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.
| 951. |
Monocots are characterized by___________? |
| A. | Number of sepals and petals are 2 or multiple of 2 |
| B. | Number of sepals and petals are 3 or multiple of 3 |
| C. | Number of sepals and petals are 4 or multiple of 4 |
| D. | Number of sepals and petals are 5 or multiple of 5 |
| Answer» C. Number of sepals and petals are 4 or multiple of 4 | |
| 952. |
The first cell of the sporophyte generation is______________? |
| A. | Oospore |
| B. | Spore mother cell |
| C. | Spore |
| D. | Gamete |
| Answer» B. Spore mother cell | |
| 953. |
Maize is an example of_________________? |
| A. | Monocot |
| B. | Dicot |
| C. | Gymnosperms |
| D. | none of these |
| Answer» B. Dicot | |
| 954. |
Due to which property of Adiantum and example of Filicinae is called Maidenhairfern________________? |
| A. | Its short thick branched horizontally growing rhizome |
| B. | Fibrous adventituous roots arise from the lower side of rhizome |
| C. | Shows heteromorphic alternation of generation |
| D. | Stipe (stalk) and rachis of leaf have black smooth and shiny hair like structures |
| Answer» E. | |
| 955. |
Stem of Psilophyton an example of psilogsida is differentiated into an underground rhizome and an aerial part both of which are _________ branched |
| A. | Isotomous |
| B. | Dichotomously |
| C. | Trichotomously |
| D. | Multichotomously |
| Answer» C. Trichotomously | |
| 956. |
Specialized protective coverings around megasporangium which vary in number are called_________________? |
| A. | Sporangium |
| B. | Integuments |
| C. | Ovule |
| D. | Pericarp |
| Answer» C. Ovule | |
| 957. |
Pinus Taxus and Picea belong to_________________? |
| A. | Spheospsida |
| B. | Filicineae |
| C. | Gymnosperms |
| D. | Angiosperms |
| Answer» D. Angiosperms | |
| 958. |
Of the following four options which one is most advanced? |
| A. | Anthoceropsida |
| B. | Bryopsida |
| C. | Hepaticopsida |
| D. | None of these |
| Answer» B. Bryopsida | |
| 959. |
Ground pries are also known as___________? |
| A. | Lycopods |
| B. | Spike mosses |
| C. | Both of these |
| D. | None of these |
| Answer» D. None of these | |
| 960. |
The zygote formed in liverworts is___________? |
| A. | Unicellular |
| B. | Mulicellular |
| C. | Multinucleate |
| D. | None of these |
| Answer» B. Mulicellular | |
| 961. |
Type of sensations carried by nociceptors are_________________? |
| A. | Touch |
| B. | Temperature |
| C. | Pressure |
| D. | Pain |
| Answer» E. | |
| 962. |
The arrangement of unequal dichotomous branches in one plane during evolution of leaves is called_____________? |
| A. | Overtopping |
| B. | Fusion |
| C. | Webbing |
| D. | Planation |
| Answer» E. | |
| 963. |
Sporophyte is____________? |
| A. | Monoploid |
| B. | Haploid |
| C. | Diploid |
| D. | Polyploidy |
| Answer» D. Polyploidy | |
| 964. |
Central nervous system of man consists of______________? |
| A. | Brain |
| B. | Spinal cord |
| C. | Both of these |
| D. | none of these |
| Answer» D. none of these | |
| 965. |
Which of the following plant group first formed true leaves________________? |
| A. | Psilopsida |
| B. | Lycopsida |
| C. | Sphenopsida |
| D. | Pteropsida |
| Answer» C. Sphenopsida | |
| 966. |
Megaphylls i.e. leaves with divided veins with an expanded lamina is a dharacteristic of ___________________? |
| A. | Lycopods |
| B. | Ferns |
| C. | Seed plants |
| D. | Both b and c |
| Answer» E. | |
| 967. |
Mosses are included in sub-division of ___________? |
| A. | Anthoceropsida |
| B. | Hepaticopsida |
| C. | Bryopsida |
| D. | Lycopsida |
| Answer» D. Lycopsida | |
| 968. |
Which of the following statement about filicinae a group of tracheophytes is incorrect_________________? |
| A. | They belong to sphenopsida |
| B. | They are seedless and their leaves are called fronds |
| C. | They live in shady and moist areas |
| D. | They show circinate vernation |
| Answer» B. They are seedless and their leaves are called fronds | |
| 969. |
The simplest of all bryophytes are___________? |
| A. | Thallophytes |
| B. | Embryophytes |
| C. | Mosses |
| D. | Liverworts |
| Answer» E. | |
| 970. |
In Hornworts the band of meristematic tissue is found near_____________? |
| A. | Foot |
| B. | Gamete producing region |
| C. | Spore producing region |
| D. | At junction of A & B |
| Answer» E. | |
| 971. |
Antheridiophore and archegoniophore are found in_____________? |
| A. | Marchantia |
| B. | Funaria |
| C. | Both of these |
| D. | None of these |
| Answer» D. None of these | |
| 972. |
Which of the following pigment is Blue- green in colour? |
| A. | Chlorophyll a |
| B. | Chlorophyll b. |
| C. | Chlorophyll c |
