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Companion cells are seen associated with...

Companion cells are seen associated with..... and controls the conduction of food

A

Sieve tube

B

Collenchyma

C

Medullary parechyma

D

Secondary cambium

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Read the paragraph and answer the questions given below: With the help of RNA, the genes present in the form of DNA particioate in the functioning of cell and thereby control the structure and functioning of the body. Information about protein synthesis is stored in the DNA and synthesis of appropriate proteins as per synthesized by DNA through rthe RNA. This is called 'Central Dogma'. mRNA is produced as per the sequence of nucleotides on DNA. Only one of the two strands of DNA is used in this process. The seqience of nucleotides in mRNA being produced is always complementary to the DNA strand used for synthesis. Besides, there is uracil in RNA instead of thymine of DNA. This is process of RNA synthesis is called 'transcription'. What is the similarity between mRNA and DNA?

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Read the paragraph and answer the questions given below: With the help of RNA, the genes present in the form of DNA participate in the functioning of cell and thereby control the structure and functioning of the body. Information about protein synthesis is stored in the DNA and synthesis of appropriate proteins as per synthesized by DNA through the RNA. This is called 'Central Dogma'. mRNA is produced as per the sequence of nucleotides on DNA. Only one of the two strands of DNA is used in this process. The seqience of nucleotides in mRNA being produced is always complementary to the DNA strand used for synthesis. Besides, there is uracil in RNA instead of thymine of DNA. This is process of RNA synthesis is called 'transcription'. Define central dogma.

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NIKITA PUBLICATION -PLANT TISSUE AND ANATOMY-EXERCISE
  1. Among the tracheids and vessels which are more evolved elements

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  2. Which elements of xylem helps in conduction of water and minerals as w...

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  3. The elements of xylem helps in storage & living is

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  4. Identify the false statement

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  5. Read the followingstatements... (A) When protoxylem towards centre an...

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  6. Which of the following is true about xylem parenchyma

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  7. Secondary xylem is formed from... during…

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  8. The balloon like outgrowth formed by xylem parenchyma into vessels are...

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  9. Structures which develop from wood parenchyma block transportation of ...

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  10. Which of the following is present in both xylem and phloem

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  11. Longest vessel is of:

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  12. Conducting part of phloem is also named as....

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  13. Companion cells are seen associated with..... and controls the conduct...

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  14. A living mature cell which lacks nucleus.

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  15. In mature sieve tubes a carbohydrate is responsible for closing the si...

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  16. The cell functionally associated with sieve tube only in angiosperm an...

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  17. The Chief conducting element in the phloem of angiosperm is

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  18. Which of the following statement is true

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  19. In phloem of gymnosperms

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  20. All of the following statements is true except

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