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Eukaryotic cells have a well organis...

Eukaryotic cells have a well organised nucleus and
a. Both 70 S and 80 S types of ribosomes
b. Flagella associatd with 9 + 2 organisation
c. Shows cytoplasmic streaming
d. their DNA si complexed with histones to constitute the chromatin

A

All are correct

B

Only a is incorrect

C

Only c and d are correct

D

Both b and c are incorrect

Text Solution

AI Generated Solution

The correct Answer is:
To answer the question regarding the characteristics of eukaryotic cells, we will analyze each statement provided in the options: ### Step-by-Step Solution: 1. **Understanding Eukaryotic Cells**: Eukaryotic cells are characterized by having a well-organized nucleus and various organelles. This includes ribosomes, flagella, cytoplasmic streaming, and DNA organization. 2. **Analyzing Statement A**: - **Statement**: Eukaryotic cells have both 70 S and 80 S types of ribosomes. - **Explanation**: Eukaryotic cells contain 80S ribosomes, which are found in the cytoplasm and on the rough endoplasmic reticulum. Additionally, they have 70S ribosomes located in mitochondria and chloroplasts (which are semi-autonomous organelles). - **Conclusion**: This statement is **correct**. 3. **Analyzing Statement B**: - **Statement**: Flagella associated with 9 + 2 organization. - **Explanation**: In eukaryotic cells, flagella and cilia are composed of microtubules arranged in a 9 + 2 structure (9 pairs of microtubules surrounding 2 central microtubules). - **Conclusion**: This statement is **correct**. 4. **Analyzing Statement C**: - **Statement**: Shows cytoplasmic streaming. - **Explanation**: Cytoplasmic streaming is the movement of the cytoplasm within a cell, which is facilitated by the cytoskeleton. This process is indeed observed in eukaryotic cells, aiding in the distribution of nutrients and organelles. - **Conclusion**: This statement is **correct**. 5. **Analyzing Statement D**: - **Statement**: Their DNA is complexed with histones to constitute the chromatin. - **Explanation**: In eukaryotic cells, DNA is wrapped around histone proteins to form chromatin, which is essential for DNA packaging and regulation. This is a defining feature of eukaryotic cells, as prokaryotic cells do not have histones. - **Conclusion**: This statement is **correct**. 6. **Final Conclusion**: Since all four statements (A, B, C, and D) regarding eukaryotic cells are correct, the answer to the question is that **all are correct**. ### Final Answer: **Option A: All are correct.**
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A solution which remains in equilibrium with undissolved solute , in contact , is said to be saturated . The concentration of a saturated solution at a given temperature is a called solubility . The product of concentration of ions in a saturated solution of an electrolyte at a given temperature is called solubility product (K_(sp)) . For the electrolyte A_(x),B_(y) with solubility S. The solubility product (K_(sp)) is given as K_(sp) = x^(x) xx y^(y) xx S^(x-y) . While calculating the solubility of a sparingly . soluable salt in the presence of some strong electrolyte containing a common ion , the common ion concentration is practically equal to that of strong electrolyte containing a common ion . the common ion soncentration is practically equal to that of strong electrolyte . If in a solution , the ionic product of an electroylte exceeds its K_(sp) value at a particular temperature , then precipitation occurs . If two or more electrolyte are presentt in the solution , then by the addition of some suitable reagent , precipitation generally occurs in increasing order of their k_(sp) values . Solubility of some sparingly soluable salts , is sometimes enhanced through complexation . While we are calculating the solubility of some sparingly or pH of an electrolyte , the nature of cation of anion should be checked carefully whether there ion (s) are capable of undergoing hydrolysis or not . If either or both of the ions are capable of undergoing hydrolysis , it should be taken into account in calculating the solubility . While calculating the pH of an amphiprotic species , it should be checked whether or not cation can undergo hydrolysis . Total a_(H^(-)) = sqrt(K_(a_(1)xxK_(a_(2)))) (if cation do not undergo hydrolysis ) a_(H^(+)) = sqrt(K_(a_(1))((K_(w))/(K_(b)) - K_(a_(2)))) (if cation also undergoes hydrolysis ) where symbols have usual meaning . Solubility of solids into liquids is a function of temperature alone but solubility of gases into liquids is a function of temperature as well as pressure . The effect of pressure on solubility of gases into liquids is governed by Henry's law . The solubility of BaSO_(4) in 0.1 M BaCl_(2) solution is (K_(sp) " of " BaSO_(4) = 1.5 xx 10^(-9))

