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Gen Science (Cell - Structure and Functions)

Description: Cell (M)
Number of Questions: 15
Created by:
Tags: Cell (M) Cells Physical and Life Science Cell Cell and Cell Division
Attempted 0/15 Correct 0 Score 0

Which of the following is a supportive framework of a cell?

  1. Endoplasmic reticulum

  2. Nucleus

  3. Lysosomes

  4. Plasma membrane


Correct Option: A
Explanation:

Endoplasmic reticulum is continuous with the cell membrane on the outside and the nuclear membrane on the inside. It is the supportive framework of a cell.

Which of the following digest(s) cartilages during formation of bones?

  1. Chromosomes

  2. Lysosomes

  3. Ribosomes

  4. Golgi apparatus


Correct Option: B
Explanation:

Lysosomes are known as suicidal bags. They digest cartilages during the formation of bones.

Which of the following give(s) turgidity to the plant cell?

  1. Granules

  2. Vacuoles

  3. Cell wall

  4. Cytoplasm


Correct Option: B
Explanation:

They store water and other substances like food, pigments and waste products. They provide turgidity to the plant cell.

Which of the following cells is specialised for receiving and transferring messages?

  1. RBC

  2. Nephron

  3. WBC

  4. Neuron

  5. Platelet


Correct Option: D
Explanation:

Neuron is the cell specialised for receiving and transferring messages.

Who is the father of modern embryology?

  1. Theophrastus

  2. K.V.Baer

  3. Darwin

  4. Lamarck


Correct Option: B

'Cisternae' (flattened sac like membranous structures) are usually found in

  1. Golgi complex

  2. Mitochondria

  3. Chloroplasts

  4. Nucleolus


Correct Option: A

A short phase found in between meiosis I and meiosis II during gamete formation is known as

  1. G1

  2. M

  3. interkinesis

  4. interphase


Correct Option: C
Explanation:

A short phase found in between meiosis I and meiosis II during gamete formation is interkinesis.

Mild cell lysis methods are not applicable for

  1. E.coli

  2. Animal cells

  3. Yeast

  4. Blood cels


Correct Option: C
Explanation:

Strong agitation methods are required

Which of the following type of cell signalling occurs when cells secrete signaling molecules into the blood?

  1. Paracrine signal

  2. Autocrine signal

  3. Endocrine signal

  4. Synaptic signal


Correct Option: C
Explanation:

Endocrine signals are called hormones. Hormones are produced by endocrine cells and they travel through the blood to reach all parts of the body.

Which of the following helps to observe cell division?

  1. Scanning electron microscope

  2. Transmission electron microscope

  3. Dark field microscope

  4. Light microscope


Correct Option: D
Explanation:

It helps to observe cell division

Colchicine is commonly called mitotic poison because it inhibits

  1. cell plate formation

  2. chromosome separation

  3. DNA replication

  4. formation of spindle fibres


Correct Option: D
Explanation:

Colchicine inhibits the integration of tubules needed for spindle formation.

Which of the following cell organelles helps in sulfation of molecules?

  1. Mitochondria

  2. Lysosomes

  3. Endoplasmic Reticulum

  4. Golgi Complex


Correct Option: D
Explanation:

Its main function is cell secretion and also helps in carbohydrate synthesis in which sulfation process occurs

Which of the following phenomenon describes the movement of sperm towards egg during fertilization?

  1. Active transport

  2. Chemokinesis

  3. Contraction

  4. Chemotaxis


Correct Option: D
Explanation:

It is the movement according to the presence of certain chemicals in environment.The sperm identifies the chemical secreted by egg and moves towards it

Crossing over takes place at a stage between

  1. leptotene and diplotene

  2. pachytene and diplotene

  3. zygotene and diplotene

  4. zygotene and pachytene


Correct Option: C
Explanation:

Crossing over takes place at a stage between zygotene and diplotene. Crossing over is the exchange of genes between two chromosomes, resulting in non-identical chromatids that comprise the genetic material of gametes (sperm and eggs).

Which of the following statements is not true?

  1. Every organism begins its life as a single cell.

  2. Cell division is performed by only higher multicellular organisms.

  3. About 20 million red blood cells in our body are destroyed every minute.

  4. Repair of injury is done by the process of cell division.


Correct Option: B
Explanation:

Cell division is performed by all the organisms, be it unicellular or multicellular.

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