Tag: organization of life

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Questions Related to organization of life

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

Prokaryotic cells bear smaller nucleus as compared to eukaryotic cells.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
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. 

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

How is a prokaryotic cell different from a eukaryotic 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
Reveal answer Fill a bubble to check yourself
C Correct answer
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.
Multiple choice biology organization of life comparison of prokaryotic vs eukaryotic cells prokaryotic cell and eukaryotic cell types of cell

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

  1. DNA

  2. RNA

  3. Cell wall

  4. A well defined nucleus
Reveal answer Fill a bubble to check yourself
D Correct answer
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.

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

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

  1. Cell membrane, endoplasmic reticulum, vacuoles

  2. Cell wall, plasma membrane, mitochondria

  3. Cell wall, nucleus, cytoplasm

  4. Plasma membrane, cytoplasm, ribosomes
Reveal answer Fill a bubble to check yourself
D Correct answer
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. 

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

Choose the difference between prokaryotes and eukaryotes?

  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.
Reveal answer Fill a bubble to check yourself
B Correct answer
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. 

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

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

  1. Mitochondria

  2. Cell wall

  3. Genetic system

  4. Distinct nucleus
Reveal answer Fill a bubble to check yourself
D Correct answer
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.

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

All animals are eukaryotes and multi-cellular.

  1. True

  2. False

  3. Ambiguous

  4. Data insufficient
Reveal answer Fill a bubble to check yourself
A Correct answer
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.

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

The numbers of vacuoles are __________ in animals are compared to plants.

  1. More

  2. Less

  3. Same

  4. Can't define
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Plants don't have excretory system, thus possess larger vacuole to store their waste metabolites. Whereas animals have comparatively smaller vacuoles used for storage's of food materials. Thus the number of vacuoles in animal cell would be larger due to its size as compared to plants.

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

Bacteria differ from eukaryotes in absence of

  1. DNA

  2. Basic proteins

  3. Histones

  4. Both B and C
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Prokaryotic cells synthesize a set of small, usually basic proteins that bind DNA and are collectively called histone- like proteins because their biochemical properties resemble eukaryotic histones but histones are absent in Bacteria

So, the correct answer is 'Histones'