A solution which remains in equilibrium with undissolved solute , in contact , is said to be saturated . The concentration of a saturated solution at a given temperature is a called solubility . The product of concentration of ions in a saturated solution of an electrolyte at a given temperature is called solubility product (K_(sp)) . For the electrolyte A_(x),B_(y) with solubility S. The solubility product (K_(sp)) is given as K_(sp) = x^(x) xx y^(y) xx S^(x-y) . While calculating the solubility of a sparingly . soluable salt in the presence of some strong electrolyte containing a common ion , the common ion concentration is practically equal to that of strong electrolyte containing a common ion . the common ion soncentration is practically equal to that of strong electrolyte . If in a solution , the ionic product of an electroylte exceeds its K_(sp) value at a particular temperature , then precipitation occurs . If two or more electrolyte are presentt in the solution , then by the addition of some suitable reagent , precipitation generally occurs in increasing order of their k_(sp) values . Solubility of some sparingly soluable salts , is sometimes enhanced through complexation . While we are calculating the solubility of some sparingly or pH of an electrolyte , the nature of cation of anion should be checked carefully whether there ion (s) are capable of undergoing hydrolysis or not . If either or both of the ions are capable of undergoing hydrolysis , it should be taken into account in calculating the solubility . While calculating the pH of an amphiprotic species , it should be checked whether or not cation can undergo hydrolysis . Total a_(H^(-)) = sqrt(K_(a_(1)xxK_(a_(2)))) (if cation do not undergo hydrolysis ) a_(H^(+)) = sqrt(K_(a_(1))((K_(w))/(K_(b)) - K_(a_(2)))) (if cation also undergoes hydrolysis ) where symbols have usual meaning . Solubility of solids into liquids is a function of temperature alone but solubility of gases into liquids is a function of temperature as well as pressure . The effect of pressure on solubility of gases into liquids is governed by Henry's law . The solubility of PbSO_(4) in water is 0.0303 g/l at 25^(@)C , its solubility product at that temperature is

AAKASH INSTITUTE ENGLISH-CELL:THE UNIT OF LIFE -Assignment(section-B) (subjective type qusetion)
  1. Certain golgain vesicles which are budded- out from the trans - ...

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  2. In plants the tonoplast facilitates the transport of a number of...

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  3. Mitochondria and chloroplasts are semi- autonomous as they possess

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  4. The symbiont hypothesis suggests that there are similarities between p...

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  5. How many organelles of a eukaryotic cell are considered to have ...

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  6. Consider the following five statement ( A to E ) w.r.t. Chloropla...

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  7. Find the correct set of structures // organelles not s urrounded b...

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  8. The larger sub- unit of a ribosome is found to contain 28S , 5,8S ...

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  9. An organelle that has no DNA but capable of duplication is

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  10. Each centriole has a cart wheel organisation having a whorl of t...

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  11. Find out all the protiens that make eukaryotic flegellum.

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  12. Consider the following statement and choose the incorrect opti...

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  13. Eukaryotic cells have a well organised nucleus and a. Both 70...

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  14. 9 + 2 organisation is present in

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  15. Find out the correct .option on the basis following diagrams

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  16. Nucleolus is formed by

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  17. All the following statements are correct except ,

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  18. Triglyceride metabolism to convert fats into carbohydrates is h...

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  19. Catalase and urate oxidase enzymes are associated with the organ...

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  20. In fluid mosaic model of plasma membrane ,

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