Which of tne of the following scientists has not worked in the field of prostaglandins? (A) Voneuler (B) Sultan Karim (C) Andre robet (D) Kendal

Which of tne of the following scientists has not worked in the field of prostaglandins? (A) Voneuler (B) Sultan Karim (C) Andre robet (D) Kendal
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Answer :  D
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Prostaglandins have a common structure based on prostanoic acid which contains carbon atoms: (A) 12 (B) 16 (C) 18 (D) 20

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Prostaglandins are liberated in the circulation by the stimulation of (A) Anterior pituitary glands (B) Posterior pituitary glands (C) Adrenal gland (D) Thyroid gland

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The prostaglandins are synthesized from (A) Arachidonic acid (B) Oleic acid (C) Linoleic acid (D) Linolenic acid

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Prostaglandins decrease all of the following except (A) Gastric acid secretion (B) Blood pressure (C) Uterine contraction (D) Platelet aggregation

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Cyclo-oxygenase is involved in the synthesis of (A) Prostaglandins (B) Thromboxanes (C) Both (A) and (B) (D) None of these

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Prostaglandins stimulate (A) Aggregation of platelets (B) Lipolysis in adipose tissue (C) Bronchodilatation (D) Gastric acid secretion

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Prostaglandins are inactivated by (A) 15-Hydroxyprostaglandin dehydrogenase (B) Cyclo-oxygenase (C) Lipo-oxygenase (D) None of these

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Lipo-oxygenase is required for the synthesis of (A) Prostaglandins (B) Leukotrienes (C) Thromboxanes (D) All of these

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Synthesis of prostaglandins is inhibited by (A) Glucocorticoids (B) Aspirin (C) Indomethacin (D) All of these

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Slow reacting Substance of Anaphylaxis is a mixture of (A) Prostaglandins (B) Prostacyclins (C) Thromboxanes (D) Leukotrienes

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Prostaglandins lower camp in (A) Adipose tissue (B) Lungs (C) Platelets (D) Adenohypophysis

Description : Prostaglandins lower camp in (A) Adipose tissue (B) Lungs (C) Platelets (D) Adenohypophysis

Last Answer : Answer : A

Anti-inflammatory corticosteroids inhibit the synthesis of (A) Leukotrienes (B) Prostaglandins (C) Thromboxanes (D) All of these

Description : Anti-inflammatory corticosteroids inhibit the synthesis of (A) Leukotrienes (B) Prostaglandins (C) Thromboxanes (D) All of these

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All active prostaglandins have at least one double bond between positions (A) 7 and 8 (B) 10 and 11 (C) 13 and 14 (D) 16 and 17

Description : All active prostaglandins have at least one double bond between positions (A) 7 and 8 (B) 10 and 11 (C) 13 and 14 (D) 16 and 17

Last Answer : Answer : A

For synthesis of prostaglandins, the essential fatty acids give rise to a fatty acid containing (A) 12 carbon atoms (B) 16 carbon atoms (C) 20 carbon atoms (D) 24 carbon atoms

Description : For synthesis of prostaglandins, the essential fatty acids give rise to a fatty acid containing (A) 12 carbon atoms (B) 16 carbon atoms (C) 20 carbon atoms (D) 24 carbon atoms

Last Answer : Answer : C

What is the mechanism of action of prostaglandins?

Description : What is the mechanism of action of prostaglandins?

Last Answer : Prostaglandins are local hormones, and function through G-protein coupled receptors In most tissues, PGE increases cAMP level. But in adipose tissue and in renal tubular cells, PGE lowers cAMP level.

How is prostaglandins inactivated?

Description : How is prostaglandins inactivated? 

Last Answer : Prostaglandins have only very short half life, of about 30 seconds. They are inactivated by the 15- hydroxy-prostaglandin-dehydrogenase which converts 15-OH group to keto group.

How prostaglandins are synthesised?

Description : How prostaglandins are synthesised?

Last Answer : The arachidonic acid is released by the action of phospholipase A2 on phospholipids prostaglandin synthesis is catalysed by prostaglandin H synthase (PGHS). It contains two separate enzyme activities, cyclo-oxygenase and peroxidase. 

Prostaglandins are stored in what form?

Description : Prostaglandins are stored in what form?

Last Answer : As precursors, as membrane phospholipids.

Prostaglandins are derived from what substance?

Description : Prostaglandins are derived from what substance?

Last Answer : Prostaglandins are derived from the PUFA. The Series 2 (with two double bonds) are derived from arachidonic acid. All naturally occurring PGs belong to the 2-series.

How prostaglandins are classified?

Description : How prostaglandins are classified?

Last Answer : According to the attachment of different substituent groups to the ring, PGs are named with capital letters such as A, B, E and F. In the same series, depending on number of double bonds on the side chains ... have two double bonds at 13-14 (trans) and 5-6 (cis). This is the most common variety.

Is there any mention in the Quran about reading Durood on Nabi Karim (SAW) ?

Description : Is there any mention in the Quran about reading Durood on Nabi Karim (SAW) ?

Last Answer : It is mentioned in verse 56 of Surah Al-Ahzab of the Holy Quran that the Prophet (peace and blessings of Allaah be upon him) recited darood. Allaah says in the Holy Qur'aan: Verily, Allaah praises ... . However, the best word for reciting darud to the Prophet (peace be upon him) is darud Ibrahim.