MCQOPTIONS
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MCQOPTIONS
This section includes 1275 Mcqs, each offering curated multiple-choice questions to sharpen your Biology Mcqs knowledge and support exam preparation. Choose a topic below to get started.
| 251. |
Double fertilization is feature of____________? |
| A. | Ferns |
| B. | Whisk ferns |
| C. | Gymnosperms |
| D. | Angiosperms |
| Answer» E. | |
| 252. |
Which of the following is the basic unit of classification___________? |
| A. | Species |
| B. | Genus |
| C. | Family |
| D. | Order |
| Answer» B. Genus | |
| 253. |
Breakdown of large molecules into smaller ones utilizing water molecules is_________? |
| A. | Hydration |
| B. | Hydrolysis |
| C. | Dehydration synthesis |
| D. | Electrolysis |
| Answer» C. Dehydration synthesis | |
| 254. |
If bile pigments are prevented from leaving digestive tract, then they cause_____________? |
| A. | Hepatitis |
| B. | Jaundice |
| C. | Gall stones |
| D. | Blockage |
| Answer» C. Gall stones | |
| 255. |
The arrangement of _________ speaks of the division of labour within cell? |
| A. | Molecule |
| B. | Subatomic particles |
| C. | Atoms |
| D. | Organelles |
| Answer» E. | |
| 256. |
Initial pH of food vacuole during digestion in amoeba is____________? |
| A. | 5.3 |
| B. | 5.6 |
| C. | 7.3 |
| D. | 7.6 |
| Answer» C. 7.3 | |
| 257. |
Intake of liquid material by cell membrane is called___________? |
| A. | Endocytosis |
| B. | Exocytosis |
| C. | Phagocytosis |
| D. | Pinocytosis |
| Answer» E. | |
| 258. |
___________ is concerned with cell secretions? |
| A. | Endoplasmic reticulum |
| B. | Golgi complex |
| C. | Lysosomes |
| D. | Cell membrane |
| Answer» C. Lysosomes | |
| 259. |
___________ is used to relieve one kind of headache, migraine? |
| A. | Pencillin |
| B. | Lovastatin |
| C. | Cyclosporine |
| D. | Ergotin |
| Answer» E. | |
| 260. |
Sythetic insulin from pork was formed by which technique__________? |
| A. | Parasitology |
| B. | Social biological techniques |
| C. | Biotechnology |
| D. | Both a and c |
| Answer» D. Both a and c | |
| 261. |
Out of 92 naturally occurring chemical elements how many are considered as bio-elements__________? |
| A. | 6 |
| B. | 16 |
| C. | 26 |
| D. | 15 |
| Answer» C. 26 | |
| 262. |
Cytoskeleton involved in assembly and disassembly of the spindle during mitosis is of_________? |
| A. | Microtubules |
| B. | Microfilaments |
| C. | Intermediate filaments |
| D. | None of these |
| Answer» B. Microfilaments | |
| 263. |
It is possible to date the rocks by comparing the amount of specific radioactive isotopes they contain. Which of the statement is correct in this respect: |
| A. | Older sediment layers have equal amount of these reaioactive isotopes as that of the young ones |
| B. | Older sediment layers have less amount of these reaioactive isotopes as that of the young ones. |
| C. | Older sediment layers have greater amount of these radioactive isotopes as that of the young ones. |
| D. | Older sediment layers did not have these radioactive isotopes |
| Answer» C. Older sediment layers have greater amount of these radioactive isotopes as that of the young ones. | |
| 264. |
Bacteria which grow either in the presence or absence of oxygen___________? |
| A. | Aerobic bacteria |
| B. | Anaerobic bacteria |
| C. | Facultative bacteria |
| D. | Microaerophilic |
| Answer» D. Microaerophilic | |
| 265. |
Unbroken series of organisms arranged from ancestor to descendant sequence is____________? |
| A. | Biodiversity |
| B. | Phyletic lineage |
| C. | Connecting link |
| D. | Evolutionary line |
| Answer» C. Connecting link | |
| 266. |
In animals coordination is achieved by means of_________? |
| A. | Respiratory system |
| B. | Nervous system |
