mcq biology

MCQ on Plasma Membrane Structure and Function with Answer Key Part I


cytology quiz plasma membrane

MCQ on Plasma Membrane (Part 1) : Structure of Cell Membrane

(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 average thickness of plasma membrane of a eukaryotic cell is:

A.      5 to 10 nm
B.      5 to 10 Å
C.      5 to 10 µm
D.     5 to 10 pµm

(2). Which of the following is NOT the function of plasma membrane?

A.      Intercellular interactions
B.      Responding to external stimuli
C.      Energy transduction
D.     Assisting in chromosome segregation

(3). Which of the following statement is true regarding the surface tension of plasma membrane?

A.      Surface tension of plasma membrane is more than pure lipid structures
B.      Surface tension of plasma membrane is less than pure lipid structures
C.      Surface tension of plasma membrane and pure lipid structures are same
D.     Plasma membrane do not have surface tension

(4). Which of the following statements best describes the chemical composition of plasma membrane?

A.      Plasma membrane is composed of two layers—one layer of phospholipids and one layer of proteins.
B.      Plasma membrane is composed of equal numbers of phospholipids, proteins, and carbohydrates.
C.      Plasma membrane is bilayers of proteins with associated lipids and carbohydrates.
D.     Plasma membrane is bilayers of phospholipids with associated proteins and carbohydrates.

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Free Net Life Science Study Materials

CSIR NET Question Paper Model (June 2016) Examination Part 4 with Answers & Explanations


net life science model question paper june 2016

Synthetic Herbicide Mechanism of Action

CSIR JRF NET Life Science Exam June 2016: Model (sample) Question Paper Set 4

(1). In pET expression vectors, high level of expression of cloned gene is achieved using

a.       T7 promoter
b.      SP6 promoter
c.       Λ-PL promoter
d.      Trp promoter

(2). Archaea is considered as a separate group from bacteria and eukaryotes, based on

a.       Genome sequence
b.      16S rRNA gene sequence
c.       23S rRNA gene sequence
d.      EFTu sequence

(3). A hybrid between species following by polyploidy or chromosome doubling is known as

a.       Auto-polyploidy
b.      Aneuploidy
c.       Haploid
d.      Allopolyploid

(4). The herbicide that kills plants by blocking the photosynthetic electron flow of photosystem-I is

a.       Diuron
b.      Paraquat
c.       Glyphosate
d.      Atrazine

(5). In submerged plants the root tip stimulates the activity of

a.       ACC synthase
b.      ACC oxidase
c.       ACC synthase and ACC oxidase
d.      ACC kinase

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Biotechnology Eligibility Test Preparation

DBT JRF Previous Year Question Paper 2015 Solved with Answer Key (Download PDF)


biotechnology jrf question paper

Original (original) Previous Year (old) Solved Question Paper of DBT BET JRF 2015 Examination (Department of Biotechnology- Biotechnology Eligibility Test – Junior Research Fellowship) with Answer Key and Explanations as PDF. DBT BET JRF aspirants can download the question paper as single PDF file for your exam preparation. Please feel free to inform us for any mistakes in the answer key provided.

To download the question paper as single PDF file, please click on the download button below.

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Botany lecture notes

Similarities and Difference between Bryophyte and Algae (A Comparison Table)


difference between bryophytes and algae

Algae Vs Bryophytes

Bryophytes are the most primitive land plants. They are immediate between aquatic and terrestrial life. Even though bryophytes are well adapted for the land life they require the presence of water for the completion of their life cycle. Most of the evolutionary biologists believe that bryophytes were originated from Algae. This belief is strongly supported by the similarities of many characters in algae and bryophytes. This post describes the similarities and major difference between algae and bryophytes.

Similarities between Algae and Bryophytes

(1).      In both groups the plant body is thalloid and undifferentiated.

(2).      Plant body is not differentiated into root, stem and leaves in both groups

(3).      Gametophytic generation is the prominent phase in life cycle in both groups

(4).      True roots are absent in both groups of algae and bryophytes

(5).      Both groups are autotrophic in nutrition

(6).      In both algae and bryophytes major photosynthetic pigments are chlorophyll a, b and carotenes

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GATE XL Paper 2015 Chemistry: Original Solved Question Paper with Answer Key (Download PDF)


gate question papers with solutions

Official / Original Previous Year (Old) Solved Question Paper of GATE Life Sciences (XL) 2015 Chemistry Compulsory Paper with Answer Key and Explanations as PDF. GATE XL aspirants can download the question paper as single PDF file for your exam preparation. Please feel free to inform us for any mistakes in the answer key provided.

To download the question paper as single PDF file, please click on the link below.


GATE XL Model Questions GATE XL Previous Year Papers


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