Tag: bio-chemistry

Questions Related to bio-chemistry

.......... possesses an organised nucleus with a nuclear envelope.

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

  1. Prokaryotic

  2. Eukaryotic 

  3. Both A and B

  4. None of the above

Show answer
Correct Option: B
Explanation:
The eukaryotic cell is a cell which contains a membrane-bound nucleus. The nuclear membrane that surrounds nucleus in eukaryotic cells gives the defined structure to the nucleus which consists genetic material. So, the correct answer is option B.

Plant and animal cells are  .......... cells. 

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

  1. Eukaryotic

  2. Prokaryotic

  3. All are prokaryotic with few eukaryotes

  4. All of the above

Show answer
Correct Option: A
Explanation:

Plant and animal cells are both eukaryotic cells, so they have several features in common, such as the presence of a nucleus with nuclear membrane and membrane-bounded organelles. 80S ribosomes are present in both the type of cell.

So, the correct answer is option A.

................  are found in eukaryotes, but not in prokaryotes.

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

  1. Ribosomal RNA

  2. Plasma membrane

  3. Nuclear membrane

  4. Ribosomes

  5. None of the above

Show answer
Correct Option: C
Explanation:
Eukaryotic cells differ from prokaryotic cells in having a eukaryon or an advanced nucleus having a nuclear membrane. The prokaryotic cells have a primitive nucleus without a nuclear membrane, where the nuclear material lies freely in the cytoplasm in the nucleoid region.
Thus, the correct answer is option 'Nuclear membrane'.

 Which of the following types of cell has a well developed cell nucleus?

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

  1. Prokaryotic

  2. Eukaryotic

  3. Both A and B

  4. None of the above

Show answer
Correct Option: B
Explanation:

Eukaryotic cells contain a membrane-bound nucleus. The nuclear membrane that surrounds nucleus in eukaryotic cells gives the defined structure to the nucleus which consists genetic material and thus eukaryotic nucleus is called as well developed nucleus.

Which of these cell organelles have double membranes?

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

  1. Mitochondria

  2. Chloroplast

  3. Nucleus

  4. All of the above

Show answer
Correct Option: D
Explanation:

Mitochondria are organelles in cells of eukaryotes. They are double-membraned and the inner membrane forms numerous folds called cristae which extend into the matrix.

The nucleus is surrounded by a nuclear envelope which is double-membraned structure and consists of an outer membrane and an inner membrane that are perforated to allow entry of components into the nucleus.
Chloroplasts are organelles present in plants. They are double-membraned and the inner membrane shows the presence of thylakoids.
Thus the correct answer is option D.

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 contain a well organized, membrane-bound nucleus and organelles (mitochondria, lysosomes, Golgi apparatus) and not found in prokaryotes like bacteria, cyanobacteria. Eukaryotic cells are more complex than prokaryotic cells and are found in a great many different forms. Thus, the correct answer is option A.

Which one of the following organisms is not an eukaryote?

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

  1. Paramecium caudatum

  2. Escherichia coli

  3. Euglena viridis

  4. Amoeba proteus

Show answer
Correct Option: B
Explanation:

Eukaryotes are the organisms which have membrane-bound cell organelles as well as membrane-bound nucleus. All the kingdoms except kingdom monera possess eukaryotes.

Paramecium caudatum and Amoeba proteus are the protozoans belonging to kingdom Protista. So, they are eukaryotes.
Euglena viridis also belongs to kingdom Protista. It is a protistan algae.
Escherichia coli is not a eukaryote. It is a gram -ve bacteria belonging to kingdom Monera. Monera is a kingdom of prokaryotes. They do not have membrane-bound organelles and an organised nucleus.

A cell that is bound solely by a plasma membrane, contains ribosomes, cytoplasm, a nucleus, mitochondria, and Golgi bodies could be characterized as 

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

  1. Prokaryote

  2. Eukaryote

  3. Fungi

  4. Archaebacteria

Show answer
Correct Option: B
Explanation:

Cell organelles like mitochondria, nucleus, Golgi apparatus etc are components of an eukaryotic cell

So, the correct answer is 'Eukaryote'

Select the correct pair in which one is a prokaryote, whereas the other is a eukaryote.

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

  1. Cyanobacteria and algae

  2. Algae and fungi

  3. Mosses and ferns

  4. Ferns and gymnosperms

  5. Gymnosperms and angiosperms

Show answer
Correct Option: A
Explanation:

The prokaryotic cell is the cell devoid of nuclear membrane and membrane-bound organelles whereas eukaryotic cell has membrane bound nucleus and organelles. Cyanobacteria are the prokaryotic microscopic organism (kingdom Monera) while algae, fungi, mosses, fern and spermatophytes (angiosperms and gymnosperms) are eukaryotes.
So, the correct answer is option A.

The division of the organisms into Prokaryota and Eukaryota is based on the characters of

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

  1. Nucleus only

  2. More than one chromosome

  3. Cell organelles only

  4. All of the above

Show answer
Correct Option: D
Explanation:

Prokaryotes are the organism whose cell do not possess membrane-bound nucleus and organelles except ribosome. Instead of organelles, all the function is performed by the cytoplasm and cell membrane. Whereas eukaryotes are the organism whose cell possess membrane-bound organelle and nucleus. Prokaryotic cell possesses single circular chromosome whereas eukaryotic cell possesses more than one chromosomes. Thus, the correct answer is option D.