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.
| 601. |
Animals with greatest number of similarities are grouped together in a/an___________? |
| A. | Phylum |
| B. | Family |
| C. | Genus |
| D. | Order |
| Answer» D. Order | |
| 602. |
The name Bacteriophage was coined by____________? |
| A. | Charles Chamberland |
| B. | Ivanowski |
| C. | Twort |
| D. | D Herelle |
| Answer» E. | |
| 603. |
Amoeba belongs to which kingdom______________? |
| A. | Prokaryotae |
| B. | Plantae |
| C. | Monera |
| D. | Protista |
| Answer» E. | |
| 604. |
In lysogenic cycle the process of spearation of phage DNA from the hosts chromosome and initiation of lytic cycle is called______________? |
| A. | Lysis |
| B. | Lysogeny |
| C. | Induction |
| D. | Adsorption |
| Answer» D. Adsorption | |
| 605. |
Nodules on roots of leguminous plants have __________ bacteria? |
| A. | Anaerobic |
| B. | Nitrogen fixing |
| C. | Nitrifying |
| D. | Ammonifying |
| Answer» C. Nitrifying | |
| 606. |
Which of the Euglenas (a Protoctista) character resembles that of animals______________? |
| A. | They can move |
| B. | They lack cell wall |
| C. | They do not have chlorophyll |
| D. | Both a and b |
| Answer» E. | |
| 607. |
Scurvy and beri – beri and caused by the deficiency of___________? |
| A. | Vitamin B and C |
| B. | Vitamin B and D |
| C. | Vitamin C and B |
| D. | Vitamin A and B |
| Answer» D. Vitamin A and B | |
| 608. |
Organisms of which of the following kingdom have absorptive mode of nutrition______________? |
| A. | Prokaryotae |
| B. | Protoctista |
| C. | Animalia |
| D. | Fungi |
| Answer» E. | |
| 609. |
Triglyceride is also known as_____________? |
| A. | Natural lipid |
| B. | Neutral lipid |
| C. | Neutral wax |
| D. | All of these |
| Answer» C. Neutral wax | |
| 610. |
The one which can break open a plasmid ring is__________? |
| A. | Ligase enzyme |
| B. | Primase enzyme |
| C. | Restriction endonuclease |
| D. | ATP-ase enzyme |
| Answer» B. Primase enzyme | |
| 611. |
Which of the following category is most general with its members lest resembling with each other than the other categries_____________? |
| A. | Species |
| B. | Genus |
| C. | Family |
| D. | Order |
| Answer» E. | |
| 612. |
Allium cepa is the scientific name of______________? |
| A. | Onion |
| B. | Amaltas |
| C. | Potato |
| D. | Tomato |
| Answer» B. Amaltas | |
| 613. |
According to Lamarch evolution occurred as the result of__________? |
| A. | Natural selection |
| B. | The theory of recapitulation |
| C. | Inheritance of acquired characters |
| D. | Over production |
| Answer» D. Over production | |
| 614. |
The sequence of 3 bases on tRNA which is complementary to condon of mRNA is called____________? |
| A. | Gene |
| B. | Anticodon |
| C. | Code |
| D. | Codon |
| Answer» C. Code | |
| 615. |
Which of the following relationship is NOT an example of symbiosis? |
| A. | Rhizobium and leguminous plants |
| B. | Marchantia sporophyte and gametophyte |
| C. | Algae and fungi in a lichen |
| D. | Mycorrhizal fungi and tree roots |
| Answer» C. Algae and fungi in a lichen | |
| 616. |
Carbon commonly combines with______________? |
| A. | H |
| B. | N & O |
| C. | P & S |
| D. | All of these |
| Answer» E. | |
| 617. |
Most of the cellular secretions are ________ in nature? |
| A. | Glycolipids |
| B. | Glycoproteins |
| C. | Nucleohistones |
| D. | Proteins |
