Question 13 Which of the following is a neutral subatomic particle? O 1. neutron O 2. proton 3. electron 4. electron and neutron O 5. neutron and proton

Q: In Chapter 1 of Astrobiology, A Very Short Introduction, the author talks about some special…

A: 1) It acts as a stable medium for biochemical processes. Water’s ability to dissolve most…

Q: The brain and spinal cord develop from a longitudinal ectodermal channel called the _____.

A: Brain and the spinal cord consists of the central nervous system of the body and the nervous system…

Q: The components of a cartridge include the bullet/projectile, powder. and primer; anvil primer;…

A: Cartridge is a case or container that holds other substances. Functional bio inks are more…

Q: un an electron-dot symbol of an element, the dots are O only the electrons that will participate in…

A: all atoms have electrons , electrons take part in bond formation . the lewis dot struture is a…

Q: An isotope of an element contains different numbers of O a. electrons Ob.protons from other atoms of…

A: An atom has three major subatomic particles namely- electrons protons and neutrons. Each element has…

Q: The mass number for an isotope is 14. This isotope could be: a carbon atom with 8 neutrons an oxygen…

A: Mass number of an atom is the sum of the number of protons and neutrons in the nucleus of the atom.…

Q: Most fats isolated from animals are and whereas plant oils are fatty acids. O solid, saturated,…

A: Fatty acids are organic acids having hydrocarbon chain that end in a carboxylic group (_COOH). They…

Q: QUESTION 25 When H becones an H+ ion, it: gives away an electron accepts an electron gives away a…

A: The electrons are the main component that is responsible for forming bonds between different atoms.…

Q: Questión 13 Which of the following DNA parts actually refers to a six -membered heterocyclic ring? A…

A: DNA and RNA are macromolecules that make up nucleic acid. DNA (Deoxyribonucleic acid) is a genetic…

Q: QUESTION 38 What is the source of the following ions in the ocean. lons Source Sodium and magnesium…

A: The two ions that are present most often in seawater are chloride and sodium. These two make up over…

Q: Question 44 1 pts Reactants capable of interacting to form products in a chemical reaction must…

A: Activation energy is defined as the minimum amount of extra energy required by a reacting molecule…

Q: Question 8 In water, leftover positive forces on hydrogen attracted to leftover negative forces on…

A: In water, the structure and the charge of the atoms present on it give the ability for the molecules…

Q: Question 4 Based on the line-angle representations pictured below, the compound on the right has a…

A: Standard molar entropy is defined as the entropy content of 1 mole of pure substance at a standard…

Q: Question 5 We can determine the copper(II) ion content of a sample using spectrophotometry. The…

A: Let,x−axisrepresentamountofCu2+.Let,y−axisrepresentabsorbance. Using given table as data points, we…

Q: Reaction A, AG= -7.3 kcal/mol Reaction B, AG = +4.0 kcal/mol. The overall coupled reaction would be…

A: Couple reactions are reactions where the energy is being transferred from one reaction to another…

Q: QUESTION 10 Which of the following information is primarily obtained from infrared spectroscopy? O…

A: Infrared spectroscopy is a type of spectroscopy, in which a molecule and its property detected on…

Q: With the exception of He, elements with two valence electrons will be considered: O Metals…

A: A valence electron is an electron that is associated with an atom, and that can participate in the…

Q: Which of the following is most directly responsible for water's unique properties? A It contains…

A: Question- Which of the following is most directly responsible for water's unique properties? A)- It…

Q: Question 8 Magnesium has 12 protons. How many électrons are in its first energy level? O a. 2 O b. 4…

A: Magnesium is a metal with 12 electrons, 12 protons and 12 neutrons. Neutrons and protons live inside…

Q: QUESTION 25 Which bond in a polypeptide chain has partial double bond character? (C' = carbonyl…

A: the partial double bond character of C–N in the peptide group means that this bond is shorter than…

Q: QUESTION 14 H H >< H H FO OH Which of the following best describes the structure above? A. It is a…

A: Biomolecules are also known as biological molecules. They are produced by the cells of living…

Q: On Earth the equator regions are warmer than the north and south poles because the polar atmosphere…

A: An equator is a imaginary line around the middle of earth or any spherical object like planet, star,…

Q: Question 17 4 pts A reaction that begins spontaneously progressively becomes less spontaneous as the…

A: Answer - P/R increases  so RTln (P/R) is larger.

