Lecture notes in Microbiology

MCQ on Basics of Microbiology with Answer Key and Explanations (Microbiology MCQ03)


microbiology quizzes on basics

MICROBIOLOGY MCQ-03
(Biology / Life Sciences MCQ: Multiple Choice Questions in Microbiology)

MCQ on Basics of Microbiology Part – 1
(Sample/Model/Practice Questions for NEET, AIPMT, M.Sc. and Medical Entrance Examination)

(1). Virulence of a microorganism can be best described as:

a.       The ability to penetrate into the host tissue
b.      The ability to colonize in the host
c.       The ability to produce a pathological symptom
d.      The ability to utilize the machinery of the host
e.       All of the above

(2). “The feeling of general discomfort” is called as:

a.       Arthritis
b.      Symptom
c.       Malaise
d.      Pain

(3). The utilization of elemental carbon by microbes during bio-geochemical cycle is called:

a.       Dissimilation
b.      Immobilization
c.       Mineralization
d.      Neutralization

(4). The first antibody to contact invading microorganism is:

a.       IgG
b.      IgA
c.       IgM
d.      IgD

(5). Which of the following vector(s) was extensively used in human genome project?

a.       Plasmid vector
b.      Yeast Artificial chromosome
c.       Cosmid vector
d.      (b) and (c)

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Lecture notes in Microbiology

Microbiology MCQ 02 Practice Questions Part 2 with Answer Key and Explanations


microbiology quizzes with answer key

MICROBIOLOGY MCQ-02
(Biology / Life Sciences MCQ: Multiple Choice Questions in Microbiology)

Quizzes on Microbiology: Practice Test Part 2
(Sample/Model/Practice Questions for CSIR JRF/NET Life Science Examination, ICMR JRF Exam, DBT BET JRF Exam, GATE BT and XL Exam, ICAR JRF NE Exam, PG Entrance Exam, JAM Exam, GS Biology Exam and Medical Entrance Exam)

1. Glucans, Mannans and Chitin are found to be present in the cell wall of ______

a.       Plants
b.      Eubacteria
c.       Fungi
d.      Actinomycetes

2.  _____ is a synthetic Antimicrobial drug against Mycobacterium tuberculosis.

a.       Penicillin
b.      Tetracycline
c.       Erythromycin
d.      Isoniazid

3. Who isolated Streptococcus pneumonia for the first time?

a.       Robert Koch
b.      Edward Jenner
c.       Antony von Leewenhock
d.      Louis Pasteur

4. Botulinum toxin is a ________.

a.       Protein
b.      Lipid
c.       Sugar
d.      Nucleic acid

5. Tear drops are rich in ___________.

a.       Amylase
b.      Phosphatase
c.       Lysozyme
d.      Protease

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Lecture notes in Microbiology

Microbiology MCQ 01 Practice Questions Part 1 with Answer Key and Explanations


microbiology quizzes

MICROBIOLOGY MCQ-01
(Biology / Life Sciences MCQ: Multiple Choice Questions in Microbiology)

Quizzes on Microbiology: Practice Test Part 1
(Sample/Model/Practice Questions for CSIR JRF/NET Life Science Examination, ICMR JRF Exam, DBT BET JRF Exam, GATE BT and XL Exam, ICAR JRF NE Exam, PG Entrance Exam, JAM Exam, GS Biology Exam and Medical Entrance Exam)

1. The process in which all living cells, spores and viruses are completely destroyed from an object is called _____.

a.       Disinfection
b.      Pasteurization
c.       Sterilization
d.      Antisepsis

2. UHT sterilization involves high temperature exposure of objects for _____.

a.       1 – 3 seconds
b.      1 – 3 minutes
c.       1 – 3 hours
d.      10 – 30 hours

3.  _______ is an antiseptic.

a.       Chlorine
b.      Copper Sulphate
c.       Ozone
d.      70% ethanol

4. Error rate of Taq DNA polymerase is _____

a.       10-4
b.      10-14
c.       10-24
d.      10-40

5. The best form of DNA to transform E. coli is ______.

a.       Linear
b.      Covalently closed
c.       Nicked circles
d.      Nicked linear

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Botany lecture notes

P Protein (Phloem Protein): Structure, Classifications and Functions


forisomes definition

P – Protein (Phloem Protein)
(Structure, Classification and Functions of Phloem Proteins)

What are P Proteins? 

Ø  P Proteins (Phloem Proteins) are a category of proteins found in the sap of the sieve tubes of the phloem of Angiospermic plants.

Ø  P-proteins were also as called ‘slime bodies’ of ‘slime’ in the old literature.

Ø  P proteins are usually found in the phloem of dicot plants.

Ø  They are very rarely reported in monocots.

Ø  P proteins are completely absent in the phloem of Pteridophytes and Gymnosperms.

Ø  P proteins occur in different forms in the different developmental stages of sieve tubes.

Ø  P proteins can exist in the sieve tubes as tubular, globular, fibrillar, granular and crystalline forms.

Ø  P proteins are highly polar molecules and they can form gel like substance in the presence of water.

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Botany lecture notes

Complex Tissue System in Plants: Part 2 – Phloem – Structure, Components and Classification (with PPT)


cell types in phloem

Phloem
Structure, Composition & Classification of Primary and Secondary Phloem

What is phloem?

Phloem is a complex tissue system in plants. It is the food conducting tissue of vascular plants. Together with xylem, they form the vascular tissue system. The phloem composed of several types of cells among which some are living cells and some are dead. The term ‘phloem’ was introduced Nageli (1853) from a Greek word ‘phloios’ meaning ‘bark’. The ‘bark’ is a non-technical term describing all tissue outside the secondary xylem of the plant. Botanically the bark includes secondary phloem, cortex, primary phloem and periderm. The current post describes the structure, composition and classification of phloem.

Location of phloem in plants:

Ø  Usually, the phloem is situated external to xylem.

Ø  In leaves, the phloem is located on the abaxial side (lower side).

Ø  In some plants (members of Cucurbitaceae and Convolvulaceae), the phloem is present on both external and internal to xylem. Such a vascular bundle is called bicollateral vascular bundle.

Ø  Phloem present internal to the xylem is called ‘internal phloem’ or intra-xylary phloem.

Ø  Phloem located external to the xylem is called ‘external phloem’.

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