help m with these q's plzz

[deepa k]

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plzz help m with these.. v urgent...
1] which of the foll enzymes seals nicks in DNA?
ligases
DNA polymerase
exonucleases
2] sol A has ph 7,sol B ph 6.both hv equal vol.which of the accurate is accurate?
a.A has 1/10 as many hydrogen ions as B
b.A has 7/6 of the hydrogen ion conc of B
c.A has 6/7 of the hydrogen ion conc of B
3] cushing syndrome is characterised by each except
a. inc protein anabolism
b. inc androgen level
c. hyperkalaemia

 

[MoonSTRuK]

Here are the answers...

1. Ligases
3. Hyperkalemia


Not sure bout stem no.2 though...

 

[MoonSTRuK]

The answer to stem no.2 is most probably "C", not sure though! Someone please rectify me if i am wrong.

 

[confused tooth]

plzz help m with these.. v urgent...
1] which of the foll enzymes seals nicks in DNA?
ligases
DNA polymerase
exonucleases
2] sol A has ph 7,sol B ph 6.both hv equal vol.which of the accurate is accurate?
a.A has 1/10 as many hydrogen ions as B
b.A has 7/6 of the hydrogen ion conc of B
c.A has 6/7 of the hydrogen ion conc of B
3] cushing syndrome is characterised by each except
a. inc protein anabolism
b. inc androgen level
c. hyperkalaemia

 

[deepa k]

1] bronchogenic carcinoma commonly associated with paraneoplastic syndrome??
small cell
adenocarcinoma

2]cigarette smoking etiologically linked with each of the foll cancers except
tat of larynx
stomach
pancreas
esophagus
urinary bladder
[i think all of these cancers are associated with smoking]

3]coagulase production by staph aures is imp in pathogenicity bec it
a. helps 2 establish the typical abscess lesion
b. allow the organism 2 adhere tightly to tissue
c. provide a polysaccharide capsule 2 inhibit phagocytosis
thanks.........

 

[MoonSTRuK]

Answers:-


1. a) Small Cell

3. a) Helps to establish typical abcess lesion

P.S : You need to check the answer choices of stem no.2 again cos all of them are linked to smoking!

 

[deepa k]

for the 3 q .. acc 2 m its the choice2 ie-- allows the organism 2 adhere tightly 2 tissue... plzz confirm this ans

here r few more...........

a] histoplasma capsulatum is an - oppurtunistic inf
- benign self limiting disease?
b] oral sterptococci are - alpha hemolytic
- non-hemolytic?
c] innate immunity is
- allergic reaction 2 insect venom
- alternate pathwey of complement
-classical pathway of complement
-production of Ig G in response 2 insect venom

 

[AbstractDentist]

ans1. bening self limiting
ans2.alpha hemolytic(strep. mutans)
ans3.alternate pathway of complement

 

[meebo]

plzz help m with these.. v urgent...
1] which of the foll enzymes seals nicks in DNA?
ligases
DNA polymerase
exonucleases
2] sol A has ph 7,sol B ph 6.both hv equal vol.which of the accurate is accurate?
a.A has 1/10 as many hydrogen ions as B
b.A has 7/6 of the hydrogen ion conc of B
c.A has 6/7 of the hydrogen ion conc of B
3] cushing syndrome is characterised by each except
a. inc protein anabolism
b. inc androgen level
c. hyperkalaemia

1) answer is ligase
2)i think theres one more choice in question paper that says A has 10 times more hydrogen ion than B.....i felt it was correct since an increase in 1 unit in ph will increase acidity by 10 times(kaplan..says)
3)for this its confusing since in cushing syndrome theres both protien depletion causing msl wasting and also hypokalemia so choice 1 says protien anabolism ....im confusd if its choice 1 or 3
can anyone explain?

