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You Are On Multi Choice Question Bank SET 444
22201. The peptide, Val-Lys-Glu-Met-Ser-Trp-Arg-Ala, was digested with cyanogen bromide (CNBr) to produce:
(A): Val-Lys + Glu-Met-Ser + Trp-Arg-Ala (B): Val-Lys-Glu-Met-Ser-Trp + Arg-Ala (C): Val-Lys-Glu-Met + Ser-Trp-Arg-Ala (D): Val-Lys-Glu + Met-Ser-Trp-Arg-Ala
22202. I have been waiting for the bus ............2 o"clock.
(A): for (B): since (C): from (D): in
22203. Something that calms the nerves.
(A): stimulant (B): stagnate (C): sedative (D): astringent
22204. Study well, lest ...........
(A): you will fail (B): you must fail (C): you should fail (D): you can fail
22205. "A stitch in time saves –––––"
(A): many (B): some (C): nine (D): hundred
22206. It’s Mr Smith, _____?
(A): is not it (B): isn’t he (C): isn’t it (D): is it
22207. During cellular respiration, most of the ATP made, is generated by
(A): oxidative phosphorylation (B): photophosphorylation (C): glycolysis (D): substrate-level phosphorylation
22208. Important function of cholesterol is to
(A): modulate fluidity (B): enhance blood circulation (C): prevent bile salts formation (D): None of these
22209. To stop ATP synthesis which chemical is generally used?
(A): DNSA (B): 2,4 dinitrophenol (C): DDT (D): None of the chemical can stop ATP synthesis
22210. The enzymes of the TCA cycle in a eukaryotic cell are located in the
(A): nucleus (B): mitochondria (C): plasma membrane (D): lysosomal bodies
22211. Citric acid cycle occurs in
(A): cytoplasm (B): mitochondria (C): endoplasmic reticulum (D): golgi bodies
22212. Most multi-cellular organisms obtain energy for the synthesis of ATP during oxidative phosphorylation from
(A): high energy phosphate compounds (B): a proton gradient across the inner mitochondrial membrane (C): a proton gradient across the cell membrane (D): a proton gradient across the outer mitochondrial membrane
22213. Standard redox potential for a substance is measured under standard condition and is expressed as
(A): mili-Ampere (B): Volt (C): without unit (D): Ohm
22214. Most of the enzymes of the citric acid cycle in a eukaryotic cell are located in the
(A): inner mitochondrial membrane (B): cytosol (C): mitochondrial matrix (D): intermembrane space
22215. A positive redox potential means substance has
(A): lower affinity for electron (B): higher affinity for electron (C): lower affinity for proton (D): higher affinity for proton
22216. The end product of glycolysis is pyruvate, which enters the citric acid cycle after being converted to
(A): acetic acid (B): acetyl-CoA (C): acetaldehyde (D): none of these
22217. Energy that is released from glucose during respiration but not transferred to ATP bonds can be detected as
(A): CO2 (B): AMP (C): ADP (D): heat
22218. Which of the following is involved in energy production?
(A): Generation of proton gradients across membranes (B): Transport of electrons on organic molecules (C): Conversion of compounds with high energy to those of low energy (D): All of the above
22219. Which of the following enzyme does not take part in the TCA cycle?
(A): Citrate synthase (B): Iso-citrate dehydrogenase (C): Pyruvate dehydrogenase (D): Malate dehydrogenase
22220. The first intermediate in TCA cycle is
(A): succinate (B): fumerate (C): citrate (D): malate
22221. Cholesterol can be synthesized de novo in
(A): pancreas (B): intestine (C): liver (D): cell membrane
22222. Which one of the following is not the intermediate of Kreb's cycle?
(A): Isocitrate (B): Succinate (C): Fumarate (D): Stearate
22223. Which one is not the main protein in electron transport chain?
(A): NADH dehydrogenase (B): Cytochrome bc1 complex (C): Cytochrome oxidase (D): Citrate synthease
