29) Why or how does the additional mitochondrial content in slow twitch muscle fiber enhance its abilitv to metabolize fats for energy? 9ft" question is fundamentally wrong: all muscle has the pame mitochondrial content Q)mitochondria can metabolize products of fat for energy; more mitochondria means-more capacity for breakdown of fat for energy c) mitochondrial enrymes are effective in inhibiting storage of fat d) mitochondria can shunt fats to other cells that are effrcient at fat metabolism e) the question is fundamentally wrong: muscle cells do not have mitochondria 30) How does calcium aid in the contraction of muscle? a) the calcium ion forms a bridge between actin and myosin b) the calcium ion changes the pH of the cell, leading to changes in protein conformation (resulting in muscle contraction) c) calcium is required for propagation of the nerve signal to the muscle @ calcium helps remove tropomyosin from the actin binding site e) itjust needs to be there 31) A ng5ly transcribed molecule of mRNA is most similar to @the non-template strand of DNA (except it contains uracil, not thymine)p the non-template strand of DNA (except it contains thymine, not uracil) 1@the template strand of DNA (except it contains uracil, not thymine) d) the template strand of DNA (except it contains thymine, not uracil) e) IRNA 32) The sarcoplasmic reticulum is a modification of which organelle? ;) Golgi reticulata \@ndoplasmic reticulumc) ribosorne d) cell membrane e) sarcomere 33) Transcription factors come together to form an initiation complex that is necessary for Q initiation of DNA replication @bndingof RNA polymerase to DNAt) assembly of ribosomal subunits into a ribosome d) synthesis of protein in the ribosome 34) What is the ribosome made out ofl a) a biological membrane surrounding an en4yme-filled vacuole b) DNA and rRNA @nNe and proteinld) rRNA and lipid e) carbohydrate, rRNA, protein 35) Which of the following is true of myosin? a) it is a filament of actin monomers @, ir the thick filament of muscle that also has enzymatic activityc) it is nervous tissue d) it is the thick filament of muscle having no enzymatic activity e) none ofthe above
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