Tag: component of the cell

Questions Related to component of the cell

Intermitosis is

biology division for growth and reproduction cell division in embryo development structure of chromosome, cell cycle and cell division component of the cell different types of reproduction reproductive health of humans need of family planning tissues of animals mitosis reproductive health

  1. Stage between meiosis I and meiosis II

  2. Stage between two mitotic divisions

  3. Interphase

  4. Both B and C

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Correct Option: A

How many chromosomes will the cell have at GI, after S and after M-phase respectively if it has 14 chromosomes at interphase

biology division for growth and reproduction cell division in embryo development structure of chromosome, cell cycle and cell division component of the cell different types of reproduction reproductive health of humans need of family planning tissues of animals mitosis reproductive health

  1. 7, 14, 14

  2. 14, 14, 14

  3. 14, 14, 7

  4. 7, 7, 7

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Correct Option: B
Explanation:

At G1 phase, there will be 14 chromosomes as no DNA replication has taken place. After S Phase, the DNA content doubles but chromosome number still remains same here 14. After completion of M phase, the number of chromosomes will be 28 with each daughter cell having same number of chromosomes as that of parent i.e 14

Therefore B is the correct option. 

Match the lists and choose the correct option:

a. $G _1$ phase i. Replication of DNA
b. S-phase ii. Quiescent stage
c. $G _2$-phase iii. Condensation chromatin
d. $G _0$-phase iv. Protein synthesis
v. Interval between mitosis and initiate of DNA replication
biology division for growth and reproduction cell division in embryo development structure of chromosome, cell cycle and cell division component of the cell different types of reproduction reproductive health of humans need of family planning tissues of animals mitosis reproductive health

  1. a-iii, b-ii, c-i, d-ii

  2. a-v, b-iv, c-i, d-iii

  3. a - v, b -i, c - iv, d-ii

  4. a v, b -ii, c-iii, d - iv

Show answer
Correct Option: C
Explanation:
Interphase generally lasts at least 12 to 24 hours in mammalian tissue. During this period, the cell is constantly synthesizing RNA, producing protein and growing in size. Interphase can be divided into 4 steps: Gap 0 (G0), Gap 1 (G1), S (synthesis) phase, Gap 2 (G2).
Gap 0 (G0): There are times when a cell will leave the cycle and quit dividing
Gap 1 (G1): Cells increase in size in Gap 1, produce RNA and synthesize protein.
S Phase: To produce two similar daughter cells, DNA replication occurs during this S (synthesis) phase.
Gap 2 (G2): During the gap between DNA synthesis and mitosis, the cell will continue to grow and produce new proteins.
Hence answer is 'a - v, b -i, c - iv, d-ii'

Which part of the cell is wrongly matched with its function?

bio-chemistry cell biology cytoplasm the components in a cell component of the cell

  1. Nucleus controls the activities of the cell

  2. Cytoplasm makes chlorophyll in green plants

  3. Cell wall protects a plant cell

  4. Cell membrane lets water and gas in and out of the cell

Show answer
Correct Option: B
Explanation:

The nucleus contains the genetic material of the cell and thus regulates all the activities of the cell.

Cytoplasm is the fluid present in the cell. It is present between plasma membrane and nucleus. it helps to maintain the shape of the cell and helps in distribution of cellular materials inside the cell.
Cell wall is a rigid covering mainly present in plant and bacterial cell and provides protection to the plant cell.
Cell membrane is a semipermeable membrane and it regulates the entry and exit of the molecules.
So, the correct answer is option B.

Which of the following is a part of protoplasm present between the nuclear membrane and cell organelle?

bio-chemistry cell biology cytoplasm the components in a cell component of the cell

  1. Leucoplast

  2. Nucleoplasm

  3. Cytoplasm

  4. None of the above

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Correct Option: C
Explanation:

Cytoplasm is a semi-fluid jelly like substance which contains various organelles and inclusions. It also contains a number of inorganic substances forming a clear true solution as well as organic substances like lipids, proteins and carbohydrates. It is homogenous and colourless in nature.