 

[meebo]

1] bronchogenic carcinoma commonly associated with paraneoplastic syndrome??
small cell
adenocarcinoma

2]cigarette smoking etiologically linked with each of the foll cancers except
tat of larynx
stomach
pancreas
esophagus
urinary bladder
[i think all of these cancers are associated with smoking]

3]coagulase production by staph aures is imp in pathogenicity bec it
a. helps 2 establish the typical abscess lesion
b. allow the organism 2 adhere tightly to tissue
c. provide a polysaccharide capsule 2 inhibit phagocytosis
thanks.........

answer for 3)c. provide a polysaccharide capsule 2 inhibit phagocytosis
thus the coagulase increase the virulence of bacteria

 

[meebo]

ans1. bening self limiting
ans2.alpha hemolytic(strep. mutans)
ans3.alternate pathway of complement

can u pls explain how innate or natural immunity s related to alternate pathway of complement....😕

 

[mulbery]

3)ur right the answer is protien anabolism,because theres is protein catabolism
correct me if iam wrong

1) answer is ligase
2)i think theres one more choice in question paper that says A has 10 times more hydrogen ion than B.....i felt it was correct since an increase in 1 unit in ph will increase acidity by 10 times(kaplan..says)
3)for this its confusing since in cushing syndrome theres both protien depletion causing msl wasting and also hypokalemia so choice 1 says protien anabolism ....im confusd if its choice 1 or 3
can anyone explain?

 

[positive_doc]

c] innate immunity is

-alternative pathway of complement

The alternative pathway is an ancient pathway of innate immunity. Unlike the classical pathway, the alternative pathway does not require antibody for initiation. Rather, the natural breakdown (low-grade turnover) of plasma C3 via spontaneous cleavage of a highly reactive thioester bond allows such C3 to attach to any nearby host or foreign surface. Regulatory proteins on host cells protect cells by inactivating such fragments.

 

[meebo]

c] innate immunity is

-alternative pathway of complement

The alternative pathway is an ancient pathway of innate immunity. Unlike the classical pathway, the alternative pathway does not require antibody for initiation. Rather, the natural breakdown (low-grade turnover) of plasma C3 via spontaneous cleavage of a highly reactive thioester bond allows such C3 to attach to any nearby host or foreign surface. Regulatory proteins on host cells protect cells by inactivating such fragments.

THANKS A LOT

 

[deepa k]

In the examination , do w hv 2 follow the Universal system of tooth numbering or the FDI system???? i hv seen few questions following the universal system only.....really confused... sm papers directly mention which one 2 follow but few dont?????????

 

[swetha_dentist]

In the examination , do w hv 2 follow the Universal system of tooth numbering or the FDI system???? i hv seen few questions following the universal system only.....really confused... sm papers directly mention which one 2 follow but few dont?????????

I think it is universal can some one clarify???

 

[deepa k]

ya m too think the same...universal system of tooth numbering...

q] monosynaptic jaw closing reflexes might b disrupted by
motor nucleus of v
mesencephalic nucleus of v nerve

 

[mulbery]

it is motor nucleus of V
Ccorrect m eif iam wrong

ya m too think the same...universal system of tooth numbering...

q] monosynaptic jaw closing reflexes might b disrupted by
motor nucleus of v
mesencephalic nucleus of v nerve

 

[GGYY]

during your part I prep, did you ever email your professors a list of questions like you do now here?

 

[composit16]

please explain this

absorption of calcium in small intestine is increased by
1) lowering ph in stomach
2)administeration of parathyroid hormone
i think ans should be 2
but in ada released exam (78) ans is 1
please explain this

 

[chinabuffet]

please explain this

absorption of calcium in small intestine is increased by
1) lowering ph in stomach
2)administeration of parathyroid hormone
i think ans should be 2
but in ada released exam (78) ans is 1
please explain this

The answer would not be 2 because PTH causes release of calcium from the bones causing it to be in excess in the blood and to be excreted more in urine and feces. My GUESS that number 1 is correct is because Calcium (along with Iron and folate) are absorbed in the duodenum. Pepsin functions best at pH 2 and is irreversibly deactivated abouve pH 5; therefore HCL secretion (to keep the ph low) is important.

