MCQOPTIONS
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MCQOPTIONS
This section includes 1528 Mcqs, each offering curated multiple-choice questions to sharpen your Grade9 knowledge and support exam preparation. Choose a topic below to get started.
| 451. |
The photosynthetic pigments are organized in clusters are known as |
| A. | solvent systems |
| B. | synthetic systems |
| C. | photo systems |
| D. | electro systems |
| Answer» D. electro systems | |
| 452. |
The deficiency or absence of any environmental factors that can decrease the rate or speed of metabolic reaction is called |
| A. | limiting factor |
| B. | defeating factor |
| C. | winning factor |
| D. | metabolic factor |
| Answer» B. defeating factor | |
| 453. |
The study of the relationship between energy and transformation of energy in living organisms is known as |
| A. | catabolize energetic |
| B. | anabolic energetic |
| C. | broken energetic |
| D. | bioenergetics |
| Answer» E. | |
| 454. |
The division of plant tissues based on structure and function includes |
| A. | meristematic tissue only |
| B. | permanent tissue only |
| C. | parenchymatous tissues |
| D. | meristematic and permanent tissues |
| Answer» E. | |
| 455. |
The animal either unicellular or multicellular, if they have distinct nucleus are called as |
| A. | prokaryotes |
| B. | eukaryotes |
| C. | protist |
| D. | protozoa |
| Answer» D. protozoa | |
| 456. |
The macromolecules are the ones that have |
| A. | high rate of respiration |
| B. | high molecular weights |
| C. | low molecular weights |
| D. | low rate of absorption |
| Answer» C. low molecular weights | |
| 457. |
The tissues that help in the contraction of stomach walls to grind food are classified as |
| A. | covalent tissues |
| B. | micro tissues |
| C. | macro tissues |
| D. | muscular tissues |
| Answer» E. | |
| 458. |
Organisms are |
| A. | eternal |
| B. | mortal |
| C. | unlimited life span |
| D. | immortal |
| Answer» C. unlimited life span | |
| 459. |
The process of yielding cellular energy is classified as |
| A. | anabolic reactions |
| B. | cellular respiration |
| C. | pigmented reactions |
| D. | carbolic reactions |
| Answer» C. pigmented reactions | |
| 460. |
The uses of fermentation include |
| A. | cheese and yogurt making |
| B. | brewing |
| C. | baking |
| D. | all of above |
| Answer» E. | |
| 461. |
During alcoholic fermentation, the pyruvic acid is broken down into |
| A. | monosaccharide |
| B. | alcohol |
| C. | glucose |
| D. | polysaccharides |
| Answer» C. glucose | |
| 462. |
The time of respiration is |
| A. | during day |
| B. | during night |
| C. | during afternoon |
| D. | whole day |
| Answer» E. | |
| 463. |
The O2 is reduced in cellular respiration into |
| A. | O2 |
| B. | H2O |
| C. | CO2 |
| D. | C2 |
| Answer» C. CO2 | |
| 464. |
The minimum energy required for starting reaction is called |
| A. | enzymatic energy |
| B. | catalysis energy |
| C. | solvent energy |
| D. | activation energy |
| Answer» E. | |
| 465. |
The usage of enzymes in breaking starch into the sugars in production of buns and white bread is considered as the usage of |
| A. | brewing industry |
| B. | paper industry |
| C. | food industry |
| D. | detergent industry |
| Answer» D. detergent industry | |
| 466. |
The conversion of substrates into different molecules in the presence of enzymes are called |
| A. | catalysts |
| B. | by products |
| C. | products |
| D. | covalent solutes |
| Answer» D. covalent solutes | |
| 467. |
The non-protein ions or molecules required by enzymes are called |
| A. | bifactors |
| B. | cofactors |
| C. | inhibitors |
| D. | deactivators |
| Answer» C. inhibitors | |
| 468. |
The major part of the metabolism which regulates metabolic pathways is classified as |
| A. | enzymes |
| B. | covalent bond |
| C. | solute |
| D. | solvent |
| Answer» B. covalent bond | |
| 469. |
The rays of light are absorbed by |
| A. | nucleated pigments |
| B. | catabolic pigments |
| C. | anabolic pigments |
| D. | photosynthetic pigments |
| Answer» E. | |
| 470. |
The increase in the level of carbon dioxide beyond a certain level leads to the |
| A. | decreased photosynthesis only |
| B. | closure of stomata only |
| C. | increased photosynthesis |
| D. | decreased photosynthesis and closure of stomata |
| Answer» E. | |
| 471. |
When FAD get two atoms of hydrogen, it becomes |
| A. | FADH2 |
| B. | NADH2 |
| C. | NADH |
| D. | ADH2 |
| Answer» B. NADH2 | |
| 472. |
The macromolecules that are synthesized includes |
| A. | Deoxyribonucleic Acid (DNA) |
| B. | Ribonucleic Acid (RNA) |
| C. | proteins |
| D. | all of above |
| Answer» E. | |
| 473. |
The water present in the soil is absorbed through osmosis by |
| A. | stems and leaves |
| B. | leaves and roots |
| C. | root hairs and roots |
| D. | xylem and shoots |
| Answer» D. xylem and shoots | |
| 474. |
The name of fiber supplement is |
| A. | Ispaghol husk |
| B. | cumin husk |
| C. | coriander husk |
