Discovery of the Cell

Q.

How can we observe the onion peel cells?

Q.

Who discovered the nucleus in the cell?

Q.

Which of the following is the largest single cell?

1. Human's sperm

2. Bacteria

3. Ostrich's Egg

4. Shark's egg

Q. How are cells formed?

Q. Which of the following chemicals are suitable for staining cells?

1. Methylene blue
2. Saffranin
3. Fast green
4. Red ink

Q. Why cells are called cells ?

Q. Why stained dyes are used to colour parts of cell?

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Q.

Cell is called the basic structural unit of life. Why?

1. Cell does not have any smaller parts within itself

2. All of the above

3. Cell is the smallest living entity which can survive on its own

4. Cell is basic in nature

Q. Which part of cell allows certain substances into and out of the cell

Q. Sarthak made a slide of specimen A and B respectively. After carefully examining the nucleus, he observed-
$\begin{array}{ccc}\text{Parameters}& \text{A}& \text{B}\\ \text{1. Nuclear membrane}& \text{Present}& \text{Absent}\\ \text{2. Well defined nucleus}& \text{Present}& \text{Absent}\end{array}$

Based on the information cited in the table, identify the specimen A and B.

1. Muscle cell, cheek cell
2. Bacterial cell, Rhoeo cell
3. Cheek cell, Rhoeo cell
4. Muscle cell, Bacterial cell

Q. Why Robert Hooke gave the names to the small structure as cells?

Q.

What are stains?

Q. Which of the following are unicellular organisms?

1. Amoeba
2. Chlamydomonas
3. Fish
4. Paramecium

Q. Robert Brown discovered the nucleus while observing the cells of _______.

1. lily
2. orchid
3. mango
4. onion

Q.

What is Altman's granules?

1. Nucleus

2. Mitochondria

3. Chloroplast

4. Golgi bodies

Q. How many cells are there in a human being?

Q. The given image is of a ___ cell.

Q. Which organelle controls all the function of a eukaryotic cell?

1. cytoplasm
2. centriole
3. ribosome
4. nucleus

Q.

The ___ of a hen is a single cell.

Q. Robert Brown discovered the nucleus in

1. pollen cell of orchids
2. Mesophyll cell of orchid leaves
3. Bark of oaktree
4. None of the above

Q. Why safranin is used to stain cells of an onion peel

Q. Cell organelles are present in the cytoplasm of a cell.

1. True
2. False

Q.

Which is the smallest cell?

Q. Nucleus was discovered by Robert Brown in ______.

1. Maize stem cells
2. Wheat stem cells
3. Orchid root cells
4. Bean root cells

Q. Which organelle controls all the function of a eukaryotic cell?

1. cytoplasm
2. centriole
3. ribosome
4. nucleus

Q. Robert Brown claimed that nucleus is an integral part of the cell in

1. 1858
2. 1831
3. 1650
4. 1773

Q.

Define cell.

Q.

_______________ is the basic structural unit of life.

1. Cell

2. Tissues

3. Nucleus

4. Chlorophyll

Q. The process of using chemicals to highlight certain parts of the cell for better visibility is called staining.

1. False
2. True

Q. How do you appreciate about the organization of cell in the living body? (AS ^)