تاپیک مرجع سوال های بیوشیمی
پاسخ : تاپیک مرجع سوال های بیوشیمی
بله واقعا مجهول بود !!!
مي توانم كلي سايت و مقاله نشان تان بدهم كه كاتد را مثبت و اند را قطب منفي درنظر مي گيرند !!!!
تازه علت انكه اسم پرتو الكتروني كه بار منفي دارد را "پرتو كاتدي" گذاشتند زيرا جذب قطب مثبت يعني كاتد مي شد !!
اين هم در شيمي سال دوم هست !!!
---- دو نوشته به هم متصل شده است ----
جالب اينجاست كه تا الان هيچ كس متوجه نشد كه من اشتباه سوال را خوانده بودم !!
ميوگلوبين بود نه هموگلوبين !!!!!!!!!!!!!!
:|
بله واقعا مجهول بود !!!
مي توانم كلي سايت و مقاله نشان تان بدهم كه كاتد را مثبت و اند را قطب منفي درنظر مي گيرند !!!!
تازه علت انكه اسم پرتو الكتروني كه بار منفي دارد را "پرتو كاتدي" گذاشتند زيرا جذب قطب مثبت يعني كاتد مي شد !!
اين هم در شيمي سال دوم هست !!!
---- دو نوشته به هم متصل شده است ----
جالب اينجاست كه تا الان هيچ كس متوجه نشد كه من اشتباه سوال را خوانده بودم !!
ميوگلوبين بود نه هموگلوبين !!!!!!!!!!!!!!
:|
- ارسال ها
- 442
- لایک ها
- 571
- امتیاز
- 93
پاسخ : تاپیک مرجع سوال های بیوشیمی
For a battery in a circuit (according to physics convention), we are told that the anode must be negative, because current is flowing to it. We are likewise told the cathode must be positive, because current is flowing from it. The reality is that it is a chemical reaction that generates the emf and there is not actual charge on either electrode. But by convention in physics, the cathode terminal of a battery is assigned a (+) and the anode terminal of a battery is assigned a (-).
For a battery in a circuit (according to physics convention), we are told that the anode must be negative, because current is flowing to it. We are likewise told the cathode must be positive, because current is flowing from it. The reality is that it is a chemical reaction that generates the emf and there is not actual charge on either electrode. But by convention in physics, the cathode terminal of a battery is assigned a (+) and the anode terminal of a battery is assigned a (-).
پاسخ : تاپیک مرجع سوال های بیوشیمی
AP Electrochemistry
---- دو نوشته به هم متصل شده است ----
اون از يه مقاله ديگه (فيزيكي) بود الان صفحه رو بستم !
يكي ديگه دادم !
بازم بخوايد بهتون مي دم !!!!!
AP Electrochemistry
---- دو نوشته به هم متصل شده است ----
اون از يه مقاله ديگه (فيزيكي) بود الان صفحه رو بستم !
يكي ديگه دادم !
بازم بخوايد بهتون مي دم !!!!!
پاسخ : تاپیک مرجع سوال های بیوشیمی
من كه مي دانم جايزه نمي دهيد، پ.خ بهانه هست.
جواب سوال تون :
This charge convention screws people up all of the time. The problem is that the sign convention for a discharging battery (like we deal with in circuits) is different from the plate charges in electrophoresis (which is a charged capacitor).
For a battery in a circuit (according to physics convention), we are told that the anode must be negative, because current is flowing to it. We are likewise told the cathode must be positive, because current is flowing from it. The reality is that it is a chemical reaction that generates the emf and there is not actual charge on either electrode. But by convention in physics, the cathode terminal of a battery is assigned a (+) and the anode terminal of a battery is assigned a (-).
For electrophoresis, the plates of a capacitor are charged as the result of an applied voltage. The electrons flow from the anode (site of oxidation: loss of electrons) to the cathode (site of reduction: gain of electrons), so the anode builds up a (+) charge over time and the cathode builds up a (-) charge over time. The electric field that is created can be filled with a viscous gel so that charged macromolecules can be separated according to their migration rate and/or migration direction through the resistive gel. Cations migrate to the cathode and anions migrate to the anode.
