mcq biology

Biology MCQ-03 Biochemistry: Carbohydrates – Part 2 for JRF/NET Life Science Examination


Biochemistry Quizzes

Biology MCQ (Multiple Choice Questions in Life Science)
(Sample/Model/Practice Questions for JRF/NET Life Science Examination, ICMR JRF, DBT JRF, GATE, ICAR NET, PG Entrance)


Biochemistry: Carbohydrates Part 2 (MCQ-03)


1.  The vitreous humor of eye is composed of_______.

a.       Heparin
b.      Hyaluronic acid

c.       Keratan Sulfate
d.      Chondroitin sulfate

2. N-acetyl glucosamine (NAG) and N-acetyl muramic acid (NAM) in peptidoglycan is connected by ____glycosidic linkage.

a.       α 1 – 4
b.      β 1 – 4

c.       α 1 – 2
d.      β 1 – 2

3.  Sulbactam is a ____________.

a.       β-lactam antibiotic
b.      β lactamase

c.       β lactamase inhibitor
d.      A class of penicillin

4.  Which of the following is not a sugar molecule of the O-antigen of gram negative bacteria?

a.       Tyvelose
b.      Abequose

c.       2 keto-3-deoxyoctanoate
d.      Teichoic acid

5.  Glycosidic bond between galactose and glucose in lactose is____.

a.       α 1 – 4
b.      β 1 – 4

c.       α 1 – 2
d.      β 1 – 2

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mcq biology

Biology MCQ-02 Biochemistry: Carbohydrates – Part 1 for JRF/NET Life Science Examination


Biochemistry Quizzes

Biology MCQ (Multiple Choice Questions in Life Science)
(Sample/Model/Practice Questions for JRF/NET Life Science Examination, ICMR JRF, DBT JRF, GATE, ICAR NET, PG Entrance)


Biochemistry: Carbohydrates Part 1 (MCQ-02)


1. The general chemical formula of carbohydrate is

a.       (CH2O)n
b.      (CH2O)2n

c.       (CHO)n
d.      CnH2nO

2. Which of the following is an aldotriose?

a.       Dihydroxyacetone
b.      Glyceraldehyde

c.       Ribulose
d.      Erythrose

3. What is the molecular formula of sucrose?

a.      C12H22O11
b.      C10H20O10

c.       C6H12O6
d.      C12H20O11

4. The glycosidic linkage between glucose molecule in maltose is

a.      β 1 – 4
b.      α 1 – 2

c.       α 1 – 4
d.      β 1 – 2

5. A keto pentose will have _____ sterioisomers.

a.      4
b.      6

c.       8
d.      10

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mcq biology

Biology MCQ-01: ICMR JRF Entrance Exam Model Question Paper-1 with Answer & Explanations

Biology MCQ (Multiple Choice Questions in Life Science)
(Sample/Model/Practice Questions for JRF/NET Life Science Examination, ICMR JRF, DBT JRF, GATE, ICAR NET, PG Entrance)

ICMR JRF Model Question Paper
INDIAN COUNCIL OF MEDICAL RESEARCH


 Model Question Paper 01 (MCQ 01)


New: NET Life Sciences Dec 2015 Question Paper with Detailed Answer key

1. The average size of 70S ribosomes of prokaryotes are:

a.      ~ 200 Å
b.      ~ 250 Å
c.      ~ 290 Å
d.      ~ 303 Å

2. Which of the following is an example for chemolithotroph?

a.       Acidithiobacillus ferrooxidans
b.       Nitrosomonas

c.       Nitrobacter
d.      All of the above

3. Which of the following is an example for denitrifying bacteria?

a.       Nitrosomonas
b.       Nitrobacter

c.       Pseudomonads
d.      All of the above

4. Who introduced the group Archaea for a group of prokaryotes on the basis of phylogenetic analysis of 16S rRNA?

a.       Roger Stanier
b.       Carl Woese

c.       C. B. van Niel
d.      Theodor Escherich

5. Who discovered endoplasmic reticulum?

a.      Keith porter
b.      Konstantin Mereschkowsky

c.      Camillo Golgi
d.      George Emil Palade

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Notification of CSIR JRF NET, Life Science Examination

ICMR JRF Entrance Exam: 2015: Life Sciences: Notification

ICMR (Indian Council of Medical Research) in collaboration with PGIMER, Chandigarh will conduct a national level examination for the award of JRF (Junior Research Fellowship) in Life Sciences/Social Sciences stream on Sunday, July 19 2015 (19/07/2015) at 12 selected centers all over India (Bhopal, Bhubaneswar, Chandigarh, Chennai, Delhi, Kolkata, Mumbai, Hyderabad, Guwahati, Srinagar, Bengaluru and Varanasi).

A total of 150 Fellowships would be awarded among which 120 Fellowships would be awarded for work in the field of bio-medical sciences with emphasis on Life Sciences (microbiology, physiology, molecular biology, genetics, human biology, bioinformatics, biotechnology, biochemistry, biophysics, immunology, Pharmacology, zoology, Environment Science, botany, veterinary sciences, bio-informatics etc.). Thirty Fellowships would be awarded for work with emphasis on Social sciences like psychology, sociology, home science, statistics, anthropology, social work and Health Economics.

Another 100 candidates will be selected for consideration for positions of JRF under various research schemes of ICMR for the duration of that scheme. These JRFs would also be permitted to complete Ph.D. while working in the scheme, if enrolled.  The validity of result will be two years for placement in ICMR funded projects.

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Biotechnology Lecture Notes

Enzyme Immobilization Methods and Applications (Biotechnology Lecture Notes)

Methods & Applications of Enzyme & Whole Cell Immobilization
(Advantages and Disadvantages of Enzyme Immobilization; Matrix/Supports Used in Enzyme Immobilization)


What is enzyme immobilization?

Immobilization is defined as the imprisonment of cell or enzyme in a distinct support or matrix. The support or matrix on which the enzymes are immobilized allows the exchange of medium containing substrate or effector or inhibitor molecules. The practice of immobilization of cells is very old and the first immobilized enzyme was amino acylase of Aspergillus oryzae for the production of L-amino acids in Japan. 

Advantages of immobilized enzymes:

(1).   Increased functional efficiency of enzyme

(2).   Enhanced reproducibility of the process they are undertaking

(3).   Reuse of enzyme

(4).   Continuous use of enzyme

(5).   Less labour input in the processes

(6).   Saving in capital cost and investment of the process

(7).   Minimum reaction time

(8).   Less chance of contamination in products

(9).   More stability of products

(10). Stable supply of products in the market

(11). Improved process control

(12). High enzyme substrate ratio

Disadvantages of enzyme immobilization:

(1).  Even though there are many advantages of immobilized enzymes, there are some disadvantages also.

(2).  High cost for the isolation, purification and recovery of active enzyme (most important disadvantage)

(3).  Industrial applications are limited and only very few industries are using immobilized enzymes or immobilized whole cells.

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