Tag: unit of living - cell

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Questions Related to unit of living - cell

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

Cuticle occurs over

  1. Virus

  2. Human cell

  3. Plant cell

  4. Bacterium
Reveal answer Fill a bubble to check yourself
C Correct answer
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'.
Multiple choice bio-chemistry unit of living - cell eukaryotic cell kinds of cell introduction to eukaryotic cell

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 

  1. One

  2. Two

  3. Three

  4. All of above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Statement 1 is false (no eukaryotes fix nitrogen). Statements 2, 3, and 4 are correct. Since only one statement is false, the answer 'One' is correct.

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

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.

  1. ii and iii

  2. ii only

  3. i and ii

  4. i and iv
Reveal answer Fill a bubble to check yourself
A Correct answer
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'.

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

A mature human erythrocyte has the typical characteristic of

  1. A eukaryotic cell

  2. A prokaryotic cell

  3. Both eukaryotic and prokaryotic cell

  4. Neither eukaryotic nor prokaryotic cell.
Reveal answer Fill a bubble to check yourself
A Correct answer
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'.

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

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

  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
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Cycloheximide inhibits protein synthesis in eukaryotes by blocking the elongation phase during translation, making option A correct. Option D has a typo (erythromycin, not 'erythyromycin'). Formylated mRNA is for prokaryotic initiation, and single mRNA producing multiple products (polycistronic) is prokaryotic.