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What are cytoskeleton made up of
Cytoskeleton is made up of microtubule, actin filaments and intermediate filaments
The ans to this question is  In his Systema Naturae, first published in 1735, Carolus Linnaeus distinguished two kingdoms of living things: Animalia for animals and Plantae (Vegetabilia) for plants. He classified all living organisms into two kingdoms – on the basis of nutrition and locomotion (mobility). This is called two kingdom system of classification.
  1. Sal1
  2. Eco RV
  3. Xho 1
  4. Hind III
  The answer of this question is Eco RV is a type II restriction endonuclease isolated from strains of E. coli. It creates blunt ends. The enzyme recognises the palindromic 6-base DNA sequence and makes a cut at vertical line
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DNA: DNA (deoxyribonucleic acid) is the genomic material in cells that contains the genetic information used in the development and functioning of all known living organisms. DNA, along with RNA and proteins, is one of the three major macromolecules that are essential for life. Most of the DNA is located in the nucleus, although a small amount can be found in mitochondria (mitochondrial DNA)....
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Any organism or a living form that possesses or shows the characteristics of life or being alive. Living things are those that display the following characteristics: an organized structure, being made up of a cell or cells. Living organism requires energy to survive or sustain existence.
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16 pollen grains, beacause each pollen mother cell produces 4 pollen grains.
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Ribosomes are a nonmembrane bound organelle produced in the nucleolus and contain ribosomal RN A. The ribosomeis made up of a large (60S) and small (40S) subunit that come together and attach to a messenger RN A. The ribosome translates the mRNA to protein by directing the appropriate transfer RNA, each of which carries an associated amino acid, to attach to the mRNA. Ribosomes forming...
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can I get chapter wise practise questions???? and not unit wise...I wanted to solve questions on morphology and not the whole structural organisation.
  @Vaibhavi Gat  There is a practice question for each concept
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IMG_20180811_155143.jpg

B

Medical
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Select the mismatch 

  • Option 1)

    Cycas -Dioecious 

  • Option 2)

    Salvinia-Heterosporous 

  • Option 3)

    Equisetum-Homosporous 

  • Option 4)

    Pinus - Dioecious 

 
  Gymnosperms - Evergreen, perennial woody trees or shrubs. They are non-flowering plants producing naked seeds. - wherein Eg Cycas, Pinus, Cedrus     Reproduction in Gymnosperms - Pollen grains are produced from microspores within microsporangia. Naked ovules are borne on megasporophyllus and has nucellus which develops into megaspore mother cell. - wherein Pollen grains are transfer by wind...
Medical
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Double fertilization is exhibited by: 

  • Option 1)

    Algae 

  • Option 2)

    Fungi 

  • Option 3)

    Angiosperms 

  • Option 4)

    Gynosperms 

 
  Characteristics of angiosperms - 1-Contains sex organs of the plants 2-Double fertilization present. 3-Endosperms generally triploid. 4-Heterospores present. -     Option 1) Algae  This is incorrect option Option 2) Fungi  This is incorrect option Option 3) Angiosperms  This is correct option Option 4) Gynosperms  This is incorrect option
Medical
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Viroids differ from viruses in having:

  • Option 1)

    DNA molecules without protein coat 

  • Option 2)

    RNA molecules with protein coat 

  • Option 3)

    RNA molecules without protein coat 

  • Option 4)

    DNA molecules with protein coat 

 
As we learnt in  Viroids - Smallest self replicating particles having RNA without protein coat. - wherein Causes potato spindle tuber disease (PSTD).     Composition of virus - Envelope - Outer loose covering with peplomer proteins. Capsid - Protein covering around the genetic material made of capsomeres. Nucleoid - Either DNA or RNA. -     Option 1) DNA molecules without protein...
Medical
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Which among the following are the smallest living cells, known without a definite cell wall, pathogenic to plants as well as animals and can survive without oxygen? 

  • Option 1)

    Pseudomonas

  • Option 2)

    Mycoplasma 

  • Option 3)

    Nostoc 

  • Option 4)

    Bacillus 

 
As we learnt in  Mycoplasm / PPLO ( Pleuropneumonia like organism ) - Smallest monerans Unicellular, non – motile Lack cell wall Resistance to antibiotics that affect cell wall synthesis like penicillin. Inhibited by antibiotics like tetracycline which acts on metabolic pathways. DNA is linear, double stranded extending almost throughout the cell. - wherein     Option...
Medical
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Which of the following are found in extreme saline conditions?

  • Option 1)

    Eubacteria 

  • Option 2)

    Cyanobacteia 

  • Option 3)

    Mycobacteria 

  • Option 4)

    Archaebacteria 

 

As learnt in

Archaebacteria -

Live in harsh habitats.

Cell walls lack muramic acid and peptidoglycan.

Branched lipids having Phytanyl side groups decreases membrane fluidity.

