Explain why cadmium and mercury are toxic to most organisms.

Q: stable isotope in studies in microbial ecology?

A: Isotopes of an element which are found naturally and which do not gets decayed radioactively stable…

Q: What forms of mercury are most toxic to organisms?

A: Mercury is a toxic element present naturally and it is an introduced contaminant in the environment.…

Q: Typical frequencies for several types of electromagnetic radiation are given below. Calculate the…

A: The waves of electromagnetic filed causes electromagnetic radiations. These waves propagate through…

Q: Copper corrodes in moist air to produce a green layer on its surface, Explain the cause with…

A: Metals are defined as the natural inorganic compounds present in the earth's crust, in which they…

Q: List the four most abundant elements in the human body.

A: There are 118 elements found on the earth each with specific physical and chemical characteristics.…

Q: At high concentration which oxides are poisonous?

A: The major contributors of the air pollution are nitrogen oxides. They have role in the formation of…

Q: A 10.00 mg sample of technetium-93 (92.91024898 u) is used to heat 125.4 g o

A:

Q: Element X is a major element in the human body and also known as electrolytes. As a biomedical…

A: Electrolytes are particles that carry a positive or negative charge. These are essential minerals…

Q: Chain breaking antioxidants are

A: Chain breaking antioxidants are the molecules which can donate an electron or accept electron from…

Q: enzyme Nitrite reductase has which of the elements as its constituent ?

A: Enzymes facilitate speed up chemical reactions within the human body. They bind to molecules and…

Q: Radioactivity is a phenomenon of the spontaneous emission of: A. protons (alpha particles)…

A: Radioactivity is the physical process of spontaneous atomic nucleic transformations. Mother, or…

Q: What is essential in trace elements?

A: Trace elements are minerals that are present in living tissue in small amounts. Their main function…

Q: Phosphorus-32, a radioisotope used in leukemia therapy, has a half-life of about 14 days.…

A: Given values: Half life of P32 = 14 days

Q: What happens when ionizing radiation strikes an atom in a chemical compound?

A: Ionising radiation is radiation, travelling as a particle or electromagnetic wave, that carries…

Q: How is mercury detoxified by bacteria?

A: The mercury resistance due to the reduction of mercuric to the elemental mercury is distributed…

Q: Elemental gold is being recovered by electrodeposition from a solution with tiny amounts of Au(III).…

A: Gold is recovered by many process like cynide process etc.

Q: Is the total enthalpy (H) of the reactants for an endothermic reaction greater than or less than the…

A: The Heat of reaction or enthalpy of reaction is the change in enthalpy of a chemical reaction that…

Q: How can a nucleus emit an electron during B decay when there are no electrons present in the nucleus…

A: Decomposition of neutron to yield an electron and a protein is called as β emission. This process…

Q: list the types of acute phase reactants .

A: Acute phase reactants are the group of plasma proteins whose concentration increases or decreases In…

Q: Radiation from the sun that heat earth, and can cause skin cancer when in excess are called

A: Radiation from the Sun, which is more popularly known as sunlight, is a mixture of:…

Q: Approximately what amount (in Sv) of short-term exposure to radiation produces noticeable effects in…

A: Uptake of a high level of radiation over a short time may cause symptoms related to radiation…

Q: Why is iodine important for human beings?

A: The trace elements are minerals present in the living tissues in small amounts. The trace elements…

Q: +2 H3N O:

A: The compounds that contain COOH as functional groups are called acids. The compounds that contain…

Q: How to reduce/control chromium pollution?

A: Chromium can affect the air quality through coal manufacturing, which eventally can lead to water or…

Q: Hot air at 50 C does not cause a lethal burn on our skin, but water with the same temperature is…

A: yes its true that Hot air even at 50C can not burn our skin, but water with same temperature can…

Q: What is not valid for aerosols?

A: Aerosols are basically a suspension that is composed of fine solid particles or liquid droplets in…

Q: What characteristic of uranium-235 fission causes a chain reaction?

A: The nuclear fission is a nuclear reaction or a radioactive decay method in which the nucleus of an…

Q: The decay of an isotope element follows a first-order reaction. Assuming that you start with 964 mg…

A: Given Values: The initial amount of isotope element sample = 964 mg The final amount of isotope…

Q: Why is oxygen when unbound to any other material can be toxic to life?

A: Life as we know it takes many diverse forms, from the largest whales to the tiniest unicellular…

Q: As the high-speed electrons knock out electrons and lose their energy when they hit the (+) target,…

A: Introduction Electromagnetic waves are a form of radiation that includes X-rays. X-ray imaging is a…

Q: What are Alu elements? How can they adversely affect human health?

A: An Alu element is a short stretch of DNA originally characterized by the action of the Arthrobacter…

Q: a 139 ng sample of radioactive material has a half life of 4.2 days how many ng of radioactive…

A: GIVEN: The initial mass of radioactive material = 139 ng Half-life =4.2 days Number of half lives= 3…

Q: The half-life of mercury-197 is 64.1 hours. If a patient undergoing a kidney scan is given 5.0 ng of…

A: The half life (t1/2) is defined as that period of time which is needed for one half of a given…

Q: Define the terms below i. Radioisotope ii. Decay series iii. Radioactive decay energy and its units…

A: 1. Radioisotope: It is an unstable form of a chemical element that releases radiation as it breaks…

Q: What organic sulfur compound is most abundant in nature?

A: An organic compound that comprises sulfur is called organosulfur compounds. Organosulfur compounds…

Q: Why do doctors not accept HMO?

A: HMO is an abbreviation for Health Maintenance Organization. HMOs provide insurance coverage for…

Q: Explain the effects of the following changes on reactant and product  concentrations:

A: A chemical reaction is a process that leads to the chemical transformation of one set of chemical…

Q: What are the main biological functions in which chlorine ions participate?

A: The chloride ion is an anion. It is a negatively charged ion and forms by the gaining of an electron…

Q: OCCURS IN WATER WITI 1. cobalt 2. strontium 3. selenium 4. vanadium

A: Osteoarthritis, also known as degenerative joint disease (DJD), is one of the most common type of…

Q: This compound is directly involved in:

A: The given structure is of NADPH. NADPH is reduced form of NADP+.  The major source of NADPH in…

Q: Explain why a physician would use an isotope with a shorter half-life to diagnose or treat patients.

A: Half life of a radioactive isotope is the time it takes in disintegration of one half of its atoms.…

Q: What is the iodine indicator test used for? Describe in detail how iodine works in a reaction and…

A: Iodine indicator test is used for detection of starch. The triiodide form of iodine complexes with…

Modes of Nutrition

It is a biological process of providing or obtaining food that is necessary for growth and health. It includes many physiological processes - absorption, ingestion, assimilation, catabolism, excretion, etc. In biology, the science that deals with nutrition's physiological and chemical processes are called "nutritional science."