| D. | mint husk |
| Answer» B. cumin husk | |
| 475. |
The wave of relaxation and contraction in muscles of walls of the alimentary canal is called |
| A. | pharynx amylase |
| B. | salivary amylase |
| C. | anti-peristalsis |
| D. | peristalsis |
| Answer» E. | |
| 476. |
The trace mineral which hardens tooth enamel and stabilizes the minerals of bones is |
| A. | sodium |
| B. | magnesium |
| C. | calcium |
| D. | fluoride |
| Answer» E. | |
| 477. |
The part of the large intestine from which water is absorbed into the blood is called |
| A. | gall bladder |
| B. | cardiac sphincter |
| C. | colon |
| D. | pyloric sphincter |
| Answer» D. pyloric sphincter | |
| 478. |
The glycerol and fatty acids are absorbed into lacteal of |
| A. | duodenum |
| B. | villus |
| C. | bile |
| D. | bolus |
| Answer» C. bile | |
| 479. |
The mass of the heart in a normal adult is about |
| A. | 250-350 g |
| B. | 350-400 g |
| C. | 400-450 g |
| D. | 200-250 g |
| Answer» B. 350-400 g | |
| 480. |
The pressure in sieve tubes of phloem is decreased due to the exit of |
| A. | nitrogen |
| B. | oxygen |
| C. | water |
| D. | carbon dioxide |
| Answer» D. carbon dioxide | |
| 481. |
If the blood group of a person is O then the antibodies present in that person's blood is |
| A. | anti-O and anti-A antibodies |
| B. | anti-O and anti-B antibodies |
| C. | anti-B and anti-A antibodies |
| D. | anti-B antibodies |
| Answer» D. anti-B antibodies | |
| 482. |
Considering the cardiac cycle, the sound "lub" is produced when the |
| A. | atria contracts |
| B. | atria relax |
| C. | ventricles relax |
| D. | ventricles contract |
| Answer» E. | |
| 483. |
The excess of glucose formed in mesophyll cells is converted into |
| A. | oxygen |
| B. | carbon dioxide |
| C. | amino acids |
| D. | sucrose |
| Answer» E. | |
| 484. |
The muscles that have involuntary action are |
| A. | smooth and skeletal muscles |
| B. | cardiac and smooth muscles |
| C. | skeletal and cardiac muscles |
| D. | squamous and ciliated muscles |
| Answer» C. skeletal and cardiac muscles | |
| 485. |
The example of a hyper solution is |
| A. | hydrochloric acid |
| B. | nitric acid |
| C. | freshwater |
| D. | seawater |
| Answer» E. | |
| 486. |
The fine-thread like the structure of chromosomes during interphase is classified as |
| A. | microtubules |
| B. | radii |
| C. | chromatin |
| D. | nuclei |
| Answer» D. nuclei | |
| 487. |
The cells that transmit the nerve impulses are |
| A. | nerve cells |
| B. | root hair cells |
| C. | red blood cells |
| D. | granum cells |
| Answer» B. root hair cells | |
| 488. |
The cells were first described by Robert Hooke is |
| A. | 1765 |
| B. | 1965 |
| C. | 1865 |
| D. | 1665 |
| Answer» E. | |
| 489. |
The relationship of biology to other sciences in which organisms are studied from economic point of view is classified as |
| A. | zoology |
| B. | biogeography |
| C. | bio economic |
| D. | botany |
| Answer» D. botany | |
| 490. |
The characteristics which are regarded as characteristics of life are all |
| A. | same |
| B. | different |
| C. | new |
| D. | complex |
| Answer» B. different | |
| 491. |
The study of inheritance is done in |
| A. | genetics |
| B. | physiology |
| C. | biotechnology |
| D. | parasitology |
| Answer» B. physiology | |
| 492. |
The branch of biology which deals with the study of social behavior of animals is classified as |
| A. | socio-biology |
| B. | microbiology |
| C. | embryology |
| D. | anatomy |
| Answer» B. microbiology | |
| 493. |
The basic types of cells includes |
| A. | prokaryotes only |
| B. | eukaryotes only |
| C. | protist |
| D. | prokaryotes and eukaryotes |
| Answer» E. | |
| 494. |
The sunlight absorbed by chlorophylls is converted into the |
| A. | synthetic energy |
| B. | potential energy |
| C. | kinetic energy |
| D. | chemical energy |
| Answer» E. | |
| 495. |
The Nobel Prize winner Fritz Lipmann who proposed ATP as major energy-transfer molecule in cells in |
| A. | 1949 |
| B. | 1935 |
| C. | 1941 |
| D. | 1929 |
| Answer» D. 1929 | |
| 496. |
The fuel used by cells in cellular respiration to get energy is |
| A. | polysaccharides |
| B. | polypeptides |
| C. | glucose |
| D. | sugar |
| Answer» D. sugar | |
| 497. |
The Nobel Prize winner biologist who proposed ATP as major energy-transfer molecule in cells is |
| A. | Fritz Lipmann |
| B. | Emil August |
| C. | Daniel Koshland |
| D. | Karl Lohmann |
| Answer» B. Emil August | |
| 498. |
The site of occurrence of glycolysis is |
| A. | smooth endoplasmic reticulum |
| B. | cytoplasm |
| C. | vacuoles |
| D. | rough endoplasmic reticulum |
| Answer» C. vacuoles | |
| 499. |
Epithelial, nervous, connective and muscular tissues are the major type of |
| A. | animal tissue |
| B. | plant tissue |
| C. | bacteria |
| D. | fungi |
| Answer» B. plant tissue | |
| 500. |
Insects are studied in |
| A. | entomology |
| B. | immunology |
| C. | paleontology |
| D. | taxonomy |
| Answer» B. immunology | |