BIOLOGY CH2 PDF Past Paper

BIOLOGY CH2 Q1: What are the building blocks of ATP A. Adenine, deoxyribose and 3 phosphate groups B. Adenosine and 3 phosphate groups C. Adenosine, ribose and 3 phosphate groups D. Adenosine diphosphate and 3 phosphate groups Q2: Although Ahmad takes vitamin K supplements regularly, his blood sti...

BIOLOGY CH2 Q1: What are the building blocks of ATP A. Adenine, deoxyribose and 3 phosphate groups B. Adenosine and 3 phosphate groups C. Adenosine, ribose and 3 phosphate groups D. Adenosine diphosphate and 3 phosphate groups Q2: Although Ahmad takes vitamin K supplements regularly, his blood still shows low absorption. This could be the result of low intake of which of the following A.Proteins B.Triglycerides C.Cholesterol D.Carbohydrates Q3: A person who is lactose intolerant cannot break milk sugar into which components A.Glucose+ glucose B.Glucose + fructose C.Glucose + galactose D.Galactose + galactose Q4: Ribosomes have the ability to link amino acids to form proteins. What is this process called A.Phosphorylation B.Catabolism C.Hydrolysis D.Dehydration synthesis Q5: Analysis of an unknown molecule reveals it is composed of more than one phosphate group, a ribose sugar and a nitrogenous base What molecule could this be A.RNA b- Phospholipid c- DNA d- ATP Q6: Which one of the following forms a bilayer structure that is found in cell membranes A.triglycerides B.saturated fats C.cholesterol D.phospholipids Q7: Molecules of life include which one of the following A.water, proteins, lipids, nucleic acids, carbohydrates B.proteins, saturated fats, monosaccharides, but not polysaccharides C.lipids and proteins only D.any non-carbon base molecule Q8: Muscle cells require more energy than most other cells in order to function. Therefore, muscle cells would be expected to have more ___ and ___ than most other animal cells A.glucose; nuclei B.ribosomes; glycogen C.mitochondria; starch D.glycogen; mitochondria Q9: Sucrose is a disaccharide made up of which one of the following sugars A.glucose and glucose B.maltose and glucose C.starch and glycogen D.glucose and fructose Q10: Which one of the following statements accurately describes hydrolysis reactions in biological systems A.Hydrolysis reactions generally occur for the purpose of energy storage B.Hydrolysis reactions are spontaneous and don't require catalysis by enzymes C.Hydrolysis reactions enable small molecules to be joined to form larger molecules D.Hydrolysis reactions enable the breakdown of food molecules during digestion Q11: What is the primary component of the basement membrane A. phospholipids B. protein C. cholesterol D. lipids Q12: the main component of the plasma mamebrane A.phospholipid B.cholesrtol Q13: What's the main basic unit of biological membranes A. cholesterol B. phospholipids C. proteins D. carbohydrates Q14: Proteins are composed of A. saccharine B. amino acids C. fatty acids D. nucleic acids Q15: Polymers like lipids, carbohydrates and protein are synthesized by their monomers A. release of carbon dioxide from the reaction B. addition of water from the reaction C. addition of carbon dioxide to the monomers D. remove water in the reaction Q16: A cancer patient is given medicine that inhibits the function of the nucleolus, what is the effect on the cell A. inhibition of lipid synthesis B. inhibition of protein synthesis C. inhibition of carbohydrate synthesis D. increase the production of ribosomal RNA Q17: Which is NOT a part for the plasma membrane’s fluid mosaic characteristic A. Phospholipids B. DNA C. Cholesterol D. Proteins Q18: What type of carbohydrate is sucrose A. monosaccharide B. polysaccharide C. oligosaccharide D. disaccharide Q19: The molecules of O2 and CO2 can easily pass through the plasma membrane because A. they’re small and polar B. they’re small and nonpolar C. they’re charged particles D. they have a high concentration Q20: Which component is responsible for the plasma membranes mechanical strength and balance between rigidity and flexibility A. phospholipids B. cholesterol C. proteins D. enzymes Q21: The structural unit of the plasma membrane is A. phospholipids B. proteins C. cholesterol D. carbohydrates Q22: What is the primary function of pinocytosis? A. Take in fluid B. Take in particles C. Secrete enzymes D. Regulate temperature Q23: What best describes the nature of the heads of phospholipids in the lipid bilayer? A. Water soluble B. Hydrophobic C. Gaseous D. Electrically charged Q24: In addition to water and proteins, what major component is found in the ground substance? A. Polysaccharides B. Lipids C. Nucleic acids D. Amino acids Q25: What is the name of the process that converts disaccharides into monosaccharides? A. Hydrolysis B. Catabolism C. Photosynthesis D. Polymerization Q26: What are the main components of the plasma membrane? A. Lipids, Proteins, Carbohydrates B. Nucleic acids, Enzymes, Lipids C. Polysaccharides, Nucleotides, Proteins D. Amino acids, Water, Gases Q27: Nucleotides are formed from which of the following A. Nitrogenous base, pentose sugar and two phosphate groups B. Nitrogenous base, hexose sugar and two phosphate groups C. Nitrogenous base, pentose sugar and one phosphate group D. Nitrogenous base, hexose sugar and one phosphate group Q28: A peptide bond is formed between which of the following A. Phosphate group of one nucleotide and hydroxy group of another nucleotide B. Phosphate group of one nucleotide and Phosphate group of another nucleotide C. Amino group of one amino acid and amino group of another amino acid D. Carboxyl group of one amino acid and amino group of another amino acid Q29: Which of the following is a disaccharide of glucose A. Sucrose B. Maltose C. Lactose D. Galactose Q30: Which of the following lipids is composed of four carbon rings A. Triglycerides B. Phospholipids C. Cholesterol D. Fatty acids Q31: