Tag: bio-chemistry

Questions Related to bio-chemistry

A similarity between sapvacuoles of eukaryotic and periplasmic space of bacteria is that

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

  1. A) both contain hydrolytic enzymes

  2. B) both contain Anthocyanin pigments

  3. C) both contain metabolic gases which regulate buoyancy

  4. D) both contain osmoregulatory and excretory function

Show answer
Correct Option: A
Explanation:

Both the sap vacuoles and periplasmic membrane of bacteria contains the hydrolytic enzyme for their digestive purposes.

Therefore the right answer is 'both contain hydrolytic enzymes'

(A) Present in prokaryotes and eukaryotes
(B) Composed of ribonucleic acid and proteins above stements are true for:-

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

  1. Vacuoles

  2. Chloroplast

  3. Mesosome

  4. Ribosome

Show answer
Correct Option: D
Explanation:

The ribosome is found in both prokaryotes (70s) and eukaryote (80s). The ribosome is a complex molecule made of ribosomal RNA molecules and proteins that form a factory for protein synthesis in the cell.

Correct option is D, Ribosome.

Select the correct match

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

  1. 70 S ribosomes-bacterial mesosome

  2. Cytoskeleton-lipoprotein

  3. Kinetochore-centromere

  4. Lysosomes- catalase

Show answer
Correct Option: A
Explanation:

The 70S ribosome is found in prokaryotic organisms and mesosome are invaginations of cell membrane so they do not contain any ribosome.

The cytoskeleton of the cell is solely made of proteins that are actins and never of lipoproteins.
The kinetochore is a disc-shaped structure on the primary constriction of every chromosome called as Centromere.
The lysosomes are the membrane-bound vesicular structures rich in Hydrolases enzymes but never in catalase enzyme. The enzyme catalase is found in abundance inside peroxisomes.
So, the correct answer to the question is 'Kinetochore-centromere'.

Which element is found in abundance in eukaryotic cell?

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

  1. Ca

  2. P

  3. Mg

  4. S

Show answer
Correct Option: A
Explanation:

A cell requires several mineral elements for various structural and metabolic roles. The calcium is the most abundant element in eukaryotic cells. It is required for integrity of plant cell wall. In animals, calcium is important for membrane permeability, muscle activity, blood clotting and its role as second messenger. 

The cells having well organised nucleus that undergoes mitosis are called as______________

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

  1. Eukaryotic

  2. Prokaryotic

  3. Mesokaryotic

  4. None of these

Show answer
Correct Option: A
Explanation:

Prokaryotes are the organism that does not possess a well-defined nucleus. Nucleoid is a region in the prokaryotic cell where its most of the genetic material resides. It is not a well-defined membrane-bound region. 
Eukaryotic cells possess a well-organized nucleus (like eukaryotes) but its nucleus divides through amitosis (like prokaryotes). Dinoflagellates cells are mesokaryotic cells.  
The nucleus is bound to double membrane in the eukaryotic cell in which most of the genetic material is present and undergoes mitotic division.
So, the correct answer is option A.

With regard to mature mRNA in eukaryotes?

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

  1. Exons and introns do not appear in the mature RNA

  2. Exons appear but introns do not appear in the mature RNA

  3. Introns appear but exons do not appear in the mature RNA

  4. Both exons and introns appear in the mature RNA

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Correct Option: A

The complete organelles occur in

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

  1. Viruses

  2. Bacteria

  3. Eukaryotic cell

  4. All of the above

Show answer
Correct Option: C
Explanation:

Eukaryotic cells are the cells which contain well developed, membrane-bounded nucleus and organelles such as mitochondria and the Golgi apparatus. In addition, plants and algae contain chloroplasts. Any organism, whose cells contain a nucleus and other organelles enclosed within membranes belong to the taxon Eukarya or Eukaryota. Thus, the correct answer is option C.

Potista are  ... 

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

  1. Noncellular

  2. acellular

  3. prokaryote

  4. sybcytial

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Correct Option: A

Read the following statements about eukaryotic cells and choose the incorrect statements .
(i)They have locomotory and cytoskeletal structure.
(ii)Their genetic material is organized into chromosomes.
(iii)There is extensive compartmentalization of cytoplasm.
(iv)They posses an organised nucleus without a nuclear envelope.

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

  1. $iii\, and \,iv$

  2. $Only\,iv$

  3. $Only\,ii$

  4. $i\,and iv$

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Correct Option: A

Histones are

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

  1. Acidic

  2. Basic

  3. Neutral

  4. Strong acidic

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Correct Option: A