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The solid linear cytoskeletal elements h...

The solid linear cytoskeletal elements having a diameter of 6 nm and made up of a single type of monomer are known as

A

Microtubules

B

Microfilaments

C

Intermediate filaments

D

All the above

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The correct Answer is:
B
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Boran forms a number of hydrides having the general formulae BnH_(n+4) and BnH_(n+6) . These are called boranes the simplest hydride of boran is diborane. Borane contains special types of bonds known as multicentric bonds. Borans have high heat of combustion. The type of hybridisation of boron in diborane is

Boran forms a number of hydrides having the general formulae BnH_(n+4) and BnH_(n+6) . These are called boranes the simplest hydride of boran is diborane. Borane contains special types of bonds known as multicentric bonds. Borans have high heat of combustion. Which hydrid doesnot exist.

Boran forms a number of hydrides having the general formulae BnH_(n+4) and BnH_(n+6) . These are called boranes the simplest hydride of boran is diborane. Borane contains special types of bonds known as multicentric bonds. Borans have high heat of combustion. From B_(2)H_(6) , all the following can be prepared, except

Numerous forms of the periodic table have been devised from time to time. A modern version which is most convenient and widely used is the long or extended from of periodic table. The aufbau principle and the electronic configuration of atoms provide a theoretical foundation for the periodic classification. The horizontal rows are called periods. There are altogether seven periods. The first period consists of 2 elements. The subsequent periods consists of 8, 8,18, 18 and 32 elements respectively. The seventh period is incomplete and like the sixth period would have maximum of 32 elements. Elements having similar outer electronic configurations in their atoms are grouped in vertical columns. These are referred to as groups or families. According to the recommendations of IUPAC, the groups are numbered 1 to 18 replacing the older notation of groups 0, IA, IIA, ....VIIA, VIII, IB.....VIIB. Each successive period in the periodic table is associated with the filling up next higher principal energy level following aufbau sequence. The number of elements in each period is twice the number of atomic orbitals available in the energy level that is being filled. All the elements are classified into four blocks, i.e., s-block, p-block, d-block, and f-block depending on the type of atomic orbitals that are being filled with electrons. What is the position of the element in the periodic table satisfying the electronic configuration (n-1)d^1 ns^2 for n=4 ?

Numerous forms of the periodic table have been devised from time to time. A modern version which is most convenient and widely used is the long or extended from of periodic table. The aufbau principle and the electronic configuration of atoms provide a theoretical foundation for the periodic classification. The horizontal rows are called periods. There are altogether seven periods. The first period consists of 2 elements. The subsequent periods consists of 8, 8,18, 18 and 32 elements respectively. The seventh period is incomplete and like the sixth period would have maximum of 32 elements. Elements having similar outer electronic configurations in their atoms are grouped in vertical columns. These are referred to as groups or families. According to the recommendations of IUPAC, the groups are numbered 1 to 18 replacing the older notation of groups 0, IA, IIA, ....VIIA, VIII, IB.....VIIB. Each successive period in the periodic table is associated with the filling up next higher principal energy level following aufbau sequence. The number of elements in each period is twice the number of atomic orbitals available in the energy level that is being filled. All the elements are classified into four blocks, i.e., s-block, p-block, d-block, and f-block depending on the type of atomic orbitals that are being filled with electrons. Elements A, B, C, D and E have the following electronic configuration: (A) 1s^2, 2s^2 2p^1 (B) 1s^2, 2s^2 2p^6 , 3s^2 3p^1 (C ) 1s^2, 2s^2 2p^6 , 3s^2 3p^3 (D) 1s^2 , 2s^2 2p^6 , 3s^2 3p^5 (E) 1s^2 , 2s^2 2p^6 , 3s^2 3p^6 Which among these will belong to same group in the periodic table ?

Numerous forms of the periodic table have been devised from time to time. A modern version which is most convenient and widely used is the long or extended from of periodic table. The aufbau principle and the electronic configuration of atoms provide a theoretical foundation for the periodic classification. The horizontal rows are called periods. There are altogether seven periods. The first period consists of 2 elements. The subsequent periods consists of 8, 8,18, 18 and 32 elements respectively. The seventh period is incomplete and like the sixth period would have maximum of 32 elements. Elements having similar outer electronic configurations in their atoms are grouped in vertical columns. These are referred to as groups or families. According to the recommendations of IUPAC, the groups are numbered 1 to 18 replacing the older notation of groups 0, IA, IIA, ....VIIA, VIII, IB.....VIIB. Each successive period in the periodic table is associated with the filling up next higher principal energy level following aufbau sequence. The number of elements in each period is twice the number of atomic orbitals available in the energy level that is being filled. All the elements are classified into four blocks, i.e., s-block, p-block, d-block, and f-block depending on the type of atomic orbitals that are being filled with electrons. An element belongs to group 17 with atomic number is 17. What is the atomic number of the element belonging to same group and present in fifth period?

AAKASH SERIES-THE UNIT OF LIFE -EXERCISE-III (Previous AIPMT/NEET Questions)
  1. Cell wall is absent in :

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  2. Which structures perform the function of mitochondria in bacteria?

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  3. The solid linear cytoskeletal elements having a diameter of 6 nm and m...

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  4. The osmotic expansion of a cell kept in water is chiefly regulated by

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  5. Match the following and select the correct answer.

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  6. Which one of the following living organisms completely lacks a cell wa...

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  7. A major site for synthesis of lipids is

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  8. The complex formed by a pair of synapsed homologous chromosomes is cal...

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  9. The Golgi complex plays a major role

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  10. Which one of the following organelle in the figure correctly matches w...

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  11. Which one of the following is correctly matched?

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  12. Which one of the following does not differ in E.coli and Chlamydomonas...

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  13. What is true about ribosomes?

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  14. Nuclear membrane is absent in

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  15. Select the correct statement from the following regarding cell membran...

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  16. Which one of the following conditions correctly describes the manner o...

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  17. What would be the number of chromosomes of the aleurone cells of a pla...

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  18. Important site for formation of glycoprotein and glycolipids is

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  19. Peptide synthesis inside a cell takes place in

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  20. Which one of the following structures between two adjacent cells is an...

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