Which of the following is found in all prokaryotes and all eukaryotes A. Cell membrane, nucleus and cytoplasm B. Cytoplasm, genetic material and cell wall C. Genetic material, plasma membrane and cytoplasm D. DNA, cytoplasm and mitochondria Q32: The structure that maintains DNA inside the nucleus is the A. nuclear pores B. nuclear membrane C. nucleoplasm D. nucleolus Q33: Specialized cell membrane structures that hold cells together to from tissues are A. recognition proteins B. adhesion proteins C. enzyme proteins D. transportation proteins Q34: The combination of a short chain of sugar and a protein molecule on the plasma membrane is called A. a glycogen B. a glycolipid C. a glycoprotein D. a phosphoprotein Q35: Benedict's solution reacts with monosaccharides and gives a dark blue colour You have four 4 unlabelled solutions containing glucose, fructose, lactose, and galactose. Which ones should turn dark blue when reacted with Benedict's solution A. Glucose, lactose, and fructose B. Glucose, galactose, and fructose C. Galactose, lactose, and fructose D. Galactose, lactose, and glucose Q36: Which of the following is a correct statement about enzymes? A. Speed up chemical reactions B. Slow down chemical reactions C. Have no effect on chemical reactions D. Are not found in living organisms Q37: Nucleotides are compounds of which of the following? A. Pentose - Nitrogenous base - Phosphate group B. Amino acids - Fatty acids - Carbohydrates C. Glycerol - Phosphate group - Hydroxide ion D. Hydrogen - Oxygen - Carbon Q38: Which of the following links two sugars together in a disaccharide? A. Glycosidic bond B. Peptide bond C. Hydrogen bond D. Ionic bond Q39: What is the building block of steroid hormones? A. Cholesterol B. Glucose C. Amino acids D. Nucleotides Q40: Which molecule plays a role in controlling cell membrane fluidity? A. Cholesterol B. Water C. Sodium D. Oxygen Q41: Two test tubes contain two different mixtures. Tube one has a substance found in the skin, while tube two has a substance which is an important component of the environment. What are the substances? A. Keratin and cholesterol B. Hemoglobin and DNA C. Starch and glucose D. Enzymes and hormones Q42: Hydrolysis is used for which of the following? A. Digestion of starches B. Synthesis of DNA C. Formation of disaccharides D. Breakdown of proteins Q43: What is the element that differs between glycogen and ribonucleic acids? A. Nitrogen B. Carbon C. Oxygen D. Hydrogen Q44: Triglycerides are made up during which process? A. Dehydration synthesis B. Fermentation C. Hydrolysis D. Oxidation Q45: An ion researcher studying changes in plasma membrane structure notices that in one experiment, fluidity was drastically decreased, and the membrane became rigid. What was the likely reason for this change? A. Cholesterol B. Water C. DNA D. Enzymes Q46: DNA consists of which of the following? A. Deoxyribose, phosphate, and Guanine B. Ribose, phosphate, and Cytosine C. Adenine, Thymine, and Ribose D. Deoxyribose, phosphate, and Uracil Q47: Which macromolecule can reduce the risk of heart disease and some forms of cancer? A. Cellulose B. Cholesterol C. DNA D. Hemoglobin Q48: How many different amino acids can be involved in the synthesis of proteins? A. 20 B. 4 C. 3 D. 10 Q49: Which part of the lipid bilayer is hydrophilic in the plasma membrane? A. The head B. The tail C. The cholesterol D. The protein Q50: In the lipid bilayer, what are phospholipids made of? A. Glycerol, two fatty acids, and a phosphate group B. Amino acids and nucleotides C. Cellulose and cholesterol D. Ribose and glucose Q51: Which of the following best explains why the plasma membrane is described as fluidity? A. Plasma membrane components can change position B. Plasma membrane is solid and unchanging C. Plasma membrane is made of only lipids D. Plasma membrane is a rigid structure Q52: Which of the following is hydrolysis used for A. Formation of peptide bond between amino acids B. Linking of three fatty acids to a single glycerol molecule C. Formation of glucose from the digestion of starch D. Assembling of DNA from nucleotides Q53: Which of the following is true of glycosidic bonds A. Are used to form amino acids. B. Link amino acids to form protein. C. Link fatty acids to form triglycerides. D. Link monosaccharides to form polysaccharides. Q54: Which of the following is true of anabolic reactions They are A. Hydrolysis reactions. B. Dehydration reactions. C. Energy releasing reactions. D. Breakdown reactions Q55: What is the monomer of antibodies A. Glucose. B. Fatty acid. C. Amino acid. D. Nucleotide. Q56: which of the following cannot be seen by the naked eyes or by light microscope A. Frog egg. B. Glycolipids. C. Heart cells D. Onion cells. Q57: What is the plasma membrane described as mosaic Because A.is composed of many phospholipids. B. has a cholesterol molecule for each phospholipid. C. a mixture of proteins, lipids, and carbohydrates. D. surrounded by a unique glycocalyx. Q58: Which side do the polar heads of phospholipids face A. The cell’s interior B. The extracellular and intracellular fluid C. The interior region of the phospholipid bilayer D. the lipid tails of one phospholipid bilayer Q59: Which of the following makes the plasma membrane less deformable A. Peripheral protein. B. Cell receptors. C. Membrane cholesterol D. Membrane carbohydrates Q60: During a race, why is it safer for marathon runners to take sports drinks which usually contain 8% carbohydrates rather than drinking pure water ? A. Drinking large amount of pure water makes body fluids hypertonic to the cells. B. Drinking large amount of pure water will cause cells to shrink and die. C. Containing carbohydrates makes the sport drinks isotonic to the cells. D. Containing carbohydrates makes the sport drinks have a good taste. 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