Created by Kamran FatehEnvironmental and Biochemistry Quiz Batch 08Environmental and Biochemistry explores the chemical processes in living organisms and their interactions with the environment. This field covers topics like pollution, climate change, metabolism, and biochemical cycles. Understanding these concepts is crucial for sustainability, health, and ecosystem balance. 1 / 45Which of the following is a source of nitrates in water? A) Detergents B) Fertilizers C) Oil spills D) Thermal pollution 2 / 45Riboflavin is also known as: A) Vitamin B1 B) Vitamin B2 C) Vitamin B3 D) Vitamin B6 3 / 45Which parameter measures the oxygen required for organic decomposition in water? A) COD B) BOD C) TDS D) pH 4 / 45The industrial pollutant Cr(VI) is reduced to Cr(III) because: A) Cr(III) is more toxic B) Cr(III) is less toxic C) Cr(VI) is harmless D) Cr(III) is a gas 5 / 45Atom economy in Green Chemistry refers to: A) Wasting atoms B) Maximizing atom usage in products C) Using excess reagents D) Ignoring reaction efficiency 6 / 45Vitamin E is also called: A) Ascorbic acid B) Riboflavin C) Tocopherol D) Thiamine 7 / 45Which amino acid is involved in disulfide bond formation? a) Serine b) Cysteine c) Methionine d) Threonine 8 / 45Myoglobin binds oxygen using a: a) Calcium ion b) Heme group c) Zinc finger d) Phospholipid 9 / 45Which of the following is NOT a principle of Green Chemistry? A) Waste minimization B) Use of renewable feedstocks C) Maximizing chemical derivatives D) Designing safer chemicals 10 / 45Which gas is used by nitrogen-fixing bacteria? A) O 2 B) C O 2 C) N 2 D) H e 11 / 45The β-pleated sheet is an example of: a) Primary structure b) Secondary structure c) Tertiary structure d) Quaternary structure 12 / 45 Which of the following destroys the ozone layer? A) C O 2 B) N 2 C) CFCs D) O 2 13 / 45The BOD level for very clean water is: A) 1 mg/L B) 5 mg/L C) 10 mg/L D) 20 mg/L 14 / 45The main objective of wastewater treatment is to: A) Increase pollution levels B) Remove contaminants for safe disposal/reuse C) Add heavy metals to water D) Reduce water volume 15 / 45The simplest aldose is: a) Glyceraldehyde b) Ribose c) Fructose d) Galactose 16 / 45The protective layer of ozone is found in the: A) Troposphere B) Stratosphere C) Mesosphere D) Thermosphere 17 / 45Denaturation of proteins disrupts: a) Primary structure b) Secondary and tertiary structures c) Only quaternary structure d) Covalent bonds in the backbone 18 / 45Which polysaccharide is branched? a) Amylose b) Cellulose c) Amylopectin d) Chitin 19 / 45Which of the following is a reducing sugar? a) Sucrose b) Lactose c) Trehalose d) Raffinose 20 / 45In sickle cell anemia, the mutation replaces glutamic acid with: a) Valine b) Alanine c) Leucine d) Serine 21 / 45Which of the following is a fat-soluble vitamin? A) Vitamin B1 B) Vitamin B12 C) Vitamin C D) Vitamin D 22 / 45Niacin is another name for: A) Vitamin B3 B) Vitamin B5 C) Vitamin B6 D) Vitamin B1 23 / 45 Which of the following is a renewable feedstock? A) Petroleum B) Agricultural waste C) Coal D) Natural gas 24 / 45Chromium (VI) in leather industries is toxic and can cause: A) Cancer B) Anemia C) Headaches D) Skin rashes 25 / 45Which glycosidic bond is present in maltose? a) α(1→4) b) β(1→4) c) α(1→2) d) β(1→6) 26 / 45The stratosphere is located at a height of: A) 0-10 km B) 20-40 km C) 50-80 km D) 100-150 km 27 / 45The term "BOD" stands for: A) Biological Oxygen Demand B) Basic Oxygen Demand C) Biodegradable Organic Debris D) Biochemical Oxygen Depletion 28 / 45The term "eutrophication" refers to: A) Oxygen depletion due to excessive plant growth B) Increase in water temperature C) Reduction in water pH D) Formation of acid rain 29 / 45Ozone in the stratosphere protects Earth by absorbing: A) Visible light B) Infrared radiation C) UV radiation D) X-rays 30 / 45Which of the following is a greenhouse gas? A) O 2 B) N 2 C) C O 2 D) A r 31 / 45Photochemical smog is also called: A) Reducing smog B) Oxidizing smog C) Industrial smog D) Acid smog 32 / 45The primary component of photochemical smog is: A) SO2 B) O3 C) CO2 D) N2 33 / 45Cellulose is a polymer of: a) α-D-Glucose b) β-D-Glucose c) α-D-Fructose d) β-D-Galactose 34 / 45Which bond is NOT involved in stabilizing the tertiary structure of proteins? a) Hydrogen bonds b) Disulfide bonds c) Glycosidic bonds d) Hydrophobic interactions 35 / 45The primary source of phosphates in water is: A) C O 2 B) Detergents C) O 2 D) N 2 36 / 45Which of the following metals is associated with mine drainage? A) Sodium B) Zinc C) Potassium D) Calcium 37 / 45Vitamin B12 contains which central metal ion? A) Iron B) Copper C) Magnesium D) Cobalt 38 / 45Which of the following is a monosaccharide? a) Sucrose b) Maltose c) Glucose d) Lactose 39 / 45Smog is a combination of: A) Smoke and fog B) Dust and rain C) Gas and vapor D) Snow and fog 40 / 45 Sedimentation techniques are used to remove: A) Dissolved gases B) Suspended solids C) Radioactive waste D) Thermal pollution 41 / 45Deficiency of Vitamin C causes: A) Rickets B) Scurvy C) Pellagra D) Beriberi 42 / 45The pH of pure water is: A) 5 B) 7 C) 9 D) 11 43 / 45Which technique is used to determine protein tertiary structure? a) NMR spectroscopy b) Mass spectrometry c) UV-Vis spectroscopy d) Thin-layer chromatography 44 / 45The term "pyranose" refers to a sugar with a: a) 5-membered ring b) 6-membered ring c) 7-membered ring d) Linear structure 45 / 45D-Glucose and D-Galactose are: a) Anomers b) Epimers c) Enantiomers d) Diastereomers Your score isThe average score is 76% 0% Restart quiz
