Cell- structure and function MCQ

Cell- structure and function MCQ Quiz

QUESTION: 1

Cell membrane is also called:

• A. cell wall

• B. nucleolus

• C. cytoplasm

• D. PLASMA membrane

Solution:

Cell membrane is also called as cell membrane or PLASMA membrane. It forms the outer covering of the cell made up of protein and fat. It is semi-permeable in nature.

QUESTION: 2

Unit of inheritance in living organisms is :

• A. gene

• B. chromatin fibres

• C. protein

• D. chromosomes

Solution:

The transfer of traits from one generation to next generation is called inheritance. Inheritance is carried out by gene located in nucleus of the cell.

QUESTION: 3

Living substance of a cell is collectively known as :

• A.blood

• B. protoplasm

• C. nucleoplasm

• D. cytoplasm

Solution: Total living substance in cell is protoplasm... protoplasm is made up of cytoplasm and nucleus / nucleoplasm... [ Protoplasm = cytoplasm + nucleoplasm ] blood is not present in cell.

QUESTION: 4

Thread like structures present inside nucleus are :

• A. chromosomes

• B. ribosomes

• C. lysosomes

• D. all of them

Solution:

Chromosomes are thin thread like structure present inside nucleus of the cell. Chromosome consists of DNA and protein. Genes are located on chromosome.

QUESTION: 5

The fluid present between cell membrane and nucleus is :

• A. nucleoplasm

• B. protoplasm

• C. serum

• D. cytoplasm

Solution:

The fluid present between cell membrane and nucleus is called cytoplasm. Cytoplasm is thick fluid medium in which different cell organelles floats.

QUESTION: 6

Vacuoles of plant cells are

• A. permanent

• B. semi-permanent

• C. temporary

• D. impermeable

Solution:

Permanent vacuoles are found in plant cells and fungi cells. The permanent vacuole of Xylem cells join together to form the xylem.

QUESTION: 7

Unicellular organisms reproduce by :

• A. fission

• B. fragmentation

• C. vegetative propagation

• D. all of them

Solution:

Fission, in biology, is the division of a single entity into two or more parts and the regeneration of those parts to separate entities resembling the original.For unicellular organisms, cell division is the only method used to produce new individuals. In both prokaryotic and eukaryotic cells, the outcome of cell reproduction is a pair of daughter cells that are genetically identical to the parent cell. In unicellular organisms, daughter cells are individuals.

QUESTION: 8

Cell has ability to extract _____ energy from food molecules:

• A. ionic

• B. chemical

• C. mechanical

• D. kinetic

Solution:

Cells has ability to extract chemical energy from food molecules. The energy present in food molecules like glucose undergo respiration to produce chemical energy in form of ATP.

QUESTION: 9

Which of the following scientists discovered cells in cork slices?

• A. Louis Pasteur

• B. Antonie van Leeuwenhoek

• C. Robert Hooke

• D. Carl Linnaeus

Solution:

Robert Hooke in 1665 observed thin slices of cork under a simple magnifying device. He observed box-like structures and named them ‘cells’. This is because these structures reminded him of the cells in a monastery.

QUESTION: 10

Membrane of nucleus is porous so it :

• A. allows movement of chromosomes out of nucleus

• B. allows exchange of cell organelles

• C. allows transport of specific proteins

• D. allows leakage of genes into cytoplasm

Solution:

The membrane of nucleus is porous so it allows transport of specific proteins. Nucleus is also called as brain of the cell.

QUESTION: 11

Identify the statement which is true for cells.

• A. Cells can be easily seen with naked eyes.

• B. Insect's egg is not a cell.

• C. A single cell can perform all the functions in a unicellular organism.

• D. The size and shape of cells is uniform in multicellular organisms

Solution:

Cells are called as the structural and functional unit of life because all the living organisms are made up of cells and also all the functions taking place inside the body of organisms are performed by cells. The unicellular organism is made up of a single cell and performs all the life processes for survival. Thus, the correct answer is option C.

QUESTION: 12

Plasma membrane is a :

• A. bilayered membrane

• B. trilayered membrane

• C. five layered membrane

• D. unilayered membrane

Solution:

Plasma membrane is a bilayered membrane made up of protein and lipid. It is selectively permeable to different substances.

QUESTION: 13

Which of the following is a locomotory organelle in protozoa ?

• A. pseudocoelom

• B. tentacles

• C. flagella

• D. all of them

Solution:

Flagella is a locomotory organelle in protozoa. Flagella is long hair like projection on the body of some protozoa.

QUESTION: 14

Power house of the cell is :

• A. mitochondria

• B. chloroplast

• C. ribosome

• D. nucleus

Solution:

Mitochondria is called as powerhouse of the cell because it contain enzyme for cellular respiration in which energy is released in form of ATP.

QUESTION: 15

Which of the following is selectively permeable?

• A. cell membrane

• B. cell wall

• C. plasmid membrane

• D. capsule

Solution:

Cell membrane is a selectively permeable membrane because it allow some substance to cross but prevents the other.

QUESTION: 16

Plant cell wall is made up of :

• A. cellulose

• B. peptidoglycan

• C. cutin

• D. cuticle

Solution:

The cell wall of plant is made up of cellulose. Cellulose is a complex sugar which cannot be digested by human beings.

QUESTION: 17

Which of the following group is prokaryotes ?

• A. brown algae

• B. protozoa

• C. both blue-green algae & brown algae

• D. blue-green algae

Solution:

The cell which lack well developed nuclear membrane is called prokaryotic organism. Blue green algae and amoeba are example of prokaryotic organism.

QUESTION: 18

Which of the following occurs only in animal cell?

• A. chromosomes

• B. centrosomes

• C. dictyosomes

• D. ribosomes

Solution:

Centrosomes are present only in animals cell. Centrosome produces fimbriae that help in cell division. Chromosome and ribosome are present in both animal and plant cell.

QUESTION: 19

The plastid responsible for fruit colour is :

• A. chromoplast

• B. amyloplast

• C. chloroplast

• D. leucoplast

Solution:

The colour of the plant is due to presence of different kinds of plastids. Chromoplast provides all colours except green and white.

QUESTION: 20

Which of the following occurs only in plant cell?

• A. centrosomes

• B. dictyosomes

• C. ribosomes

• D. mitochondria

Solution:

Dictyosomes are present only in plant cell. Centrosomes is present in animals cells only and mitochondria and ribosomes are present in both plant and animal cell.