- wherein

They are of three major type

  • Methanogens
  • Halophiles
  • Thermoacidophiles

 

 And,

 

Halophiles -

  1. Chemoheterotrophs.
  2. Aerobic or Anaerobic.
  3. Gram negative bacteria.
  4. In sunlight they develop bacteriorhodopsin (purple pigment)and synthesize ATP.
  5. Occur in salt lakes, Salt marshes etc.

- wherein

Eg. Halococcus, Halobacterium

 

Archaebacteria are found in extreme saline conditions. 


Option 1)

Eubacteria 

This option is incorrect.

Option 2)

Cyanobacteia 

This option is incorrect.

Option 3)

Mycobacteria 

This option is incorrect.

Option 4)

Archaebacteria 

This option is correct.

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Which of the following is correctly matched for the product produced by them?

  • Option 1)

    Methanobacterium: Lactic acid

  • Option 2)

    Penicillium notatum : Acetic acid

  • Option 3)

    Sacchromyces cerevisiae: Ethanol

  • Option 4)

    Acetobacter aceti: Antibiotics

 
  Microbes used in Fermented Beverages - Microbes especially yeasts have been used for the production of beverages like wine, beer, whisky, brandy or rum. - wherein For this purpose the yeast Saccharomyces cerevisiae is used for fermenting malted cereals and fruit juices, to produce ethanol.       Option 1) Methanobacterium: Lactic acid This option is incorrect Option 2) Penicillium notatum :...
Medical
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Match the following sexually transmitted diseases (column-I) with their causative agent (column-II) and select the correct option:

     Column-I                   Column-II

A) Gonorrhea                 i) HIV

B) Syphilis                     ii) Neisseria

C) Genital Warts            iii) Treponema

D) AIDS                          iv) Human Papilloma-Virus

 

  • Option 1)

    A       B        C           D

    iii     iv         i           ii

  • Option 2)

    A       B        C           D

    iv      ii          iii           i

  • Option 3)

    A       B        C           D

    iv      iii          ii           i

  • Option 4)

    A       B        C           D

    ii      iii          iv          i

 
  Cause of AIDS - AIDS is caused by the Human Immuno Deficiency Virus (HIV), a member of a group of viruses called retrovirus. - wherein Retrovirus has an envelope enclosing the RNA genome.       Option 1) A       B        C           D iii     iv         i           ii This option is incorrect Option 2) A       B        C           D iv      ii          iii           i This option is...
Medical
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Which of the following statements is correct?

  • Option 1)

    The ascending limb of loop of Henle is impermeable to water

  • Option 2)

    The descending limb of loop of Henle is impermeable to water

  • Option 3)

    The ascending limb of loop of Henle is permeable to water

  • Option 4)

    The descending limb of loop of Henle is permeable to electrolytes

 
  MECHANISM OF CONCENTRATION OF THE FILTRATE - The flow of blood through the two limbs of vasa recta is also in a counter current pattern. The proximity between the Henle’s loop and vasa recta, as well as the counter current in them help in maintaining an increasing osmolarity towards the inner medullary interstitium, i.e., from 300 mOsmol L–1 in the cortex to about 1200 mOsmol L–1 in the...
Medical
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Which of the following options best represents the enzyme composition of pancreatic juice?

  • Option 1)

    Amylase, peptidase, trypsinogen, rennin

  • Option 2)

    Amylase, pepsin, trypsinogen, maltase

  • Option 3)

    Peptidase, amylase, pepsin, rennin

  • Option 4)

    Lipase, amylase, trypsinogen, procarboxypeptidase

 
  Enzymes in the Pancreatic Juice - The pancreatic juice contains inactive enzymes – trypsinogen, chymotrypsinogen, procarboxypeptidases, amylases, lipases and nucleases. -     Option 1) Amylase, peptidase, trypsinogen, rennin This solution is incorrect  Option 2) Amylase, pepsin, trypsinogen, maltase This solution is incorrect  Option 3) Peptidase, amylase, pepsin, rennin This solution is...
Medical
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The pivot joint between atlas and axis is a type of :

  • Option 1)

    Fibrous joint

  • Option 2)

    Cartilaginous joint

  • Option 3)

    Synovial joint

  • Option 4)

    Saddle joint

 
As learnt example of synovial joints - pivot joint - wherein joint between atlas and axis     Option 1) Fibrous joint This option is incorrect Option 2) Cartilaginous joint This option is incorrect Option 3) Synovial joint This option is correct Option 4) Saddle joint This option is incorrect
Medical
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Receptor sites for neurotransmitters are present on:

  • Option 1)

    Membranes of synaptic vesicles

  • Option 2)

    Pre-synaptic membrane

  • Option 3)

    Tips of axons

  • Option 4)

    Post-synaptic membrane

 
  Structure of neuron - bodies called Nissl’s granules. Short fibres which branch repeatedly and project out of the cell body also contain Nissl’s granules and are called dendrites. These fibres transmit impulses towards the cell body. The axon is a long fibre, the distal end of which is branched. Each branch terminates as a bulb-like structure called synaptic knob which possess synaptic...
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