biology Mcqs
1151. The diffusion of ions along with water also takes place by mass flow system along the ________ path?
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A. Tonoplast

B. Symplast

C. Apoplast

D. Vacuolar

1152. Tobacco mosaic virus was crystallized by__________?
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A. Stanely

B. Ivanowski

C. Pasteur

D. Chamberland

1153. In HomoSapiens (Human) the fertilization occurs in the___________?
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A. Ovaries

B. Cervix

C. Oviduct

D. Uterus

1154. Cell wall is richly impregnated with silica in__________?
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A. Baciliariophyta

B. Euglenophyta

C. Rhodophyta

D. Phaeophyta

1155. The site/s where most of the uptake of water and minerals take place is/are__________?
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A. Root cells

B. Root hairs

C. Underground stem

D. All of these

1156. _________ give rise to macrophages, which destroy larger particles by phagocytosis.
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A. Basophila

B. Monocyte

C. Lymphocyte

D. Nautrophils

1157. Which of the following is not nocturnal?
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A. Cockroach

B. Mosquito

C. Butterfly

D. Bedbug

1158. Simple tissues and complex tissues are two groups of_________tissues.
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A. Meristematic

B. Supporting

C. Permanent

D. Epidermal

1159. Flagella are composed of________?
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A. intermediate filaments

B. micro tubules

C. glycoproteins

D. micro filaments

1160. Which of the following statement about Homeostasis is incorrect?
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A. Homeostatic mechanisms keep the internal environment fixed despite of wide changes in external environment

B. All are correct

C. Because of this the fluctuations of internal environment are of extremely narrow range as compared to that of external environment

D. There is a definite control system that regulates the homeostatic activities

1161. There are __________ types of nutrients needed by plants besides light to carry out photosynthesis
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A. Three

B. Five

C. Four

D. Two

1162. The opening and closing of stomata is directly controlled by the___________?
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A. Temperature

B. pH

C. None of these

D. Light
1163. Most of the marine invertebrates are__________?
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A. Osmoconformers

B. Osmoregulators

C. Both depend upon the concentration of sea water

D. None of these

1164. Which of the following animal excrete nitrogenous waste mainly as uric acid?
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A. Planaria.

B. Birds.

C. Hydra

D. Humans

1165. Release of the ovum from ovary is called__________?
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A. ovulation

B. implantation

C. none of these

D. fertilization

1166. Which of the following statement about conifers is correct?
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A. Production of black wood in the center.

B. Excrete some of the waste materials directly into soil, occasionally using them as a chemical weapon against other competing plants.

C. Accumulate waste in leaves, which fall in autumn.

D. Stored excretory products in vacuoles, at a concentration that leads to crystal formation.

1167. In all arthropods,the body is covered with a chittinous cuticle which is secreted by the____________?
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A. Endodermis

B. Chitin

C. Mesophyll

D. Epidermis
1168. The movement of water molecules from a region of higher water potential to a region of lower water potential (through membrane)
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A. Active transport

B. Osmosis

C. None of these

D. Deffusion

1169. Which of the following structure in plants body is called excretophores?
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A. Stem

B. Flowers

C. Leaves

D. Roots

1170. Amoeba secretes digestive enzymes to hydrolyse _________ ?
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A. Sugar

B. Proteins

C. All of these and fats

D. Starch

1171. All plants do not possess___________?
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A. Stomata

B. Lenticels

C. Cuticle

D. All of these

1172. Which of the following is a sentimentally arranged excretory system?
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A. Metanephridium

B. Malpighian tubules

C. Nephrons

D. Protonephridium

1173. It is the measure of force with which blood pushes up against the walls of blood vessels.
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A. Stroke volume

B. Blood flow

C. Blood pressure

D. Cardiac output

1174. The life and activities of a cell is controlled by__________?
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A. nucleus

B. mitochondria

C. cytoplasm

D. vacuole

1175. Each ach nephridium of earthworm opens to the exterior by__________?
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A. Nephridiopore

B. Anus

C. Flame cell

D. Nephrostome

1176. There are _________ hypothesis which may explain opening and closing of stomata?
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A. Two

B. Four

C. Three

D. One

1177. How many vertebrae are in sacrum?
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A. 5

B. 12

C. 4

D. 7

1178. Shrinkage of protoplast due to exosmosis of water is__________?
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A. plasmolysis

B. adhesion

C. imbibition

D. deplasmolysis

1179. In plants there are_______basic types of tissues?
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A. 3

B. 4

C. 2

D. None of these

1180. Aquatic animals excrete nitrogenous waste commonly in the form of_____________?
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A. Trimethylamine oxide

B. Uric acid

C. Urea

D. Ammonia
1181. The light microscope can make the object_________times bigger?
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A. 100 times

B. 10 times

C. 1000 times

D. 10000 times

1182. Many bacteria in our digestive system synthesize vitamins for example vitamin_________?
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A. B2

B. B6

C. B12

D. B1

1183. Empty diatom cells are called___________?
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A. Raphe

B. Valves

C. Frustule

D. Girdles

1184. The uptake of water in plants involves__________?
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A. Active transport

B. Passive transport

C. Both of these

D. None of these

1185. Detachment of myosin head and actin in rigor mortis occurs due to__________?
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A. hyperactivity of mitochondria

B. hypercalcemia

C. autolysis in body

D. stored ATP in body

1186. Water potential of pure water is__________?
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A. negative

B. one

C. zero

D. two

1187. Excessive lactic acid is converted into __________ by liver?
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A. Fructose

B. Sucrose

C. Glucose

D. Glycogen
1188. Human brain contains__________neurons.
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A. 100,000,000,000

B. 10,000,00

C. 1000

D. 100,000,000

1189. The body of ________ is not made of cell.
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A. Algae

B. Bacteria

C. Fungi

D. Viruses

1190. Scolidon or dog fish belong to the group of fishes called__________?
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A. Jawless fishes

B. Bony fishes

C. Running fishes

D. Cartilaginous fishes
1191. Which one of the following vitamin is known as the anti- Sterile factor?
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A. Riboflavin

B. Retinol

C. Ascorbic acid

D. a-tocopherols

1192. Snails belong to_________?
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A. bivalves

B. arthropods

C. gastropods

D. platyhelminthes

1193. which of the following hepatitis is more contagious ?
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A. HCV

B. HBV

C. HAV

D. HDV

1194. Diatoms stay afloat due to___________?
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A. Stored lpids

B. Flagella

C. All of these

D. Pseudopodia

1195. Which of the following are proteins in nature?
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A. Interferons

B. All of these

C. Antibodies.

D. Antitoxins

1196. Liver fluke is parasite in the liver of__________?
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A. all of these

B. goat

C. cattle

D. sheep

1197. Which of the following is true about hearts of earthworm?
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A. They pump blood from ventral to dorsal vessel.

B. There are 5-7 pairs of heart.

C. They are present between 1-7th segments.

D. They are present lateral to the oesophagus.
1198. Lenticels look like__________?
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A. Cars or small protusions

B. A big pore

C. Sponge

D. Stoma

1199. Which of the following treatment will be administered first in a newly diagnosed renal failure patient?
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A. Lithotripsy

B. Renal transplant

C. Peritoneal Dialysis

D. Hemodialysis
1200. Single circuit heart is found in_________?
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A. Fishes

B. Reptiles

C. Amphibians

D. Mammals