 

[dentist_112]

The answer would not be 2 because PTH causes release of calcium from the bones causing it to be in excess in the blood and to be excreted more in urine and feces. My GUESS that number 1 is correct is because Calcium (along with Iron and folate) are absorbed in the duodenum. Pepsin functions best at pH 2 and is irreversibly deactivated abouve pH 5; therefore HCL secretion (to keep the ph low) is important.

PTH increases calcium and phosphate absorption frm intestine...
PTH increases cal absorption indirectly by stimulating renal production of 1,25 dihydroxycholecalciferol.....which is the active form of vit D.

 

[chinabuffet]

PTH increases calcium and phosphate absorption frm intestine...
PTH increases cal absorption indirectly by stimulating renal production of 1,25 dihydroxycholecalciferol.....which is the active form of vit D.

You are right.
PTH actions:
Increases bone reabsorption, releasing both Ca and phosphate from bone.
Increases calcium reabsorbtion in the distal nephron, decreasing calcium excretion.
Increases Calcium absorption from the intestine indirectly by stimulating renal production of 1,25 Dihydroxycholecalciferol.

I have no idea why number 1 would be correct. There must be a reason.😕

 

[chinabuffet]

Right I found the answer. Its has more to do with buffers.

An enzyme called pepsin digests protein in our stomachs, but must have an acid environment to function (most of the enzymes in our bodies only function within certain pH ranges). Not all of the food we eat is acidic, and might destroy (or neutralize) the normal stomach pH, thus making the pepsin ineffective, unable to digest dietary protein. To prevent this from happening, the buffers in our stomach keep the pH fairly constant, within a range of about pH 1 to 3. However, antacids such as Tums® or Rolaids® are so “strong” that they overwhelm the person’s stomach’s buffers’ ability to function properly, drastically changing the pH of the stomach contents, and therefore, pepsin’s ability to digest the protein in one’s diet. Calcium, by the way, is absorbed better into one’s body if the stomach contents are acidic, thus antacids also interfere with our bodies’ ability to properly absorb calcium. To properly absorb dietary calcium, it should be consumed along with acidic or slightly acidic substances (such as milk or orange juice), and not mixed in with antacids.

Now the question is why number 2 is wrong.😕

 

[composit16]

thanks chinabuffet and dentist_112 for your reply

i have one more doubt
where is ADH produced
1 post pitu
2 hypothalmus
acc to decks and kaplan ans should be 2
but in ada paper ans is 1

 

[chinabuffet]

The answer should definately be Hypothalamus. ADH is produced in the supraoptic nucleus and paraventricular nucleus of the hypothalamus and passed on to the posterior pituitary. No doubt on that one.

 

[composit16]

thanks chinabuffet

 

[meebo]

1] bronchogenic carcinoma commonly associated with paraneoplastic syndrome??
small cell
adenocarcinoma

2]cigarette smoking etiologically linked with each of the foll cancers except
tat of larynx
stomach
pancreas
esophagus
urinary bladder
[i think all of these cancers are associated with smoking]

3]coagulase production by staph aures is imp in pathogenicity bec it
a. helps 2 establish the typical abscess lesion
b. allow the organism 2 adhere tightly to tissue
c. provide a polysaccharide capsule 2 inhibit phagocytosis
thanks.........

2.stomach cancer is not associated wid smoking
its etiology are nitrosamine intake,achlorhydria,chronic gastritis(both type a&b)
it took lot of time to find proper ans for this....
one more information
in lung bronchioalveolar carcinoma is not related to smoking
hope it helps

 

[meebo]

thanks chinabuffet and dentist_112 for your reply

i have one more doubt
where is ADH produced
1 post pitu
2 hypothalmus
acc to decks and kaplan ans should be 2
but in ada paper ans is 1

its produced in hypothalamus...stored and released from posterior pituitary