Tag: unit of living - cell

Questions Related to unit of living - cell

Cuticle occurs over

bio-chemistry unit of living - cell eukaryotic cell kinds of cell introduction to eukaryotic cell

  1. Virus

  2. Human cell

  3. Plant cell

  4. Bacterium

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Correct Option: C
Explanation:
  • Cuticle can be defined as a protective film which covers the epidermis of leaves, young shoots and aerial parts of the plants.
  • It is mainly made up of lipids and hydrocarbon polymers that is impregnated with wax which is synthesized by the epidermal cells.
  • So, the correct answer is 'Plant cell'.

Which statement is wrong?

bio-chemistry unit of living - cell eukaryotic cell kinds of cell introduction to eukaryotic cell

  1. eIFs are initiation factors in Eukaryotes

  2. IFs are initiation factors in prokaryotes

  3. Initiator t RNA is specifically charged

  4. GTP is the power supplier for the formation of initiation comples

  5. All correct

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Correct Option: A

Which one of the following statements about protein synthesis in a eukaryotic cell is true?

bio-chemistry unit of living - cell eukaryotic cell kinds of cell introduction to eukaryotic cell

  1. Fornicated tRNa is important for initiation of translation

  2. Cycloheximide blocks elongation during translation

  3. Single in mRNAs specify for more than one gene product

  4. Erythromycin inhibits elongation during translation

Show answer
Correct Option: A

How many of following statements are not true?
1) Some unicellular Eukaryotes are capable of fixing Nitrogen
2) Infection thread contains an oxygen scavenger called leg-haemoglobin
3) Successful infection of the root hair causes it to curl
4) Ureides have particularly high nitrogen to carbon ratio 

bio-chemistry unit of living - cell eukaryotic cell kinds of cell introduction to eukaryotic cell

  1. One

  2. Two

  3. Three

  4. All of above

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Correct Option: A

How many organelles of a eukaryotic cell are considered to have an independent existence during early events of evolution?

bio-chemistry unit of living - cell eukaryotic cell kinds of cell introduction to eukaryotic cell

  1. $1$

  2. $2$

  3. $3$

  4. $4$

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Correct Option: A

Which of the following statements is true for eukaryotic cells?
i) They have unicellular cells only.
ii) They have a well organized nucleus.
iii) They have lysosomes and peroxisomes.
iv) Blue green algae are eukaryotic cells.

bio-chemistry unit of living - cell eukaryotic cell kinds of cell introduction to eukaryotic cell

  1. ii and iii

  2. ii only

  3. i and ii

  4. i and iv

Show answer
Correct Option: A
Explanation:

Eukaryotic cells are multicellular cells. They have a well organized nucleus enclosed within nuclear membrane. They have cell organelles like mitochondria, chloroplast, lysosomes, peroxisomes, Golgi bodies, etc. Prokaryotic cells are unicellular cells. They do not have nuclear membrane. Blue green algae are prokaryotic cells as they do not have  membrane bound organelles and nucleus.

Thus, the correct answer is 'ii and iii'.

Algae bryophytes pteridothytes gymnosperms and angiosperms. How many of them are eukaryotic?

bio-chemistry unit of living - cell eukaryotic cell kinds of cell introduction to eukaryotic cell

  1. All

  2. $1$

  3. $4$

  4. $3$

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Correct Option: A

A mature human erythrocyte has the typical characteristic of

bio-chemistry unit of living - cell eukaryotic cell kinds of cell introduction to eukaryotic cell

  1. A eukaryotic cell

  2. A prokaryotic cell

  3. Both eukaryotic and prokaryotic cell

  4. Neither eukaryotic nor prokaryotic cell.

Show answer
Correct Option: A
Explanation:

A mature erythrocyte has all the characters of a eukaryotic cell except the fact that they lack nucleus & other organelles because they shed other organelles  during maturation.

So, the correct optioni s 'A eukaryotic cell'.

Eukaryotics m-RNA's are associated with proteins to form RNP complexes. Some of the complexes may remain in the cytoplasm for a long time before being genetically expressed. Such complexes are known as.

bio-chemistry unit of living - cell eukaryotic cell kinds of cell introduction to eukaryotic cell

  1. Ribosomes

  2. Polyribosomes

  3. Rnp fibres

  4. Informosomes

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Correct Option: A

Which one of the following statements is TRUE about eukaryotic cells?

bio-chemistry unit of living - cell eukaryotic cell kinds of cell introduction to eukaryotic cell

  1. Cycloheximide blocks elongation during translation

  2. Formulated ERNA is necessary for initiation of translation

  3. A single mRNA specifies for more than one gene product

  4. Erythyromycin inhibits elongation during translation

Show answer
Correct Option: A