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Biology Ch. 27 Flashcards | Quizlet

Choose the one alternative that best completes the statement or answers the question.40) Which of the following is NOT true of a viroid?A) Cadang-cadang is a viroid disease of the coconut palm.B) Viroids affect mostly plants.C) Its RNA is circular.D) Viroids possess about 300-400 nucleotides.E) Its capsid is quite small. 41) The smooth endoplasmic reticulum functions in synthesis of A) DNA.B) lipids.C) polysaccharides.D) proteins.E) all of the above 42) Kuru is a degenerative disease of the central nervous system believed to be caused by which type of agent?A) protozoanB) bacteriumC) prionD) virusE) viroid 43) Which of the following is an eukaryotic characteristic?A) cell fissionB) little processing of RNAC) 70S ribosomesD) membrane-bound nucleusE) none of the above 44) Lignin is an important component inA) bacterial cell walls.B) plasmodesmata.C) fungal cell walls.D) tight junctions.E) secondary plant cell walls. 45) Which of the following is true of a plant cell?A) Plant cells are often much larger than animal cells.B) Plant cells may contain chloroplasts.C) Only plant cells have a cell membrane.D) Chromosomes are found only in plant cells.E) The plant cell has no cell wall. 46) Which organelle has only a single membrane around it?A) peroxisomeB) nucleusC) chloroplastD) ribosomeE) mitochondrion 47) Which of the following is a phototroph?A) a mushroomB) bacteria growing on decomposing matterC) an earthwormD) a treeE) all of the above 48) Muscle contraction is an example of which of the following types of work?A) heatB) bioluminescenceC) electricalD) concentrationE) mechanical 49) Energy is important to life forms becauseA) it is required to do work.B) it is required to make specific alterations in the cell.C) all life forms require a continuous supply of it.D) both A and BE) choices A, B, and C 50) Which of the following statements is NOT true of the value D?A) D is change in enthalpy.B) D = D + D()C) D is change in heat content.D) A reaction with a positive D value is exothermic.E) In biology, D is basically the same as D. 51) Which of the following is defined as "heat content or total energy content ?"A) enthalpyB) kcal/kJ multiplied by the Keq C) Gibb's free energy D) entropyE) flouresence 52) The statement "Energy is neither created or destroyed" describesA) the first law of thermodynamics.B) the second law of thermodynamics.C) the law of conservation of energy.D) enthalpy.E) both A and C 53) Which of the following types of work is performed when there is a change in the position of a cell or of cell structure?A) mechanicalB) concentrationC) syntheticD) bioluminescentE) electrical

Which of the following statements are true about protein synthesis in prokaryotes

Choose the one alternative that best completes the statement or answers the question.67) Which of the following is NOT a function of membranes?A) delineationB) compartmentalizationC) regulation of transportD) cell-cell communicationE) information storage 68) A means of detecting the presence of specific carbohydrate moieties on glycoproteins isA) photobleaching.B) liposome formation.C) SDS PAGE.D) the freeze fracture technique.E) ferritin conjugated lectins. 69) CholesterolA) destabilizes the cell membrane.B) intercalates between the fatty acid chain within the bilayer.C) is found in abundance in prokaryotic cell membranes.D) increases permeability for small cations.E) all of the above 70) Starting with shredded spinach leaves, you follow a procedure that allows for separation of cellular organelles.

All membrane function in prokaryotes ..

Following in prokaryotes protein statement synthesis true which. 29 Tuesday Jul 2014

_____ d. The following synthetic polynucleotide is synthesized and used as a template for peptide synthesis in a cell-free system from E. coli. Which of the following statements are true about the polypeptide(s) that you expect to be produced?

24) Which of the following is true of transfer RNA?A) It is responsible for correct positioning of amino acids in a polypeptide.B) It serves as the site of protein synthesis.C) It functions in transcription, translation and replication.

atoms in the backbone of the protein

29/11/2012 · Which of the following statements is true about translation in prokaryotes?

Which of the following statements is true of each aminoacyl tRNA that enters the ribosome to participate in protein synthesis
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