The peripheral zone of cytoplasm is thick and jelly like substance known as 

bio-chemistry cell biology cytoplasm the components in a cell component of the cell

  1. Plasmosol

  2. Nucleoid

  3. Plasmogel

  4. Plastid

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Correct Option: C
Explanation:

The peripheral zone of cytoplasm is a thick and jelly-like substance known as plasmogel. The neighbouring area of the nuclear region is thin and watery and is called as the plasmosol. It helps to regulate the amount of water needed by the cell in the cytoplasm.

So, the correct answer is option C.

A protoplast is

bio-chemistry cell biology cytoplasm the components in a cell component of the cell

  1. A cell organelle

  2. A cell with a wall

  3. A single wall-less cell

  4. Cell without nucleus

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Correct Option: C
Explanation:

Let's say, that we took a plant cell and used specific digestive enzymes to digest it's cell wall. 

After removing the cell wall, we call that cell as 'Protoplast'.
The protoplast typically consists of cytoplasm and plasma membrane but no cell wall.

Where, Cytoplasm is a fluid like substance present inside the plasma membrane and consisting of nutrients, biomolecules and all the cell organelles.
These cell organelles are such as mitochondria, ribosomes, endoplasmic reticulum, Golgi complex, Nucleus etc.

In the eukaryotic organisms such as plants and animals, nucleus is considered as the largest cell organelle.
Hence, the above explanation justifies the answer as option C  i.e., Protoplast is a single wall-less cell.

The main arena of various types of activities of a cell is

bio-chemistry cell biology cytoplasm the components in a cell component of the cell

  1. Nucleus

  2. Plasma membrane

  3. Mitochondria

  4. Cytoplasm

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Correct Option: D
Explanation:

The main arena of various types of cellular activities is the cytoplasm. Cytoplasm represents a bulk of protoplasm excluding nucleus and vacuoles. The inner part of cytoplasm is called as endoplasm and it is usually in perpetual motion called cyclosis or cytoplasmic streaming. Cytoplasm has various types of cell organelles. Cell organelles are highly organized subcellular protoplasmic structures that have a distinctive shape, chemical composition and function.

Select correct set of statements from given below.
A. The cytoplasm is the main arena of cellular activities in plants and animals. 
B. Cell envelope in bacteria is tightly linked 5 - layered structure.
C. The endomembrane system does not include semi-autonomous organelles.
D. Convex face of golgi bodies is maturing face.

bio-chemistry cell biology cytoplasm the components in a cell component of the cell

  1. A and D

  2. A and C

  3. A, C, D

  4. All are correct

Show answer
Correct Option: B
Explanation:
A. The cell organelles are present in the cytoplasm. Various cellular processes that are important for the survival of cell, occur in the cytoplasm.
B.  Cell envelope in bacteria is a two layered structure consisting of cell wall and cell membrane. In case of gram negative bacteria, an outer membrane is also present.
C. Endomembrane system includes endoplasmic reticulum, Golgi apparatus, vesicles and nuclear envelope. It does not include the semi-autonomous organelles i.e. chloroplast and mitochondrion.
D. Concave face or trans face of Golgi bodies is the maturing face.
Hence, statements A and C are correct.
So, the correct answer is 'A and C'.

What is a cytoplasm?

bio-chemistry cell biology cytoplasm the components in a cell component of the cell

  1. Irregularly shaped region within the cell that contains genetic material

  2. Storage bubbles found in cells

  3. Fluid content inside the plasma membrane

  4. Cells that lack cell membrane

Show answer
Correct Option: C
Explanation:

Cytoplasm can be defined as a thick solution that fills each cell and is enclosed by the cell membrane. It is mainly composed of water, salts and proteins. In eukaryotic cells, the cytoplasm includes all of the material inside the cell and outside of the nucleus. The cytoplasm is about 80% water and it is usually colourless.