من كه مي دانم جايزه نمي دهيد، پ.خ بهانه هست.
جواب سوال تون :
This charge convention screws people up all of the time. The problem is that the sign convention for a discharging battery (like we deal with in circuits) is different from the plate charges in electrophoresis (which is a charged capacitor).
For a battery in a circuit (according to physics convention), we are told that the anode must be negative, because current is flowing to it. We are likewise told the cathode must be positive, because current is flowing from it. The reality is that it is a chemical reaction that generates the emf and there is not actual charge on either electrode. But by convention in physics, the cathode terminal of a battery is assigned a (+) and the anode terminal of a battery is assigned a (-).
For electrophoresis, the plates of a capacitor are charged as the result of an applied voltage. The electrons flow from the anode (site of oxidation: loss of electrons) to the cathode (site of reduction: gain of electrons), so the anode builds up a (+) charge over time and the cathode builds up a (-) charge over time. The electric field that is created can be filled with a viscous gel so that charged macromolecules can be separated according to their migration rate and/or migration direction through the resistive gel. Cations migrate to the cathode and anions migrate to the anode.
- ارسال ها
- 1,240
- لایک ها
- 2,256
- امتیاز
- 0
پاسخ : تاپیک مرجع سوال های بیوشیمی
Glycolytic pathway regulation involves
A. allosteric stimulation by ADP
B. allosteric inhibition by ATP
C. feedback, or product, inhibition by ATP
D. all of the above
---------------------------
A kinase is an enzyme that
A. removes phosphate groups of substrates
B. uses ATP to add a phosphate group to the substrate
C. uses NADH to change the oxidation state of the substrate
D. removes water from a double bond
--------------------------------------------
The released energy obtained by oxidation of glucose is stored as
A. a concentration gradient across a membrane
B. ADP
C. ATP
D. NAD+
Glycolytic pathway regulation involves
A. allosteric stimulation by ADP
B. allosteric inhibition by ATP
C. feedback, or product, inhibition by ATP
D. all of the above
---------------------------
A kinase is an enzyme that
A. removes phosphate groups of substrates
B. uses ATP to add a phosphate group to the substrate
C. uses NADH to change the oxidation state of the substrate
D. removes water from a double bond
--------------------------------------------
The released energy obtained by oxidation of glucose is stored as
A. a concentration gradient across a membrane
B. ADP
C. ATP
D. NAD+
- ارسال ها
- 442
- لایک ها
- 571
- امتیاز
- 93
- ارسال ها
- 1,240
- لایک ها
- 2,256
- امتیاز
- 0
پاسخ : تاپیک مرجع سوال های بیوشیمی
Glycogen has
A. α-1,4 linkage
B. α-1,6 linkages
C. α-1,4 and α-1,6 linkages
D. α-1,4 and β-1,6 linkage
---------------------------------------------
Glucose from the breakdown of glycogen is obtained in
A. the liver by phosphorolysis
B. the muscles by phosphorolysis
C. the muscles by hydrolysis
D. both (a) and (b)
-------------------------------------
Fructose-2,6-bisphosphate
A. activates fructose-1,6-bisphosphatase
B. activates phosphofructokinase
C. inhibits fructose-1,6-bisphosphatase
D. both (a) and (b)
Glycogen has
A. α-1,4 linkage
B. α-1,6 linkages
C. α-1,4 and α-1,6 linkages
D. α-1,4 and β-1,6 linkage
---------------------------------------------
Glucose from the breakdown of glycogen is obtained in
A. the liver by phosphorolysis
B. the muscles by phosphorolysis
C. the muscles by hydrolysis
D. both (a) and (b)
-------------------------------------
Fructose-2,6-bisphosphate
A. activates fructose-1,6-bisphosphatase
B. activates phosphofructokinase
C. inhibits fructose-1,6-bisphosphatase
D. both (a) and (b)
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