Visceral arches

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  • Vikas Kumar

    Jan 16th, 2018

What is Splanchnocranium? 1. Area of skull including sensory capsules 2. Are of skull including jaws derived from mandibular arch 3. Area of skull derived from hyoid arch 4. Area of skull including brain box and jaws
  • Sharadindu Biswas May 12th, 2019

    3

Non-chordata related problem

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  • Vikas Kumar

    Oct 13th, 2017

Which one of the following organism is triploblastic? a. Hydra b. Faciola hepatica c. Entamoeba d. Tubipora
  • Sk. Samim Akhtar Jun 2nd, 2018

    C

    Sharadindu Biswas Jun 5th, 2018

    B

    Mainak Majumder Jun 6th, 2018

    c

Model Answer:

Faciola hepatica It belongs to phylum Platyhelminthes. It is triploblastic, acoelomate and having bilateral symmetry.

Fatty acid oxidation

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  • Vikas Kumar

    Oct 9th, 2017

For the activation process of beta oxidation of fatty acid, how many ATP is required? a. 1 b. 2 c. 2.5 d. 1.5
  • Anik Nayek Jun 2nd, 2018

    2

    Sharadindu Biswas Jun 5th, 2018

    B

    Mainak Majumder Jun 6th, 2018

    B

Model Answer:

b. 2ATP

Synanthropy

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  • Vikas Kumar

    Oct 6th, 2017

"Synanthropic" is the term used for:

a) enriching of local flora and fauna with species from other geographical territories;

b) domestic (domesticised) animal;

c) organisms transferred by man from original territories;

d) animals and plants living in close relationship with man.

  • Mainak Majumder Jun 6th, 2018

    D

Model Answer:

d. animals and plants living in close relationship with man

"Synanthrope" is generally an undomesticated organism and especially an animal (such as a mouse, pigeon, or raccoon) that lives in close association with people and benefits from their surroundings and activities

 

Purins & Pyrimidins metabolism

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  • Vikas Kumar

    Oct 5th, 2017

Which of the following contributes nitrogen atoms to both Purine and Pyrimidine? a. Aspartate b. Carbamoyl Phosphate c. CO2 d. Glutamate

Model Answer:

a. Aspartate Nucleotide biosynthesis in the cell can be grouped into two broad classes: (1) de-novo synthesis and (2) synthesis by salvage pathways. I. De-novo synthesis (synthesis from scratch): it is a biochemical pathway in which nucleotides are synthesized new from simple precursor molecules. II. Salvage pathway (recycle pathway): used to recover bases and nucleosides formed during the degradation of RNA and DNA De-novo synthesis of purines: The purine nucleotides of nucleic acids are adenosine 5-monophosphate (AMP; adenylate) and guanosine 5-monophosphate (GMP; guanylate), containing the purine bases adenine and guanine respectively. The first idea about purine nucleotide biosynthesis in the cell was come from the study of John Buchanan (1948) by radioactive tracer studies in birds by analyzing the biochemistry of uric acid (a purine present in the excreta of birds). The detailed biosynthetic pathways of the purine biosynthesis came latter in 1950 primarily by the works of Buchanan and G. Robert Greenberg.

Amino acid related Problem

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  • Vikas Kumar

    Oct 4th, 2017

Which amino acid is a lipotropic factor?

a. Lysine

b. Leucine

c. Tryptophan

d. Methionine

Model Answer:

d. Methionine

Lipotropic factors are components that describe the action of Choline in the prevention and treatment of fatty livers. Lipotropic factors are produced naturally in the body. They are substances that have the ability to remove and prevent fatty deposits, such as Homocysteine, in the body.

Amino acid structure related Problem

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  • Vikas Kumar

    Oct 4th, 2017

The amino acid which contains an indole group is:

a. Histidine

b. Arginine

c. Cystine

d. Tryptophan

  • Sharadindu Biswas Jun 6th, 2018

    D

Model Answer:

d. Tryptophan contains indole ring as a heterocyclic group 

Melatonin vs Serotonin

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  • Vikas Kumar

    Oct 3rd, 2017

The precursor to melatonin is serotonin, a neurotransmitter that itself is derived from the amino acid tryptophan. Within the pineal gland, serotonin is acetylated and then methylated to yield melatonin. Serotonin and melatonin are both hormones that regulate various human functions such as sleep, appetite and mood. Serotonin, which is produced in the body, is known as a neurotransmitter; this means it is responsible for sending messages between nerve cells. Melatonin is a neurotransmitterlike substance that plays a vital role in regulating circadian rhythms, which in turn control sleeping patterns, hormone release and body temperature, among many other human functions. Key Diferences between Melatonin and serotonin: While serotonin has many important functions in the body, it may be most known for its role as a “feel good” hormone. Increased levels of serotonin are associated with feelings of happiness and relaxation. Low serotonin levels, on the other hand, are linked to weakened immune function and depression. Melatonin is most noted for its role as a sleep hormone. It is produced in the pineal gland in the brain when it's dark outside -- thus its nickname, “the hormone of darkness.” Deficiencies in this hormone can cause sleeplessness, among many other side-effects. Disorders: Melatonin is used as a treatment for insomnia, delayed sleep phase syndrome (DSPS), jet lag and insomnia associated with attention deficit-hyperactivity disorder (ADHD). It is also used for other conditions, including chronic fatigue, depression, irritable bowel syndrome and anti-aging, though there is no scientific evidence supporting these uses. Serotonin-affecting compounds are primarily used as treatments for depression. Prescription drugs known as selective serotonin re-uptake inhibitors (SSRIs) stop serotonin from being reabsorbed, which elevates serum serotonin levels and can improve depression symptoms. Too much serotonin can also cause problems. Serotonin syndrome is a life-threatening condition that can occur when more than one drug that affects serotonin levels is ingested.

Fun Quiz

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  • Vikas Kumar

    Sep 28th, 2017

Banned Drug in various sports

DNA related problem

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  • Vikas Kumar

    Sep 27th, 2017

  • Sk. Samim Akhtar Aug 19th, 2018

    A

    Enakshi Saha Jan 7th, 2019

    DNA primase extends primers by adding nucleotides to the 3' end.