| C. | Endocrine system |
| D. | Both b and c |
| Answer» E. | |
| 267. |
A large regional community primarily determined by climate is called__________? |
| A. | Population |
| B. | Community |
| C. | Biome |
| D. | Habitat |
| Answer» D. Habitat | |
| 268. |
Branch of biology which deals with the study of chemical components and chemical processes in living organisms is called________________? |
| A. | Molecular biology |
| B. | Physiology |
| C. | Biochemistry |
| D. | Atomic biology |
| Answer» D. Atomic biology | |
| 269. |
Oxygen accounts for __________ percent of totals human body mass? |
| A. | 65% |
| B. | 18% |
| C. | 10% |
| D. | 3% |
| Answer» B. 18% | |
| 270. |
A structure formed by groups of similar cells organized into loose sheetsor bundles performing similar functions is called as________? |
| A. | An organ |
| B. | An organism |
| C. | A Tissue |
| D. | A Cell |
| Answer» D. A Cell | |
| 271. |
The branch of biology which deals with the study of social behavior and communal life of human beings living in any environment is called________? |
| A. | Environmental biology |
| B. | Social biology |
| C. | Human biology |
| D. | Both b and c |
| Answer» C. Human biology | |
| 272. |
Un-separated replica of chromosome is called___________? |
| A. | Chromatin |
| B. | Kinetochore |
| C. | Chromatid |
| D. | Centromere |
| Answer» D. Centromere | |
| 273. |
A-biogenesis means that_____________? |
| A. | Living things originated from bacteria |
| B. | Mycobionts |
| C. | Non-living things |
| D. | None of these |
| Answer» D. None of these | |
| 274. |
Different species of plants and animals living in the same habitat is called ___________? |
| A. | Population |
| B. | Community |
| C. | Biome |
| D. | Habitat |
| Answer» C. Biome | |
| 275. |
The innate tendency of offspring to resemble their parents is called________? |
| A. | heridity |
| B. | heridisk |
| C. | varaition |
| D. | none |
| Answer» B. heridisk | |
| 276. |
___________ is the potential surce of chemical energy for cellular activities? |
| A. | C-H bond |
| B. | C-O bond |
| C. | C-N bond |
| D. | P-O-C bond |
| Answer» B. C-O bond | |
| 277. |
PCR stand for _________? |
| A. | Polymerase chain reaction |
| B. | Poly carbomyl reaction |
| C. | Peptide chain reaction |
| D. | Pentapeptide chain reaction |
| Answer» B. Poly carbomyl reaction | |
| 278. |
The tumours which are of small size and localized are___________? |
| A. | benign |
| B. | malignant |
| C. | gentle |
| D. | nasty |
| Answer» B. malignant | |
| 279. |
Ribosomes were discovered by_______? |
| A. | Golgi |
| B. | De Duve |
| C. | Palade |
| D. | R.Brown |
| Answer» D. R.Brown | |
| 280. |
The study of nature is called__________? |
| A. | Science |
| B. | Atom |
| C. | Molecule |
| D. | Element |
| Answer» B. Atom | |
| 281. |
The main types of plastids are___________? |
| A. | Chloroplasts |
| B. | Chromoplasts |
| C. | Leucoplasts |
| D. | All of these |
| Answer» E. | |
| 282. |
Fibers of the extracellular matrix is the characteristics of_______________? |
| A. | Plant cell wall |
| B. | Bacterial cell wall |
| C. | Cell membrane of bacteria |
| D. | Fluid mosaic model of cell membrane |
| Answer» E. | |
| 283. |
The process involved in inflammation of liver___________? |
| A. | apoptosis |
| B. | Necrosis |
| C. | Both a & b |
| D. | Non disjunction |
| Answer» C. Both a & b | |
| 284. |
_____________________ contains the green chemical called chlorophyll. |
| A. | Cytoplasm |
| B. | Cell membrane |
| C. | Chloroplasts |
| D. | Vacuole |
| Answer» D. Vacuole | |
| 285. |
The one which is present in all living things |
| A. | Cell nucleus |
| B. | DNA or RNA |
| C. | Cell membrane |
| D. | Vacuole |
| Answer» C. Cell membrane | |
| 286. |
