Biology Forum › Cell Biology › pls check
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- April 14, 2006 at 4:49 am #4432
kabutoParticipant1. Which is correct regarding catabolic pathway?
A. form complex molecule from simple molecule
B. supply ATP to anabolic pathway
C. endergonic reaction that degrade complex molecule to simple molecule
D. spontaneous and do not require enzyme
E. an example is forming glycogen from glucoseMy answer: D
2. Which of the following thermodynamic changes occur when amino acid is converted to protein?
A. +deltaH, -deltaS, +deltaG
B. +deltaH, -deltaS, -deltaG
C. +deltaH, +deltaS, +deltaG
D. -deltaH, -deltaS, +deltaG
E. -deltaH, +deltaS, +deltaGMy answer: A
3. Choose the enzyme that displace electron from organic molecule during respiration?
A. decarboxylase
B. ATP synthase
C. Deaminase
D. Dehydrogenase
E. PhosphofructokinaseMy answer: D
4. Starting from 1 molecule of acetyl CoA, the maximum number of ATP that can be generated from substrate level phosphorylation is
A. 1
B. 2
C. 11
D. 12
E. more than 20My answer: D
5. Fermentation do not produce as much energy as aerobic respiration because
A. fermentation do not occur in specific membrane bound organelle
B. pyruvate can still be reduced to form energy
C. fermentation occur in mitochondria
D. during fermentation, ATP is generated by oxidative phosphorylation
E. NAD+ is regenerated during alcohol/lactate formation without going to electron transfer chainMy answer: E
- April 14, 2006 at 6:13 am #460262810712Participant
I’ve given a try-
1.A the definition of catabolism.
2. Ans. is other than B & E. IN the presence of GTP & all the process has -deltaG & the original AA to Prot reaction has been combined with the GTP hydrolysis as its individual deltaG is positive. MOre than that for deltaG to be positive u can’t have -deltaH along with +deltaS. I’m seeing for more info.
3.D, same as u.
4.A, substrate level produces one per Acetyl-CoA…surely one of us is commiting a blunder!
5.B, seems to be the main cause…Correct me whereever.
hrushikesh
- April 14, 2006 at 11:49 am #46038kiekyonParticipantquote 2810712:I’ve given a try-
1.A the definition of catabolism.
catabolic=(Science: biochemistry) Of or pertaining to catabolism; as, catabolic processes, which give rise to substances (catastates) of decreasing complexity and increasing stability.
- April 15, 2006 at 2:03 pm #461392810712Participantquote kiekyon:quote 2810712:I’ve given a try-
1.A the definition of catabolism.
catabolic=(Science: biochemistry) Of or pertaining to catabolism; as, catabolic processes, which give rise to substances (catastates) of decreasing complexity and increasing stability.
help me , i’m a bit confused here.
sugar formation is catabolism, so my ans is correct no?
hrushikesh - April 15, 2006 at 6:43 pm #46166mithParticipant
No…the answer would be C. complex->simple such as when proteins are converted to aminos.
- April 16, 2006 at 1:17 pm #46258kiekyonParticipantquote mithrilhack:No…the answer would be C. complex->simple such as when proteins are converted to aminos.
that is correct but note that the full sentence for c says
endergonic reaction that degrade complex molecule to simple molecule
that is wrong 😡
- April 16, 2006 at 1:23 pm #46259kiekyonParticipant
for Q2
deltaG = delta H -T delta S
when amino acid is converted to protein,
delta G increase because this is anabolic reaction,
so, delta H increase and delta S decreaseQ4 produce 1 atp
Q5 b
- April 16, 2006 at 2:35 pm #46266mithParticipant
ooh gotcha 🙂
- April 18, 2006 at 3:21 pm #466432810712Participant
OH! sugar formation isn’t catabolism, sorry but if the answer is see then no catabolic process[ eg. respiration reactions] should require enzymes…they are spontaneous, but they still require enzymes to achieve the time deadline.
hrushikesh
- April 19, 2006 at 3:11 am #46725kabutoParticipant
so, only B is left,
catabolic pathway
B. supply ATP to anabolic pathwayam i right? 🙄
- April 19, 2006 at 2:49 pm #467722810712Participant
I see both A & C correct! Please tell me what is wrong with A?
🙄—————————————————————-
Confuse urself with the universe & u’ll find the universe… confused!hrushikesh
- April 21, 2006 at 8:49 am #46953kiekyonParticipant
it’s the other way round.
- April 21, 2006 at 9:12 am #46957sdekivitParticipant
A is wrong: catabolism degrades complex marcomolecules to gain energy.
B is correct: energy from catabolism is used for anabolism (making complex macromolecules)
C is wrong: catabolism is usually exergonic
D is wrong: enzymes are required
E is wrong: forming glycogen out of glucose is anabolism. catabolism would be the degradation of glycogen in order to create energy (anabolism is store energy)
- April 21, 2006 at 9:19 am #46958kabutoParticipant
hmm, thanx again 😀
- April 23, 2006 at 6:57 am #470992810712Participant
sorry , i often confuse in cata & ana… 😳
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