Biology Class 9th

241. Nucleus is bounded by double Membrane:

A) Cell Membrane

B) Cell Wall

C) Nuclear Envelope

D) None of the above.

242. The Granular Matrix present in Nucleus is called:

A) Nucleoplasm

B) Nuclear Envelope.

C) Nucleoli

D) Central Vacuole.

243. The Chromosomes are more visible:

A) During Normal Functioning

B) Before Death of Cell.

D) Anaphase

D)  Dividing Phase

244. ‘__________ controls all activities of the cell.

A) DNA

B) RNA

C) Nucleus

D) Ribosome.

245. No of Chromosomes is :

A) 35

B) 45

C) 46

D) 60

246. Prokaryotic Cells lack:

A) Membrane bounded Nucleus

B) Membrane Bounded Organelles.

C) A and B

D) None of the above

247. In Plant _______, conduct water from roots to upper part.

A)  Phloem Cells

B) Xylem Cells

C) Cork Cells

D) Root Cells.

248. Red blood cells do the task of:

A) Conducting Impulses throughout the body

B) Transport  Oxygen

C) Kill foreign particles

D) Deposit Calcium to bones

249. ____________ kill foreign particles in body.

A) Plasma

B) White Blood Cells

C) Red Blood Cells.

D) Nerve Cells.

250. Which of the following is the largest cell?

A) Bird Egg.

B)  Bone Cells

C) Muscle Cells

D) Nerve cell

251. Surface area of a large cell is:

A) 5400µm

B) 5000µm

C) 5450 µm

D) 5455µm

252. Movement of substance from the region of higher concentration to region of lower concentration is called:

A) Effusion

B) Diffusion

C) Osmosis

D) Reverse Osmosis.

253. Diffusion is called Passive transport because:

A) No energy is needed by the Cell Membrane to move the molecule through.

B) This does not occur commonly.

C) Energy is required to move the molecule.

D) None of the above.

254. The Diffusion of solvent through semi permeable membrane is called:

A) Diffusion

B) Effusion

C)  Osmosis

D) Reverse Osmosis

255. Water always moves from ________ solution to _________ solution.

A) Hypertonic, Hypotonic

B) Hypotonic, Hypertonic

C) Hypotonic ,Hypotonic

D) None of the above.

256. A Hypertonic Solution has:

A) Higher Concentration of Solute than solvent

B) Lower Concentration of Solute than Solvent

C) Equal Amounts of Solvent and Solute.

D) No Solute.

257. An Isotonic Solution has:

A) Less amount of Solute than Solvent

B) Equal amount of Solute and Solvent

C) Higher amount of Solute as compared to Solvent.

258. When a Animal Cell is placed in Hypertonic Solution it :

A) Swells up and may Rupture

B) Retain its Volume and Shape.

C) Becomes Flaccid.

D) Shrinks in Size

259. The water moves inside the cell’s vacuole by:

A) Diffusion

B) Effusion

C) Osmosis

D) Reverse Osmosis

260. The Pressure exerted by the ______ against the cell wall is called Turgor Pressure.

A) Vacuole

B) Cytoplasm

C) Cytoskeleton.

D) None of the Above.