Exam 2 Free Essays

BIOS102- 250  Fall  2012  Sample  Second  Exam MULTIPLE  CHOICE. Choose  the  one  alternative  that  best  completes  the  statement  or  answers  the  question. 1) Which  of  the  following  statements  describes  NAD + ? A) In  the  absence  of  NAD + ,  glycolysis  can  still  function. We will write a custom essay sample on Exam 2 or any similar topic only for you Order Now B) NAD+   is  reduced  to  NADH  during  glycolysis,  pyruvate  oxidation,  and  the  citric  acid  cycle. C) NAD+   can  donate  electrons  for  use  in  oxidative  phosphorylation. D) NAD+   has  more  chemical  energy  than  NADH. E) NAD+   is  oxidized  by  the  action  of  hydrogenases. ) During  glycolysis,  when  each  molecule  of  glucose  is  catabolized  to  two  molecules  of  pyruvate,  most  of  the potential  energy  contained  in  glucose  is A) stored  in  the  NADH  produced. B) transferred  directly  to  ATP. C) transferred  to  ADP,  forming  ATP. D) retained  in  the  two  pyruvates. E) used  to  phosphorylate  fructose  to  form  fructose  6 – phosphate. 3) Starting  with  one  molecule  of  glucose,  the  energy – containing  products  of  glycolysis  are A) 6  CO2 ,  3 0  ATP,  and  2  pyruvate. B) 2  NAD+ ,  2  pyruvate,  and  2  ATP. C) 6  CO2 ,  2  ATP,  and  2  pyruvate. D) 2  FADH2 ,  2  pyruvate,  and  4  ATP. E) 2  NADH,  2  pyruvate,  and  2  ATP. ) Why  is  glycolysis  described  as  having  an  investment  phase  and  a  payoff  phase? A) It  uses  stored  ATP  and  then  forms  a  net  increase  in  ATP. B) It  both  splits  molecules  and  assembles  molecules. C) It  uses  glucose  and  generates  pyruvate. D) It  attaches  and  detaches  phosphate  groups. E) It  shifts  molecules  from  cytosol  to  mitochondrion. 5) The  primary  role  of  oxygen  in  cellular  respiration  is  to A) combine  with  lactate,  forming  pyruvate. B) yield  energy  in  the  form  of  ATP  as  it  is  passed  down  the  respiratory  chain. C) act  as  a n  acceptor  for  electrons  and  hydrogen,  forming  water. D) combine  with  carbon,  forming  CO 2 . E) catalyze  the  reactions  of  glycolysis. 6) In  liver  cells,  the  inner  mitochondrial  membranes  are  about  five  times  the  area  of  the  outer  mitochondrial membranes. What  purpose  must  this  serve? A) It  increases  the  surface  for  oxidative  phosphorylation. B) It  allows  for  an  increased  rate  of  glycolysis. C) It  increases  the  surface  for  substrate – level  phosphorylation. D) It  allows  the  liver  cell  to  have  fewer  mitochondria. E) It  allows  for  an  increased  rate  of  the  citric  acid  cycle. 1 7) In  the  absence  of  oxygen,  yeast  cells  can  obtain  energy  by  fermentation,  resulting  in  the  production  of A) ATP,  pyruvate,  and  acetyl  CoA. B) ATP,  CO2 ,  and  lactate. C) ATP,  NADH,  and  pyruvate. D) ATP,  pyruvate,  and  oxygen. E) ATP,  CO2 ,  and  ethanol  (ethyl  alcohol). 8) Phosphofructokinase  is  an  allosteric  enzyme  that  catalyzes  the  conversion  of  fructose  6 – phosphate  to  fructose 1,6- bisphosphate,  an  early  step  of  glycolysis. In  the  presence  of  oxygen,  an  increase  in  the  amount  of  ATP  in  a cell  would  be  expected  to A) inhibit  the  enzyme  and  thus  increase  the  rates  of  glycolysis  and  the  citric  acid  cycle. B) activate  the  enzyme  and  thus  slow  the  rates  of  glycolysis  and  the  citric  acid  cycle. C) inhibit  the  enzyme  and  thus  slow  the  rates  of  glycolysis  and  the  citric  acid  cycle. D) inhibit  the  enzyme  and  thus  increase  the  rate  of  glycolysis  and  the  concentra tion  of  citrate. E) activate  the  enzyme  and  increase  the  rates  of  glycolysis  and  the  citric  acid  cycle. 9) Which  of  the  events  listed  below  occurs  in  the  light  reactions  of  photosynthesis? A) Carbon  dioxide  is  incorporated  into  PGA. B) NADP  is  produced. C) Light  is  absorbed  and  funneled  to  reaction – center  chlorophyll  a. D) ATP  is  phosphorylated  to  yield  ADP. E) NADPH  is  reduced  to  NADP + . 