Animals that eat plants are called___________________? |
| A. | Herbivores |
| B. | Consumer |
| C. | Carnivores |
| D. | Omnivores |
| Answer» B. Consumer | |
| 287. |
_____________ is a scientific word for human beings? |
| A. | Animals |
| B. | Homo sepions |
| C. | Omnivore |
| D. | Consumer |
| Answer» C. Omnivore | |
| 288. |
Exact replica of chromosome refers to ___________? |
| A. | Chromatid |
| B. | Centromere |
| C. | Kinetochore |
| D. | Arms |
| Answer» B. Centromere | |
| 289. |
enzyme is_____________? |
| A. | bio catalyst |
| B. | hormone |
| C. | Gland |
| D. | None of these |
| Answer» B. hormone | |
| 290. |
Lactometer is used for__________? |
| A. | Ship |
| B. | Milk |
| C. | Honey |
| D. | None |
| Answer» C. Honey | |
| 291. |
Density gradient centrifugation separates the materials on the basis of__________? |
| A. | Size alone |
| B. | Density alone |
| C. | Both a & b |
| D. | Velocity of movement |
| Answer» D. Velocity of movement | |
| 292. |
What is the mode of transmission of Hepatitis virus? |
| A. | Aerosol |
| B. | Parentral (via blood) |
| C. | Skin penetration |
| D. | Unknown |
| Answer» C. Skin penetration | |
| 293. |
Different species of plants and animals living in the same habitat is called? |
| A. | Population |
| B. | Community |
| C. | Biome |
| D. | Habitat |
| Answer» C. Biome | |
| 294. |
Which one is not correct for a productive theory? |
| A. | It is predictive |
| B. | It has explanatory power |
| C. | It discourages suggestion of different hypotheses |
| D. | None of these |
| Answer» D. None of these | |
| 295. |
Normally, in the process of osmosis, the net flow of water molecules into or out of the cell depends upon differences in the ? |
| A. | Concentration of water molecules inside and outside the cell |
| B. | Concentration of enzymes on either side of the cell membrane |
| C. | Rate of molecular motion on either side of the cell membrane |
| D. | None of these |
| Answer» B. Concentration of enzymes on either side of the cell membrane | |
| 296. |
The evaporative cooling in the respiratory tract of dogs is called? |
| A. | Vasodilation |
| B. | Vasoconstriction |
| C. | Panting |
| D. | All of these |
| Answer» D. All of these | |
| 297. |
Breeders have developed new and better varieties of food items by using which technique? |
| A. | Pasteurization |
| B. | Hydroponic culture technique |
| C. | Genetic engineering |
| D. | Biological control techniques |
| Answer» D. Biological control techniques | |
| 298. |
The concept that various organisms dominated this planet during various geological time period and thus placing organisms in a time squence came from the studies by ? |
| A. | Environmental biologist |
| B. | Paleontologist |
| C. | Marine biologist |
| D. | Social biologist |
| Answer» C. Marine biologist | |
| 299. |
Sodium ions are “pumped” from a region of lower concentration to a region of higher concentration in the nerve cells of humans. This process is an example of |
| A. | Diffusion |
| B. | Passive transport |
| C. | Osmosis |
| D. | Active transport |
| Answer» E. | |
| 300. |
It is possible to date the rocks by comparing the amount of specific radioactive isotopes they contain. Which of the statement is correct in this respect? |
| A. | Older sediment layers have equal amount of these radioactive isotopes as that of the young ones |
| B. | Older sediment layers have less amount of these radioactive isotopes as that of the young ones. |
| C. | Older sediment layers have greater amount of these radioactive isotopes as that of the young ones. |
| D. | Older sediment layers did not have these radioactive isotopes |
| Answer» C. Older sediment layers have greater amount of these radioactive isotopes as that of the young ones. | |