Cell Wall

Q. Which layer of developing microsporangium nourishes developing pollen grains?

1. Epidermis
2. Endothecium
3. Middle layer
4. Tapetum

Q. The root endodermis because of the layer of suberin has the ability to actively transport ion in one direction only . Explain the above sentence and clear the role of suberin.

Q. Outermost layer of cell wall is

1. plasma membrane
2. secondary wall
3. middle lamella
4. primary wall

Q.

What is the role of tight junctions?

Q.

Why does a plant cell remain more rigid than an animal cell?

Q.

Are cilia present in prokaryotes?

Q.

Are bacterial cell walls and plant cell wall similar?

Q.

The cell wall of a young plant cell, the primary wall is capable of growth, which gradually diminishes as the cell matures and the secondary wall is formed on the

1. Outer $\left(\text{towards membrane}\right)$ side of the cell

2. Outer $\left(\text{towards middle lamella}\right)$ side of the cell

3. Inner $\left(\text{towards membrane}\right)$ side of the cell

4. Inner $\left(\text{towards middle lamella}\right)$ side of the cell

Q. The innermost wall layer of microsporangium nourishing the developing pollen grains is known as:

1. Endothecium
2. Tapetum
3. Sporogenous tissue
4. Endodermis

Q.

Why do plant cells have more golgi bodies than animal cells?

Q. Chitin and polysaccharides are the chemical constituents of the cell wall of

1. blue-green algae
2. bacteria
3. yeast
4. plant cells

Q.

The term cell was coined by whom and why?

Q. Algin is a phycocolloid, obtained from the cell wall of

1. Mastigocladus and Laminaria
2. Microcystis and Nereocystis
3. Macrocystis and Fucus
4. Macrocystis and Porphyridium

Q. What are fungal cell walls made of?

1. Plant cell walls are composed of peptidoglycan
2. Fungal cell walls are composed of cellulose
3. Fungal cell walls are composed of chitin
4. Bacterial cell walls are composed of lignin

Q. Plasmodesmata are

1. locomotory structures
2. membranes connecting the nucleus and the plasma membrane
3. lignified cement between cells
4. connections between adjacent cells

Q.

Is cell wall present in Euglenoids?

Q. The most abundant material in a plant cell wall is

1. cellulose
2. hemicellulose
3. starch
4. pectin

Q.

Are all plants unicellular?

Q. Collenchyma differs from parenchyma in having

1. Living protoplasm
2. Cellulose walls
3. Pectin deposits at corners
4. Vacuoles

Q. In which portion of the chloroplast, pH is higher after ATP synthesis occurs through chemiosmosis in thylakoids?

1. Stroma
2. Lumen
3. Space enclosed by the inner and outer membrane
4. Space enclosed by the thylakoid membrane

Q. Significance of 'heat shock' method in bacterial transformation is to facilitate:

1. Expression of antibiotic resistance gene
2. Uptake of DNA through membrane transport proteins
3. Uptake of DNA through transient pores in the bacterial cell wall
4. Binding of DNA to the cell wall

Q. Which group of kingdom Protista is being described in the statements given below?
(i) This group includes diatoms and golden algae.
(ii) They are microscopic and float passively in water currents (plankton).
(iii) Most of them are photosynthetic.
(iv) They are responsible for diatomaceous earth.

1. Chrysophytes
2. Dinoflagellates
3. Euglenoids
4. Slime moulds

Q. Cellulose is the major component of cell walls of:

1. Pseudomonas
2. Saccharomyces
3. Pythium
4. Xanthomonas

Q.

1. DNA -> Nucleosome -> Solenoid -> Chromatin fibre -> Chromatid -> Chromosome
2. Nucleosome -> Solenoid -> Chromatin fibre -> Chromatid -> DNA -> Chromosome
3. DNA -> Chromosome -> Chromatin fibre -> Chromatid -> Solenoid -> Nucleosome
4. DNA -> Solenoid -> Chromatin fibre -> Chromatid -> Chromosome -> Nucleosome

Q. The inner most layer of microsporangium is:

1. Tapetum
2. Endothecium
3. Middle layer
4. Epidermis

Q.

Do plants have flagella?

Q.

The pathway of the movement of water through the cell wall and intercellular space only is called

1. Plasmodesmata pathway

2. Vacuolar pathway

3. Symplast pathway

4. Apoplast pathway

Q.

Plant cells have a _________ that is rigid and non-living.

Q. In which portion of the chloroplast, pH is higher after ATP synthesis occurs through chemiosmosis in thylakoids?

1. Stroma
2. Lumen
3. Space enclosed by the inner and outer membrane
4. Space enclosed by the thylakoid membrane

Q.

What is bacteria cell envelope?