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Fundamental Unit of Life - 9th Science > MCQs > Flashcards

MCQs Flashcards

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1
Q

Which plastids are colourless?

Chromoplast
Chloroplast
Leucoplasts
All of the above

A

Leucoplasts

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2
Q

The phenomenon where cytoplasms shrink in a hypertonic medium is called:

Frontolysis
Plasmolysis
Acidolysis
Allolysis

A

Plasmolysis

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3
Q

________ is called the energy currency of the cell

Endoplasmic reticulum
Oxygen
ATP
Mitochondria

A

ATP

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4
Q

__________ is called the powerhouse of the cell

Mitochondria
ATP
Lysosomes
Red blood cells

A

Mitochondria

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5
Q

An unripe green fruit changes colour when it ripens. The reason being:

Chromoplasts changes to chlorophyll Chromoplasts changes to chromosomes
Chromosomes changes to chromoplasts Chloroplast changes to chromoplasts

A

Chloroplast changes to chromoplasts

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6
Q

__ coined the term “cell.”

Gorbachev
Himmler
Robert Hooke
Antonie van Leeuwenhoek

A

Robert Hooke

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7
Q

Which of the following statements is incorrect?

Cytoplasm is also known as protoplasm
Lysosomes are known as the suicide bags of the cell
Mitochondria has its own DNA
All of the above are incorrect

A

Cytoplasm is also known as protoplasm

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8
Q

**Which of the following is not a function of the vacuole in plants? **

They store toxic metabolic wastes
They help with the process of cell division
They help to maintain turgidity
They provide structural support

A

They help with the process of cell division

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9
Q

**Where are the essential proteins and lipids required for cell membrane, manufactured? **

Lysosome
Chromosomes
Endoplasmic reticulum
Mitochondria

A

Endoplasmic reticulum

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10
Q

**The process by which water moves through a semi-permeable membrane from a region of high concentration to a region of lower concentration, thereby equalizing water concentration is called: **

Evaporation
Diffusion
Osmosis
All of the above

A

Osmosis

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11
Q

The organelle that is called the powerhouse of the cell is __

Golgi bodies
Lysosomes
Mitochondria
Ribosome

A

Mitochondria

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12
Q

**Vacuoles provide: **

Rigidity
Turgidity
Shape
Both (a) and (b)

A

Turgidity

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13
Q

The process which occurs when dry raisins are soaked in water is called ___

Osmosis
Endosmosis
Endocytosis
Diffusion

A

Endosmosis

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14
Q

**Before scraping the inner side of cheek to prepare a temporary mount of cheek cell, the mouth is rinsed to: **

remove food particles
make it alkaline
avoid injury
make it acidic

A

make it acidic

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15
Q

An undefined nuclear region of Prokaryotes is known as ____

nucleus
nucleoid
nucleolus
nucleic acid

A

nucleoid

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16
Q

**While observing an onion peel slide under the microscope, Paheli noted its characteristics. Which of these does she not see? **

Cells attached edge to edge without intercellular space
Presence of single nucleus in the cell
Presence of cell wall around each rectangular cell
All of these

A

Presence of cell wall around each rectangular cell

17
Q

**Which one of the following has their own DNA? **

Vacuole
Mitochondria
Golgi bodies
Ribosome

A

Vacuole

18
Q

**A cover slip is placed over the specimen to: **

prevent the tissue from drying
prevent glycerine from leaking out
remove extra stain and water
crush the cells in order to see the organelles clearly

A

crush the cells in order to see the organelles clearly

19
Q

While observing a human cheek cell, under a microscope, what students will not observe

Nucleolus
Mitochondria
Nucleus
Chloroplast

A

Nucleolus

20
Q

**To prepare a temporary stained mount of onion peel, a student must take the material from the: **

green leaf of spring onion
thin layer of fleshy leaf base of onion
dry scale leaf of onion
crushed pulp of onion

A

thin layer of fleshy leaf base of onion

21
Q

A cell organelle that is not surrounded by a membrane is the ______

chloroplast
ribosome
endoplasmic reticulum
Golgi apparatus

A

ribosome

22
Q

**Gaseous exchange in cells takes place by: **

Exocytosis
Diffusion
Osmosis
Endocytosis

A

Diffusion

23
Q

**Given below are four operations for preparing a temporary mount of human cheek cells: Identify the correct sequence of these operations.
(i) Taking a scraping from the inner side of the cheek and spreading it on a clean slide
(ii) Putting a drop of glycerine on the material
(iii) Adding two or three drops of methylene blue
(iv) Rinsing the mouth with fresh water and disinfectant solution **

(i)—(ii)—(iii)—(iv)
(iv)—(i)—(iii)—(ii)
(iv)—(i)—(iii)—(ii)
(i)—(iii)—(ii)—(iv)

A

(iv)—(i)—(iii)—(ii)

24
Q

**Human cheek cells stained in methylene blue and mounted in glycerine were observed with the help of a compound microscope. The components of the cell which were seen are: **

cell wall, cytoplasm, nucleus
plasma membrane, cytoplasm, nucleus, mitochondria
plasma membrane, cytoplasm, nucleus
plasma membrane, cytoplasm, nucleus, mitochondria, lysosomes, Golgi bodies.

A

plasma membrane, cytoplasm, nucleus

Fundamental Unit of Life - 9th Science (1 decks)

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