Q: The difference in chemical structure between cerebrosides and gangliosides is that gangliosides…

A: Cerbroside and ganglioside are sphingolipid derivatives. Gangliosides can act as receptors on the…

Q: If the AG of a reaction was -31.45 kJoules, you would know that: the reaction most likely leads to…

A: ANSWER;-  Correct answer is B. Explain;-  If the ΔG of a reaction was -31.45 k joules, you would…

Q: Question 7 Which of the following is a chemical property? temperature

A: Chemical properties are very much useful in the purification of a compound.

Q: Question 5 Which of the following is a starch? O Chitin O Cellulose O Amylose O Glycogen

A: Starch is a polymer of different carbohydrate sugar molecules that are joined together through…

Q: Given the Lewis structure below: HO H H C C C C CIH There are sigma bonds and pi bonds.

A: Sigma and pi bonds are types of covalent bonds that differ in the overlapping of atomic…

Q: Which of the following statements about peptide bonds is FALSE? The peptide bond is planar. The…

A: A peptide bond refers to the chemical bond that connects two amino acids. It is formed between the…

Q: Question 11 (1 point) The structure shown is NH2 0-P-0- CH2 O: H. H NH2 H. N. H 0=P-0 -CH2 O. N. H.…

A: Deoxyribonucleic acid is a molecule composed of two polynucleotide chains that coil around each…

Q: QUESTION 4 Lipids are hydrophobic molecules and have no charge. If they are loaded into a gel, and…

A: Gel electrophoresis is a technique in molecular biology where different samples are separated based…

Q: One of the buffers that contribute to pH stability in human blood is carbonic acid (H₂CO3). Carbonic…

A: Introduction   The normal pH of blood is 7.4 which is near to neutral and slightly basic.  the…

Q: The hydration shell is usually formed in: O a. Nonpolar compound O b. Frozen water O c. Pure liquid…

A: Hydration shells allow particles to be dispersed evenly in water. Water molecules forming hydration…

Q: Question 1 Endothermic animals such as snakes are often seen "sunning" themselves on a rock to…

A: Endothermic animals such as Snake are often seen sunning themselves on a rock to absorb the heat of…

Q: Which of the following best summarizes the relationship between condensation reactions and…

A: All living cells undergo certain chemical reactions to Work properly, those can be, catabolic…

Q: Question 28 Extraction of lipids from membranes requires: A SDS; B Distilled water. |C Solvents; D…

A: Lipids present in the membrane are of varied nature such as phospholipids, sphingolipids and…

Q: Oxidation and reduction reactions are chemical processes that result in a gain or loss of:

A: Oxidation is the chemical reaction which occurs when the reactive species gains the electrons. This…

Q: QUESTION 45 When can we say that atom has no vacancy, or the atom is full? O a. An atom's outer…

A: Atom is the smallest particles of matter. It can't be destructed further.

Q: The red dotted lines represent O peptide bonds hydrogen bonds O covalent bonds O hydrogen bonds…

A: A motif in protein structure refers to a chain-like biological structure made up of connectivity…

Q: According to the Arrenhius theory, an acid is:   a. a substance that forms hydroxide ions   b. a…

A: Arrhenius theory gives us the concept of acid and base. This theory is given based on the…

Q: Question 5 Which of the following is not common in cells? O Disulfide bonds Oligomers O Protein…

A: In the cell, the proteins are synthesized in the nucleus and transported out to the cytoplasm. These…

Q: QUESTION 4: Batteries are becoming an essential commodity in our lives as a source of energy to…

A: A primary cell is a battery also called as galvanic cell that is designed to be used once and…

Q: Which molecule is a saturated fatty acid?

A: Carboxylic acid with hydrocarbon side chain are fatty acids. They are mostly esterified but can also…

Q: QUESTION 6 On a daily basis, Thomas throws things in the toilet, puts his toys in the trash, and…

A: The objective of the question is to identify the type of reactions, according to Piaget's theory of…

Q: Carbon has several isotopes including 12C and 14C. These isotopes differ in the number of: O a.…

A: When two or more atoms of same element have the same atomic number (number of protons or number of…

Q: ESTION 23 Ithough carbon dioxide contains carbon, it is not considered an "organic" compound because…

A: Carbon is a unique element. The whole of organic chemistry is based on the carbon and it's property…

Q: What type of chemical reaction is shown below? HO Monomer 1 Monomer 2 + он но Monomers linked by…

A: Conjunction/combination reaction: Its is combining reaction where two or more molecules combine or…

Environmental health and hazards

An organism's environment is the environment in which it lives and has an impact on its well-being. The World Health Organization (WHO) defines environmental health as "those aspects of public health, such as quality of life, that are influenced by physical, chemical, biological, social, and psychosocial components in the environment." Environmental health is concerned with both natural and man-made settings in order to enhance public health. Environmental science, occupational medicine, toxicology, and epidemiology are the key subdisciplines of environmental health.