3. An Overview of Cell

Question 1

In typical plant cells, the outer boundary is a distinct Cell wall and within it cell membrane is present.
T/F

Answer 1

True

Question 2

In animal cells, ____ is the delimiting structure.

Answer 2

Cell membrane

Question 3

Chromosomes are located inside a dense structure called ____.

Answer 3

Nucleus

Question 4

Which is Prokaryotic or Eukaryotic

1. Primitive Nucleus -
2. Tue Nucleus -

Answer 4

1. Primitive Nucleus - Prokaryotic
2. Tue Nucleus - Eukaryotic

Question 5

Cells that possess membrane-bound nuclei or organelles are called ____

Answer 5

Eukaryotic cells

Question 6

Cells that lack nuclear envelopes or membrane-bound organelles are called ____.

Answer 6

Prokaryotic cells

Question 7

Most of the cell volume is occupied by a semifluid matrix called as ____

Answer 7

Cytoplasm

Question 8

____ is the main arena of cellular activities in both plant and animal cells.

Answer 8

Cytoplasm

Question 9

Various chemical reactions occur in it to keep the cell in its ‘living state’.
T/F

Answer 9

True

Question 10

____ is the universal organelle. Why?

Answer 10

Ribosome, because it is found in both Prokaryotes & Eukaryotes.

Question 11

____ organelle is called Protein Factory and Paladeparticle as discovered by George Palade.

Answer 11

Ribosome

Question 12

Ribosomes are ____ (membrane/non-membrane) bound organelle.

Answer 12

non-membrane bound

Question 13

Ribosomes are present in cytoplasm and
1. Within ____ & ____
2. On ____

Answer 13

1. Within chloroplasts (in plants) & mitochondria
2. On Rough ER

Question 14

Svedberg’s unit or Sedimentation Coefficient of ribosomes in:
1. Prokaryotes:
2. RER of Eukaryotic:
3. Mitochondria of Eukaryotic:
4. Chloroplast of Eukaryotic:

Answer 14

1. Prokaryotes: 70s [50s + 30s]
2. RER of Eukaryotic: 80s [60s + 40s]
3. Mitochondria of Eukaryotic: 70s
4. Chloroplast of Eukaryotic: 70s

Question 15

Animal cells contain another ____ (membrane/non-membrane) bound organelle called ____ which helps in cell division.

Answer 15

Non-membrane; Centrosome

Question 16

The shape of the cell may vary with the function it performs.
T/F

Answer 16

True

Question 17

____ are the smallest living cells.

Answer 17

Mycoplasma

Question 18

____ is the largest isolated single cell.

Answer 18

An egg of Ostrich

Question 19

_______ are some of the longest cells.

Answer 19

Nerve cells

Question 20

Cell Size:

1. Virus -
2. PPLO -
3. Mycoplasma -
4. Typical Bacteria -
5. Bacteria -
6. Human RBCs -
7. Typical Eukaryotic cell -

Answer 20

1. Virus - 0.02-0.2 μm
2. PPLO - 0.1 μm (in Diameter)
3. Mycoplasma - 0.3 μm (in length)
4. Typical Bacteria - 1-2 μm
5. Bacteria - 3-5 μm
6. Human RBCs - 7 μm (in Diameter)
7. Typical Eukaryotic cell - 10-20 μm

Question 21

Cell Shape:

1. RBCs -
2. WBCs -
3. Nerve cell -
4. Columnar Epithelial Cell -
5. Mesophyll Cell -
6. Tracheids -

Answer 21

1. RBCs - Round Biconcave disc-like
2. WBCs - Amoeboid Irregular
3. Nerve cell - Branched & Long
4. Columnar Epithelial Cell - Long & Narrow
5. Mesophyll Cell - Round & Oval
6. Tracheids - Elongated