| Answer» C. Nucleohistones | |
| 618. |
The first eukarotes appeared about __________ years ago? |
| A. | 1.5 billion |
| B. | 2.5 billion |
| C. | 3.5 billion |
| D. | 4.5 billion |
| Answer» B. 2.5 billion | |
| 619. |
The red green color blindness is sex linked recessive condition in man. A father with normal vision and a color blind mother world expect to produce. |
| A. | Color blind sons and daughter with normal vision |
| B. | Sons with normal vision and color blind daughters |
| C. | Color blind sons colour blind daughters and daughters with normal vision |
| D. | Sons with normal vision colour blind daughter and daughters with normal vision |
| Answer» B. Sons with normal vision and color blind daughters | |
| 620. |
Which one gives blue colour with iodine_______________? |
| A. | Starch |
| B. | Glycogen |
| C. | Cellulose |
| D. | Polysaccharide |
| Answer» B. Glycogen | |
| 621. |
In humans the number of tetrads formed during mitosis is___________? |
| A. | 23 |
| B. | 46 |
| C. | 0 |
| D. | 4 |
| Answer» D. 4 | |
| 622. |
The one that stores calcium is __________? |
| A. | Sarcolemma |
| B. | Sarcoplasm |
| C. | Sarcoplasmic reticulum |
| D. | Cytosol |
| Answer» D. Cytosol | |
| 623. |
The survival of an animal depends upon its ability to take some from its environment____________? |
| A. | Chemicals |
| B. | Hydrocarbons |
| C. | Organic molecules |
| D. | Inorganic molecules |
| Answer» D. Inorganic molecules | |
| 624. |
Exposure to low temperature stimulates plants to flower. This is called___________? |
| A. | Photoperiodism |
| B. | Thermotropism |
| C. | Vernalisation |
| D. | Thermoregulation |
| Answer» D. Thermoregulation | |
| 625. |
In Cx(H2O)y x ranges from______________? |
| A. | 1 to 3 thousand |
| B. | 3 to many thousand |
| C. | 3 to 5 thousand |
| D. | 5 to 9 thousand |
| Answer» C. 3 to 5 thousand | |
| 626. |
Which one is not found in fatty acids in acylglycerols____________? |
| A. | C-6 |
| B. | C-25 |
| C. | C-26 |
| D. | C-30 |
| Answer» C. C-26 | |
| 627. |
The basic structural unit of a chromosome is____________? |
| A. | The centromere |
| B. | Nuceleosome |
| C. | Telomere |
| D. | Histone |
| Answer» C. Telomere | |
| 628. |
In an aqueous environment the most stable tertiary conformation is that in which _________ amino acids are buried inside the conformation? |
| A. | Hydrophobic |
| B. | Hydrophilic |
| C. | Basic |
| D. | None of these |
| Answer» B. Hydrophilic | |
| 629. |
Sebum produced from sebaceous glands in a mammal helps in___________? |
| A. | Protection against micro organisms |
| B. | Temperature regulation |
| C. | Excretion |
| D. | All of these |
| Answer» B. Temperature regulation | |
| 630. |
Which of the following statement is incorrect about RNA_________________? |
| A. | The pentose sugar in it is Ribose. |
| B. | It contains Adenine Guanine Thymine and Cytosine |
| C. | It is present in the nucleoli |
| D. | It may be folded back on itself to give double helical characteristics. |
| Answer» C. It is present in the nucleoli | |
| 631. |
Which one of the following is most likely to occur in an animal during winter? |
| A. | Activation of sweat glands |
| B. | Dilation of skin blood vessels |
| C. | Panting |
| D. | Thermogenesis |
| Answer» E. | |
| 632. |
How many carbon atoms are required to form a furan ring (ribofuranose)_____________? |
| A. | 3 |
| B. | 4 |
| C. | 5 |