22224. How many ATPs are produced during citric acid cycle?
(A): 10 (B): 13 (C): 12 (D): 8
22225. The FADH2 and NADH produced by the oxidation of one acetyl-CoA results in the synthesis of about-
(A): 3 ATPs (B): 6 ATPs (C): 11 ATPs (D): 15 ATPs
22226. In eukaryotes, electron transport occurs in
(A): membranes and mitochondria (B): endoplasmic reticulum (C): cytoplasm (D): all of the above
22227. The catabolism of sugars and fatty acids is similar because
(A): both of these compounds are funnelled through the TC A/citric acid cycle (B): both of these compounds generate redox energy during catabolism (C): both of these compounds generate chemical energy during catabolism (D): all of the above
22228. How many molecules of ATPs are synthesized per NADH oxidation?
(A): 2 (B): 1 (C): 3 (D): 4
22229. Why is the TCA cycle the central pathway of metabolism of the cell?
(A): It occurs in the center of the cell (B): Its intermediates are commonly used by other metabolic reactions (C): All other metabolic pathways depend upon it (D): None of the above
22230. In what form does the product of glycolysis enter the TCA cycle?
(A): AcetylCoA (B): Pyruvate (C): NADH (D): Glucose
22231. Malate-asparatate shuttle operates in
(A): lungs and liver (B): heart and liver (C): pancreas and liver (D): none of these
22232. Oxidation of a molecule involves
(A): gain of electron (B): loss of electron (C): gain of proton (D): loss of proton
22233. The meaning of euthanasia:
(A): mercy killing (B): murder (C): assassination (D): atrocity
22234. How can I _____ to the post office?
(A): reach (B): get (C): find (D): arrive
22235. After Jack _____ in his notice at the office, his wife ran away with a lawyer.
(A): had handed (B): handing (C): having handed (D): was handing
22236. The child.......... very much since 1 last saw her
(A): has grown (B): is growing (C): grows (D): grew
22237. Can I pay .. credit card?
(A): by (B): on (C): about (D): with
22238. The unfolding of regular secondary structure causes
(A): little increase in the entropy of protein (B): large decrease in the entropy of the protein (C): no change in the entropy of the protein (D): large increase in the entropy of the protein
22239. During the unfolding reaction of a helix, breakage of each hydrogen bond requires about 2kJ/mol. This implies hydrogen bonds are
(A): much stronger in proteins than in water (B): not reformed with water (C): slightly weaker in proteins than in water (D): slightly stronger in proteins than in water
22240. If the enthalpy change for a reaction is zero, ΔG° is equal to
(A): TΔS° (B): -TΔS° (C): -ΔH° (D): lnKeq
22241. Reactions that have positive standard free energy changes (ΔGo> 0) can be made to occur in cells by
(A): coupling them with exergonic reactions via a common intermediate (B): manipulating the concentrations of products and reactants such that G/<0 (C): coupling them to the hydrolysis of ATP (D): all of the above
22242. The Standard Gibb's free energy, ΔG°, is
(A): the residual energy present in the reactants at equilibrium (B): the residual energy present in the products at equilibrium (C): the difference in the residual energy of reactants and products at equilibrium (D): the energy required to convert one mole of reactants to one mole of products
22243. If the Standard Gibb's free energy, ΔG°, for a reaction is positive then
(A): the products will be favored (B): the reactants will be favored (C): the concentration of the reactants and products will be equal (D): all of the reactant will be converted to product
22244. No body answered it, ------- ?
(A): did he (B): didn"t he (C): didn"t they (D): did they
22245. Enhancers are regions that
(A): bind RNA polymerase (B): are adjacent to the TATA box (C): are CAT box binding proteins (D): modulate transcription
22246. Transcription by E. coli polymerase occurs in
(A): four phases known as initiation, propagation, elongation and termination (B): three phases known as initiation, elongation and termination (C): two phases known as initiation and termination (D): none of the above
22247. Which of the following is necessary for transcription to occur?
(A): DNA molecule (B): RNA polymerase (C): DNA polymerase (D): Both DNA & RNA polymerase
22248. Multiple copies of 5S genes, located at a chromosomal site distinct from the other rRNA genes
(A): are transcribed by rRNA polymerase III and the 5S rRNA (B): are transcribed by rRNA polymerase II (C): are transcribed by rRNA polymerase I and the 5S rRNA (D): are transcribed by DNA polymerase I
22249. Each tRNA molecule has a cloverleaf secondary structure consisting of
(A): three stem loops (B): two stem loops (C): four stem loops (D): either or
22250. What is a promoter?
(A): A specific sequence of DNA to which a catabolic repressor binds (B): A specific sequence of DNA to which RNA polymerase binds (C): A specific DNA sequence to which a restriction endonuclease binds (D): None of the above
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