Question 1 Hydrolysis is involved in each of the following EXCEPT conversion of DNA to a mixture of four deoxynucleotides conversion of glycogen to glucose conversion of glucose to starch conversion of triacylglycerol to a mixture of fatty acids and glycerol Question 2 Which of the following shows carbohydrates arranged according to increasing number of sugar units glucose glycogen maltose fructose sucrose chitin lactose cellulose galactose ribose galactose starch Question 3 Which of the following DOES NOT support the fluid mosaic model Membrane is composed of various biomolecules with properties affected by temperatures changes Membrane proteins from cells of two different organisms will never be found mixed together in a hybrid cell The presence of cholesterol greatly influences membrane fluidity Phospholipids move laterally within the plane of the membrane Question 4 The graph shows the relative amounts of saturated black bars and unsaturated white bars fatty acid groups in the cell membranes of three different plant types Recall that cholesterol is absent in plant cell membranes Assuming all other membrane components and their amounts are similar for the three plant types which of the following is TRUE Plant B most likely lives in cooler soils compared to A and C Plant C most likely lives in cooler soils compared to A and B Membrane fatty acid composition doesn t have anything to do with plant habitat Plant A most likely lives in cooler soils compared to B and C Question 5 You are trying to identify a cell by looking at it under a powerful microscope You identified the ribosomes nucleus cell wall smooth and rough ER Which of the following could it be a leaf cell from a Bluebonnet plant a cell under the domain archaea a Bacillus species a cell from rat ovary the presence or absence of internal membranes partitioning the cell whether or not ribosomes are present the presence or absence of double stranded DNA the number of cells present i e unicellular vs multicellular Question 6 Which of the following distinguishes a eukaryotic cell from a prokaryotic cell Question 7 The lengths of four different cell types are as follows cell A 0 03 mm cell B 0 0075 cm cell C 15 000 nm and cell D 0 1 m Arrange the cells in order of increasing lengths D C A B B C A D None of these options D A C B B A C D Question 8 Which of the following interactions is involved in forming the primary structure of a protein ionic bond covalent bond hydrophobic interaction hydrogen bond Question 9 What would be the molecular formula for a polymer made from eight glucose C6H12O6 molecules linked together by dehydration reactions C48H80O40 C48H96O48 C48H82O41 C48H110O62 Question 10 The basis for dividing the prokaryotes into two domains is differences in the ability to survive in extreme conditions none of the choices differences in metabolic properties differences in genome sequences Question 11 Because humans lack the enzyme which recognizes 1 4 glycosidic linkages Because starch has a lot of branched regions allowing a greater surface area for easy digestion in humans Because cellulose has a lot of branched regions making it difficult for the enzymes to find the cleavage points for complete digestion in humans Because humans lack the enzyme which recognizes 1 4 glycosidic linkages Which of the following explains why humans can digest starch but not cellulose Question 12 Which of the following statements is FALSE A protein built into a membrane may function as an enzyme Integral proteins may extend only partway into the hydrophobic interior Peripheral proteins may or may not be embedded in the lipid bilayer Carbohydrates can associate with membrane proteins Question 13 Which of the following characteristics is NOT shared by bacteria and archaea absence of nuclear membrane presence of plasma membrane presence of ribosomes identical cell wall composition Refer to the figure below Which of the following statements is TRUE It is highly water soluble because of its strongly polar hydroxyl group This is never found in membranes because it extensively clogs blood vessels and causes diseases in organisms Regardless of temperature changes the presence of this molecule in membranes always reduces membrane fluidity It is considered an amphipathic molecule Question 15 Which of the following does NOT describe a biological membrane It is a collage of proteins embedded in the fluid matrix of the lipid bilayer Its components get transported through vesicles whose outside face becomes continuous with the membrane cytoplasmic face Its protein and lipid components are symmetrically distributed Carbohydrate portion of its glycoproteins are positioned on the extracellular face
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