining the structure of crystal - (1) Gamma rays (2) X-rays (3) UV rays (4) visible light

Description : Which one of the following is used for determining the structure of crystal - (1) Gamma rays (2) X-rays (3) UV rays (4) visible light

Last Answer : (2) X-rays Explanation: Crystallography is the science that examines crystals which can be found everywhere in nature, from salt to snowflakes to gemstones.

The radiant energy having lowest energy is – (1) gamma rays (2) UV rays (3) visible light (4) microwave radiation

Description : The radiant energy having lowest energy is – (1) gamma rays (2) UV rays (3) visible light (4) microwave radiation

Last Answer : (4) microwave radiation Explanation: The parts of the electromagnetic spectrum, arranged from highest energy to lowest, are gamma rays, Xrays, Ultraviolet light, visible light, infrared light, microwaves, and radio waves.

Which component of the protein absorb UV light at 280 nm?

Description : Which component of the protein absorb UV light at 280 nm?

Last Answer : Indole ring of tryptophan.

UV light falls in the category of------? A. Ionizing Radiations (Answer) B. Non Ionizing Radiation C. Visible light D. None

Description : UV light falls in the category of------? A. Ionizing Radiations (Answer) B. Non Ionizing Radiation C. Visible light D. None

Last Answer : A. Ionizing Radiations (Answer)

In gel electrophoresis, separated DNA fragments can be visualized with the help of (a) acetocarmine in bright blue light (b) ethidium bromide in UV radiation (c) acetocarmine in UV radiation (d) ethidium bromide in infrared radiation.

Description : In gel electrophoresis, separated DNA fragments can be visualized with the help of (a) acetocarmine in bright blue light (b) ethidium bromide in UV radiation (c) acetocarmine in UV radiation (d) ethidium bromide in infrared radiation.

Last Answer : (b) ethidium bromide in UV radiation

Chlorobenzene can be prepared by treatment of aniline with (a) Cuprous chloride (b) Chlorine in the presence of UV light (c) Nitrous acid followed by treatment with CuCl (d) Chlorine in the presence of FeCl3

Description : Chlorobenzene can be prepared by treatment of aniline with (a) Cuprous chloride (b) Chlorine in the presence of UV light (c) Nitrous acid followed by treatment with CuCl (d) Chlorine in the presence of FeCl3

Last Answer : Nitrous acid followed by treatment with CuCl

One indirect way to determine microbial growth is using a _____. a. UV light b. Spectrophotometer c. Light meter d. Radioactive counter

Description : One indirect way to determine microbial growth is using a _____. a. UV light b. Spectrophotometer c. Light meter d. Radioactive counter

Last Answer : b. Spectrophotometer

Toluene reacts with bromine in the presence of uv light to give (a) m-Bromotoluene (b) Benzyl bromide (c) o-Bromotoluene (d) Benzoyl bromide

Description : Toluene reacts with bromine in the presence of uv light to give (a) m-Bromotoluene (b) Benzyl bromide (c) o-Bromotoluene (d) Benzoyl bromide

Last Answer : Benzyl bromide

Which of the following reagents will react with methyl group rather than thebenzene ring in methylbenzene?(a) Chlorine in the presence of uv light(b) CH3Cl in the presence of AlCl3(c) CH3COCl in the presence of AlCl3(d) Hydrogen in the presence of nickel

Description : Which of the following reagents will react with methyl group rather than the benzene ring in methylbenzene? (a) Chlorine in the presence of uv light (b) CH3Cl in the presence of AlCl3 (c) CH3COCl in the presence of AlCl3 (d) Hydrogen in the presence of nickel

Last Answer : Chlorine in the presence of uv light

Which of the following is NOT a carcinogen? a. Genetic factors b. UV light c. Certain chemicals d. X rays

Description : Which of the following is NOT a carcinogen? a. Genetic factors b. UV light c. Certain chemicals d. X rays

Last Answer : a. Genetic factors

How many monochlorinated isomers would result from the reaction of chlorine with n-butane in the presence of UV light? (a) 2 (b) 4(c) 6 (d) 8

Description : How many monochlorinated isomers would result from the reaction of chlorine with n-butane in the presence of UV light? (a) 2 (b) 4 (c) 6 (d) 8

Last Answer : 2

Which of the following are examples of mutagens? a. detergent b. UV light c. fertilizer d. none of the above are correct

Description : Which of the following are examples of mutagens? a. detergent b. UV light c. fertilizer d. none of the above are correct

Last Answer : b. UV light

Excision repair would correct DNA damage caused by a. Antibiotics. b. UV Light. c. A Chemical Mutagen. d. A Dna Replication Error.

Description : Excision repair would correct DNA damage caused by a. Antibiotics. b. UV Light. c. A Chemical Mutagen. d. A Dna Replication Error.

Last Answer : b. UV Light.

What needs to come into consideration when using UV light to sterilize? a. It Needs Direct Exposure b. It Can Cause Skin Cancer c. It May Not Be Effective Against All Kinds Of Endospores d. A-C Are Correct

Description : What needs to come into consideration when using UV light to sterilize? a. It Needs Direct Exposure b. It Can Cause Skin Cancer c. It May Not Be Effective Against All Kinds Of Endospores d. A-C Are Correct

Last Answer : d. A-C Are Correct