10) Which  of  the  following  statements  best  describes  the  relationship  between  photosynthesis  and  respiration? A) Respiration  is  anabolic  and  photosynthesis  is  catabolic. B) ATP  molecules  are  produced  in  photosynthesis  and  used  up  in  respiration. C) Photosynthesis  stores  energy  in  complex  organic  molecules,  whereas  respiration  releases  it. D) Photosynthesis  occurs  only  in  plants  and  respiration  occurs  only  in  animals. E) Respiration  runs  the  biochemical  pathways  of  photosynthesis  in  reverse. 11) In  thylakoids,  protons  travel  through  ATP  synthase  from  the  thylakoid  space  to  the  stroma. Therefore,  the catalytic  ? knobs? of  ATP  synthase  would  be  located A) on  the  ATP  molecules  themselves. B) built  into  the  center  of  the  thylakoid  stack  (granum). C) on  the  pigment  molecules  of  photosystem  I  and  photosystem  II. D) on  the  stromal  side  of  the  membrane. E) on  the  side  facing  the  thylakoid  space. 12) What  is  the  primary  function  of  the  Calvin  cycle? A) use  ATP  to  release  carbon  dioxide B) use  NADPH  to  release  carbon  dioxide C) synthesize  simple  sugars  from  carbon  dioxide D) split  water  and  release  oxygen E) transport  RuBP  out  of  the  chloroplast 2 13) Photorespiration  occurs  when  rubisco  reacts  RuBP  with A) 3 – phosphoglycerate. B) CO 2 . C) O2 . D) glyceraldehyde  3 – phosphate. E) NADPH. 4) Compared  to  C 3   plants,  C 4   plants A) make  a  four- carbon  compound,  oxaloacetate,  which  is  then  delivered  to  the  citric  acid  cycle  in mitochondria. B) have  higher  rates  of  photorespiration. C) can  continue  to  fix  CO 2   even  at  relatively  low  CO2 concentrations  and  high  oxygen  concentrations. D) grow  better  under  cool,  moist  conditions. E) do  not  use  rubisco  for  carbon  fixation. 15) Taxol  is  an  anticancer  drug  extracted  from  the  Pacific  yew  tree. In  animal  cells,  Taxol  disrupts  microtubule formation  by  binding  to  microtubules  and  accelerating  their  assembly  from  the  protein  precursor,  tubulin. Surprisingly,  this  stops  mitosis. Specifically,  Taxol  must  affect A) the  formation  of  the  mitotic  spindle. B) the  S  phase  of  the  cell  cycle. C) formation  of  the  centrioles. D) chromatid  assembly. E) anaphase. 16) Measurements  of  the  amount  of  DNA  per  nucleus  were  taken  on  a  large  number  of  cells  from  a  growing fungus. The  measured  DNA  levels  ranged  from  3  to  6  picograms  per  nucleus. In  which  stage  of  the  cell  cycle did  the  nucleus  contain  6  picograms  of  DNA? A) G1 B) G0 C) M D) S E) G2 17) What  is  a  cleavage  furrow? A) a  ring  of  vesicles  forming  a  cell  plate B) the  metaphase  plate  where  chromosomes  attach  to  the  spindle C) the  separation  of  divided  prokaryotes D) the  space  that  is  created  between  two  chromatids  during  anaphase E) a  groove  in  the  plasma  membrane  between  daughter  nuclei 18) Which  of  the  following  describe(s)  cyclin- dependent  kinase  (Cdk)? A) Cdk  is  present  throughout  the  cell  cycle  and  is  an  enzyme  that  attaches  phosphate  groups  to  other proteins. B) Cdk  is  inactive,  or  ? turned  off,? in  the  presence  of  cyclin. C) Cdk  is  an  enzyme  that  attaches  phosphate  groups  to  other  proteins. D) Cdk  is  inactive,  or  ? turned  off,? in  the  presence  of  cyclin  and  it  is  present  throughout  the  cell  cycle. E) Cdk  is  present  throughout  the  cell  cycle. 3 19) Why  do  neurons  and  some  other  specialized  cells  divide  infrequently? A) They  no  longer  carry  receptors  for  signal  molecules. B) They  no  longer  have  active  nuclei. C) They  have  been  shunted  into  G 0 . D) They  can  no  longer  bind  Cdk  to  cyclin. E) They  show  a  drop  in  MPF  concentration. 20) For  a  chemotherapeutic  drug  to  be  useful  for  treating  cancer  cells,  which  of  the  following  is  most  desirable? A) It  only  attacks  cells  that  are  density  dependent. B) It  interferes  with  cells  entering  G0 . C) It  interferes  with  rapidly  dividing  cells. How to cite Exam 2, Essay examples Exam 2 Free Essays Acct 328  ® Exam 2 Part 1 – 60% Name of Company – Each student can make up a company name Type of business – service company †¢sole proprietorship Chart of Accounts – see below. The numbers correspond to dates in the month of February (Use journal entries only) 1. Initial capital of $100,000 2. We will write a custom essay sample on Exam 2 or any similar topic only for you Order Now Prepaid rent – $19,200 for 2 years 3. Prepaid insurance – $24,000 for 2 years 4. Purchased a desk on account for $500 5. Purchased office supplies for $950 6. Sold 20 bicycles @ $350 each 7. Sold 3 bicycle parts for a total of $450 on account 8. Used $250 worth of office supplies 9. Purchased repair supplies for $600 on account 10. Received $250 in cash from transaction on 2/7/2011 11. Paid cash for transaction on 2/4/11 12. Paid $12,000 for vehicle with a service life of 5 years 13. Purchased $100 worth of office supplies 14. Paid $12, 000 in employee salaries 15. Received $850 cash for services in April 16. Paid $400 cash for repair supplies purchased 2/9/11 February 28, 2011 * Office supplies on hand at month end- $150 * Rent expense for February – refer to transaction #2 above * Insurance expense for February – refer to transaction #3 above * Depreciation expense on vehicle for February – refer to transaction #12 * Repair supplies on hand – $80 Acct. No. Assets 101Cash 102Accounts Receivable 103Prepaid Rent 104Prepaid Insurance 105Office Supplies 106Repairs Supplies 107Vehicle 108 Office Equipment 111 Accumulated Depreciation Liabilities 201Accounts Payable 203Salaries Payable 205Unearned Revenue Revenue 401 Service Revenue Expenses 501Salaries Expense 502Rent Expense 504 Supplie s Expense 505Repairs Supplies Expense 506 Vehicle Expense 514Miscellaneous Expense 616 Depreciation Expense – Vehicle 617 Depreciation Expense – Office Equipment Run the following reports: 1. chart of accounts 2. eneral journal 3. general ledger 4. GL trial balance 5. income statement 6. balance sheet Part 2 – 40% Multiple Choice – Highlight answer and submit this file. 1. A post-closing trial balance will show a. zero balances for all accounts. b. zero balances for balance sheet accounts. c. only balance sheet accounts. d. only income statement accounts 2. The income statement for the year 2010 of Poole Co. contains the following information: Revenues$70,000 Expenses: Wages Expense$45,000 Rent Expense12,000 Advertising Expense6,000 Supplies Expense6,000 Utilities Expense2,500 Insurance Expense 2,000 Total expenses 73,500 Net income (loss)$(3,500) After all closing entries have been posted, the revenue account will have a balance of a. $0. b. $70,000 credit. c. $70,000 debit. d. $3,500 credit. 3. Which of the following would not result in unearned revenue? a. Rent collected in advance from tenants b. Services performed on account c. Sale of season tickets to football games d. Sale of two-year magazine subscriptions 4. The following is selected information from Alpha-Beta-Gamma Corporation for the fiscal year ending October 31, 2010. Cash received from customers$300,000 Revenue earned350,000 Cash paid for expenses170,000 Cash paid for computers on November 1, 2009 that will be used for 3 years (annual depreciation is $16,000)48,000 Expenses incurred, not including any depreciation200,000 Proceeds from a bank loan, part of which was used to pay for the computers100,000 Based on the accrual basis of accounting, what is Alpha-Beta-Gamma Corporation’s net income for the year ending October 31, 2010? a. $114,000 b. $134,000 c. $82,000 d. $150,000 5. Bee-In-The-Bonnet Company purchased office supplies costing $6,000 and debited Office Supplies for the full amount. At the end of the accounting period, a physical count of office supplies revealed $2,400 still on hand. The appropriate adjusting journal entry to be made at the end of the period would be a. Debit Office Supplies Expense, $2,400; Credit Office Supplies, $2,400. b. Debit Office Supplies, $3,600; Credit Office Supplies Expense, $3,600. c. Debit Office Supplies Expense, $3,600; Credit Office Supplies, $3,600. d. Debit Office Supplies, $2,400; Credit Office Supplies Expense, $2,400. . Hercules Company purchased a computer for $4,800 on December 1. It is estimated that annual depreciation on the computer will be $960. If financial statements are to be prepared on December 31, the company should make the following adjusting entry: a. Debit Depreciation Expense, $960; Credit Accumulated Depreciation, $960. b. Debit Depreciation Expense, $80; Credit Accumulated Depreciation, $ 80. c. Debit Depreciation Expense, $3,840; Credit Accumulated Depreciation, $3,840. d. Debit Office Equipment, $4,800; Credit Accumulated Depreciation, $4,800. How to cite Exam 2, Essay examples