Cell

Q. Which type of leucoplast stores fats and oil?

1. Amyloplast
2. Aleuroplast
3. Elaioplast
4. Chloroplast

Q.

A person likely to develop tetanus is immunized by administering?

1. dead germs

2. weakened germs

3. wide spectrum antibiotics

4. preformed antibiotics

Q.

Cell theory was proposed by Schleiden and Schwann.

1. Rudolf Von Virchow.
2. Robert Hooke.
3. Schleiden and Schwann.
4. Haeckel.

Q. Which of the following is an antibiotic?

1. Sodium bicarbonate
   
2. Alcohol
   
3. Yeast
4. Streptomycin

Q. Which of the following statement is NOT a part of cell theory?

1. Cell is the basic unit of life.
2. All cells arise from pre-existing cells.
3. All living organisms are composed of cells.
4. All living cells have cell walls.

Q. Penicillium is an example of _________.

1. algae
2. bacteria
3. protozoa
4. fungi

Q. Arrange the following discoveries regarding cells in chronological order from earliest to latest.

i. All plants and animals are made up of cells.
ii. Discovery of the microscope by Antonie Van Leeuwenhoek.
iii. Cork has structures like cell.

1. i, ii, iii
2. iii, ii, i
3. i, iii, ii
4. ii, iii, i

Q.

ANSWER IN ONE WORD

Name the small dose of dead and weakened disease causing microbe.

Q.

Secondary memory is also known as auxiliary memory. True or False

Q. Which scientists contributed to the development of cell theory?

1. Camillo Golgi
2. Schleiden
3. Schwann
4. Rudolf Virchow

Q. Select the incorrect statement about the working of vaccine.

1. The immune system acts with more vigour, everytime it encounters a specific microbe.
2. Weakened sample of the pathogen is inserted in the body.
3. The immune system remembers the microbe encountered the first time.
4. There are vaccines against tetanus and cancer.

Q.

Who among the following scientists concluded that "every cell comes from a pre-existing cell”?

1. Robert Hooke

2. Theodore Schwann

3. Rudolph Virchow

4. Anton van Leeuwenhoek

Q. Which of the following is a function of mitochondria?

1. Synthesis of proteins
2. Storage of salts and sugars
3. Energy generation
4. Packaging of proteins

Q.

Name the following:

Name of an antibiotic derived from fungus.

Q. "Cells arise from pre-existing cells". This was stated by Robert Hooke.

1. True

2. False

Q.

Question 23
Cell theory was given by

(a) Virchow, Haeckel and Hooke
(b) Schleiden, Schwann and Virchow
(c) Haeckel and Hooke
(d) None of these

Q. Who made the statement 'new cells arise from pre-existing cells'?

1. Virchow
2. Hooke
3. Haeckel
4. Schleiden

Q. Akash is experimenting with different types of cells to know which cell can withstand the hypotonic solution without bursting. He takes a plant cell and an animal cell and keeps them in a hypotonic solution.

What are the observations by Akash?

Q.

Which cell organelle lies outside cell membrane

Q.

Salk vaccine is used against tuberculosis.

1. True
2. False

Q. The specific cells that are specialised in killing infectious microbes are known as ___.

1. RBCs
2. skin cells
3. muscle cells
4. immune cells

Q.

Cell is the fundamental, structural and functional unit​ of all living organisms because:

Q.

What Is The Long Term Memory Used For?

Q.

Abhi observed the following cell parts of two different cells under a microscope. He recorded his observation in the table given.
$\begin{array}{ccc}\text{Parts of cell}& \text{Cell}{}^{\prime }{\text{X}}^{\prime }& \text{Cell}{}^{\prime }{\text{Y}}^{\prime }\\ \text{Cell wall}& \text{Present}& \text{Absent}\\ \text{Cytoplasm}& \text{Present}& \text{Present}\\ \text{Nucleus}& \text{Present}& \text{Present}\\ \text{Cell Membrane}& \text{Present}& \text{Present}\\ \text{Chloroplast}& \text{Present}& \text{Absent}\end{array}$

Identify 'X' and 'Y'

1. $\begin{array}{cc}\text{X}& \text{Y}\\ \text{Animal cell}& \text{Plant cell}\end{array}$

2. $\begin{array}{cc}\text{X}& \text{Y}\\ \text{Plant cell}& \text{Animal cell}\end{array}$

3. $\begin{array}{cc}\text{X}& \text{Y}\\ \text{Amoeba}& \text{Animal cell}\end{array}$

4. $\begin{array}{cc}\text{X}& \text{Y}\\ \text{Animal cell}& \text{Ameoba}\end{array}$

Q.

DPT vaccine is given for

1. Tetanus, polio, plague

2. Diptheria, whooping cough and leprosy

3. Diptheria, pneumonia, tetanus

4. Diptheria, whooping cough, tetanus

Q.

Cell wall is found only in _______________ cells.

Q.

Fumigation of houses and drains helps to control dengue. Give reason.

Q. The statement 'New cells arise from pre-existing cells' was made by .

1. Haeckel
2. Hooke
3. Schleiden
4. Virchow

Q.

_________ is one of the best-known antibiotics invented by Alexander Fleming, used to treat bacterial infections.

Q. Name any two human diseases caused by bacteria.