| D. | 2 |
| Answer» C. 5 | |
| 633. |
In esterification OH comes from_______________? |
| A. | Organic acid |
| B. | Alcohol |
| C. | Water |
| D. | Sugar |
| Answer» C. Water | |
| 634. |
rRNA constitutes ____________% of the total cellular RNA? |
| A. | 3-4 % |
| B. | 10-20% |
| C. | 80% |
| D. | 90% |
| Answer» D. 90% | |
| 635. |
Which of the following are triploblastic and acoelomate? |
| A. | Sponges |
| B. | Annelida |
| C. | Platyhelminthes |
| D. | Aves |
| Answer» D. Aves | |
| 636. |
Which of the following occurs in anaerobic respiration but not in aerobic respiration? |
| A. | Release of CO2 |
| B. | Reduction of NAD |
| C. | Formation of ATP |
| D. | Production of ethanol from acetaldehyde |
| Answer» E. | |
| 637. |
Sleep movements are a type of___________? |
| A. | Turgor movements |
| B. | Growth movements |
| C. | Tactic movements |
| D. | Paratonic movments |
| Answer» B. Growth movements | |
| 638. |
Protein coasts of viruses are synthesized in____________? |
| A. | Lytic cycle |
| B. | Lysogenic cycle |
| C. | Both a & b |
| D. | All of these |
| Answer» B. Lysogenic cycle | |
| 639. |
helical structure is kept by the formation of _________ bonds among amino acids molecules? |
| A. | H bonds |
| B. | Disulphide Bond |
| C. | Ionic bond |
| D. | Hydrophobic bonds |
| Answer» B. Disulphide Bond | |
| 640. |
The food of hydra consists of___________? |
| A. | Humus |
| B. | Detritus |
| C. | Dead microscopic animals |
| D. | Small crustaceans |
| Answer» E. | |
| 641. |
An insulin molecule consists of _________ polypeptide chains? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 642. |
The trioses which are intermediate in respiration and photosynthesis are_______________? |
| A. | Glyceraldehydes |
| B. | Dihydroxy acetone |
| C. | Both of these |
| D. | None of these |
| Answer» D. None of these | |
| 643. |
Chemical component/s less in eukaryotic cell as compared to prokaryotic cell is / are (i) lipids (ii) carbodydrates (iii) proteins (iv) DNA_________________? |
| A. | i & ii |
| B. | iii & iv |
| C. | i ii iii & iv |
| D. | iv only |
| Answer» E. | |
| 644. |
Each turn of DNA contain ____________ nitrogenous base pairs? |
| A. | 5 |
| B. | 10 |
| C. | 20 |
| D. | 25 |
| Answer» C. 20 | |
| 645. |
Total number of amino acids discovered so far in cells and tissues are______________? |
| A. | 20 |
| B. | 25 |
| C. | 150 |
| D. | 170 |
| Answer» E. | |
| 646. |
Membranes of the grane are sites where? |
| A. | Oxygen is stored |
| B. | Food is stored |
| C. | Sunlight is trapped |
| D. | CO2 is stored. |
| Answer» D. CO2 is stored. | |
| 647. |
Antibodies play important role against microorganisms and other pathogens to which type of proteins do they belong________? |
| A. | Globular proteins |
| B. | Fibrous Proteins |
| C. | Both a and b |
| D. | None of these |
| Answer» B. Fibrous Proteins | |
| 648. |
The major constituent of blood plasma is___________? |
| A. | Protein |
| B. | NaCl |
| C. | Water |
| D. | Cholesterol |
| Answer» D. Cholesterol | |
| 649. |
Which of the following polysaccharide is called animal starch_________________? |
| A. | Starch |
| B. | Glycogen |
| C. | Cellulose |
| D. | None of these |
| Answer» C. Cellulose | |
| 650. |
The windpipe or trachea lies? |
| A. | Dorsal to oesophagus |
| B. | Ventral to oesophagus |
| C. | Lateral to oesophagus |
| D. | None of these |
| Answer» E. | |