Tag: biology

Questions Related to biology

Differentiate between prokaryotic and eukaryotic cells.

biology organization of life comparison of prokaryotic vs eukaryotic cells prokaryotic cell and eukaryotic cell types of cell

  1. Prokaryotic- have no membrane bound organelles, eukaryotic- have no membrane bound organelles

  2. Prokaryotic- have no membrane bound organelles, eukaryotic- have membrane bound organelles

  3. Prokaryotic- have nucleoid, eukaryotic- have nucleus

  4. Both B and C

Show answer
Correct Option: D
Explanation:

Prokaryotes do not possess membrane-bound organelles and well-defined nucleus. Nucleoid is a region in a prokaryotic cell, where most of the genetic material resides. It is not a well-defined membrane-bound region. 
Eukaryotes possess a well-defined nucleus and membrane-bound organelles as mitochondria, Golgi complex, etc. Nucleus is bound with double membrane in eukaryotic cells in which most of the genetic material is present. 

Eukaryotic chromosome different from prokaryotic as these are made up of

biology organization of life comparison of prokaryotic vs eukaryotic cells prokaryotic cell and eukaryotic cell types of cell

  1. RNA

  2. DNA

  3. DNA and lipid

  4. DNA and histone

Show answer
Correct Option: D
Explanation:

Eukaryotic chromosomes are made of chromatin, a nucleoprotein - DNA coiled around histone proteins while prokaryotic chromosomes are circular chromosome attached to the inside of the cell membrane. They are single chromosome plus plasmids

Prokaryotic cells bear smaller nucleus as compared to eukaryotic cells.

biology organization of life comparison of prokaryotic vs eukaryotic cells prokaryotic cell and eukaryotic cell types of cell

  1. True

  2. False

Show answer
Correct Option: B
Explanation:

Prokaryotic cells are primitive cells. They do not have well defined membrane bound nucleus. Nuclear material of a prokaryotic cell consists of a single chromosome which is in direct contact with cytoplasm. Here, the undefined nuclear region in the cytoplasm is called as nucleoid, i.e., there is no nuclear membrane. 

How is a prokaryotic cell different from a eukaryotic cell ?

biology organization of life comparison of prokaryotic vs eukaryotic cells prokaryotic cell and eukaryotic cell types of cell

  1. Prokaryotic cells- nucleoid, Eukaryotic cells- nucleus

  2. Prokaryotic cells- 70S type of ribosomes, Eukaryotic cells- 80S type of ribosomes

  3. Both A and B

  4. None of these

Show answer
Correct Option: C
Explanation:
Prokaryotes do not possess membrane-bound organelles and well-defined nucleus. Nucleoid is a region in prokaryotic cell where its most of the genetic material resides. It is not a well-defined membrane-bound region. Prokaryotic cells possess ribosomes of 70S type. 
Eukaryotes possess well-defined nucleus and membrane-bound organelles as mitochondria, Golgi complex, etc. Nucleus is bound with double membrane in eukaryotic cells in which most of the genetic material is present. Eukaryotic cells possess ribosomes of 80S type.
So, the correct answer is option C.

Bacteria differ from other plants in that, they do not have

biology organization of life comparison of prokaryotic vs eukaryotic cells prokaryotic cell and eukaryotic cell types of cell

  1. DNA

  2. RNA

  3. Cell wall

  4. A well defined nucleus

Show answer
Correct Option: D
Explanation:

Bacteria and plant cells possess DNA, RNA and cell wall. Bacteria being a prokaryote, lacks membrane bounded nucleus. Their genetic material is present in undefined nuclear region in the cytoplasm is called as nucleoid. while plant is a eukaryote, which has organized nucleus with double wall nuclear membrane.

An animal cell, a plant cell and a bacterium share the following structural features.

biology organization of life comparison of prokaryotic vs eukaryotic cells prokaryotic cell and eukaryotic cell types of cell

  1. Cell membrane, endoplasmic reticulum, vacuoles

  2. Cell wall, plasma membrane, mitochondria

  3. Cell wall, nucleus, cytoplasm

  4. Plasma membrane, cytoplasm, ribosomes

Show answer
Correct Option: D
Explanation:

Animal cell, plant cell and bacterium have plasma membrane, cytoplasm and ribosomes as common parts. Cell organelles and nucleus are absent in bacterial cell but present in animal and plant cells.

So, D is the correct option. 

Choose the difference between prokaryotes and eukaryotes?

biology organization of life comparison of prokaryotic vs eukaryotic cells prokaryotic cell and eukaryotic cell types of cell

  1. Prokaryotes have RNA, eukaryotes have DNA.

  2. Prokaryotes have a nucleoid, eukaryotes have a nucleus.

  3. Prokaryotes have DNA, eukaryotes have RNA.

  4. Prokaryotes have a nucleus, eukaryotes have a nucleoid.

Show answer
Correct Option: B
Explanation:

Prokaryotic cells are primitive cells. They do not possess many membrane bound organelles as mitochondria, lysosomes etc. They also do not have well defined membrane bound nucleus. Nuclear material of a prokaryotic cell consists of a single chromosome which is in direct contact with cytoplasm. Here, the undefined nuclear region in the cytoplasm is called as nucleoid, i.e., there is no nuclear membrane. 

Eukaryotes possess well defined nucleus and membrane bound organelles as mitochondria, Golgi complex, etc. Nucleus is bound with double membrane in eukaryotic cell in which most of the genetic material is present. 

The main difference between the prokaryotic cell and the eukaryotic cell is that in the prokaryotic cell there is no

biology organization of life comparison of prokaryotic vs eukaryotic cells prokaryotic cell and eukaryotic cell types of cell

  1. Mitochondria

  2. Cell wall

  3. Genetic system

  4. Distinct nucleus

Show answer
Correct Option: D
Explanation:

In the prokaryotic cell, there is no definite nucleus with a nuclear membrane. But the genetic material is distributed throughout the cytoplasm of the cell. Along with some of them may have cell wall and mitochondria.

All animals are eukaryotes and multi-cellular.

biology organization of life comparison of prokaryotic vs eukaryotic cells prokaryotic cell and eukaryotic cell types of cell

  1. True

  2. False

  3. Ambiguous

  4. Data insufficient

Show answer
Correct Option: A
Explanation:

Organisms are divided into five kingdoms by R.H.Whittaker. According to this classification all the prokaryotes and unicellular organisms are grouped under kingdom Monera and some in kingdom Protista.

Most of the animals are motile.

biology organization of life comparison of prokaryotic vs eukaryotic cells prokaryotic cell and eukaryotic cell types of cell

  1. True

  2. False

  3. Ambiguous

  4. Data insufficient

Show answer
Correct Option: A
Explanation:

Animals are multi-cellular and eukaryotic. Most of them are highly developed as compared to plants. They have a specific locomotory organ for moving from one place to another.