| D. | Chlorophyll d. |
| Answer» B. Chlorophyll b. | |
| 973. |
In life cycle of Pinus megaspores produced by megasporangium divide into 4 megaspores by__________________? |
| A. | Mitosis |
| B. | Meiosis |
| C. | Both depending upon the conditions |
| D. | None of these |
| Answer» C. Both depending upon the conditions | |
| 974. |
Which of the following group of tracheophyta has expanded or scale like leaves which are alwaysed arranges in whorls? |
| A. | Psilopsida |
| B. | Lycopsida |
| C. | Sphenopsida |
| D. | Prteropsida |
| Answer» D. Prteropsida | |
| 975. |
The chlorophyll molecule is embedded in the core of thylakoid membrane which acts as___________? |
| A. | Hydrophilic |
| B. | Hydrophobic |
| C. | Both of these |
| D. | None of these |
| Answer» C. Both of these | |
| 976. |
Which of the following tracheophytes are leafless? |
| A. | Psilopsida |
| B. | Lycopsida |
| C. | Sphenopsida |
| D. | Prteropsida |
| Answer» B. Lycopsida | |
| 977. |
Which of the following statements is incorrect about skeletal muscle fibers? |
| A. | They are multinucleated |
| B. | They are 10 – 100 ?m in diameter & surrounded by sarcolemma |
| C. | They contain O2 storing molecules called hemoglobin |
| D. | Their cytoplasm contains high concentration of carbohydrates |
| Answer» D. Their cytoplasm contains high concentration of carbohydrates | |
| 978. |
Sporangia of which of the following tracheopytes develop singly on the upper side of sporophylls which may or may not be arranged to form strobili_____________? |
| A. | Psilopsida |
| B. | Lycopsida |
| C. | Sphenopsida |
| D. | Prteropsida |
| Answer» C. Sphenopsida | |
| 979. |
Chemically auxins are____________? |
| A. | Indole propionic acid |
| B. | Indole carboxylic acid |
| C. | Indole acetaldehyde |
| D. | Indole acetic acid |
| Answer» E. | |
| 980. |
Chlorosis, i.e., yellowish hue on the leaves results from_____________? |
| A. | Accumulation of toxic waste products in leaves |
| B. | Deficiency of chlorophyll |
| C. | Short supplies of mineral nutrients in the soil |
| D. | All of these |
| Answer» E. | |
| 981. |
____________ is simplest form of learning. |
| A. | Imprinting |
| B. | Habituation |
| C. | Insight learning |
| D. | Latent learning |
| Answer» C. Insight learning | |
| 982. |
Which type of sensory structures carry deep pressure and vibration sensations______________? |
| A. | Hair end organs |
| B. | Meissner’s Corpuscles |
| C. | Pacinian corpuscles |
| D. | none of these |
| Answer» D. none of these | |
| 983. |
Which type of the receptors are present in the ear__________________? |
| A. | Chemoreceptors |
| B. | Mechanoreceptors |
| C. | Photoreceptors |
| D. | Thermoreceptors |
| Answer» C. Photoreceptors | |
| 984. |
Which type of sensory structures carrying the touch sensations are present in papillae extending into ridges of the fingertips___________________? |
| A. | Hair end organs |
| B. | Meissner’s Corpuscles |
| C. | Pacinian corpuscles |
| D. | None of these |
| Answer» C. Pacinian corpuscles | |
| 985. |
Type of neurons found exclusively in CNS are_____________? |
| A. | Sensory neurons |
| B. | Motor neurons |
| C. | Associative neurons |
| D. | None of these |
| Answer» D. None of these | |
| 986. |
Maintenance of normal resting potential via movement of K+ inside the cell and na+ out is a/an ___________ process? |
| A. | Active |
| B. | Passive |
| C. | Diffusional |
| D. | None of these |
| Answer» B. Passive | |
| 987. |
Secretin is a hormone produced by___________? |
| A. | Stomach |
| B. | Liver |
| C. | Pancreas |
| D. | Duodenum |
| Answer» E. | |
| 988. |
Cell membrane under resting conditions is impermeable to all the ions except_____________? |
| A. | Na+ |
| B. | K+ |
| C. | Cl- |
| D. | PO4-2 |
| Answer» C. Cl- | |
| 989. |
Insufficient secretion of iodothyroxine in adults causes____________? |
| A. | Myxedema |
| B. | Cretinism |
| C. | Goiter |
| D. | Exopthalmic goiter |
| Answer» B. Cretinism | |
| 990. |
Normal action potential of a neuronal cell is ___________? |
| A. | plus 50 mv |
| B. | plus 60 mv |
| C. | plus 70 mv |
| D. | plus 80 mv |
| Answer» B. plus 60 mv | |
| 991. |
Grave’s disease is produced due to____________? |
| A. | Undersecretion of thyroxin |
| B. | Overproduction of thyroxin |
| C. | Undersecretion of corticosteroids |
| D. | Overproduction of corticosteroids |
| Answer» C. Undersecretion of corticosteroids | |
| 992. |
Number of pairs of cranial nerves is__________? |
| A. | 10 |
| B. | 11 |
| C. | 12 |
| D. | 13 |
| Answer» D. 13 | |
| 993. |
Which of the followings is missing from the nervous system of planaria_____________? |
| A. | Ganglia |
| B. | Longitudinal nerves |
| C. | Lateral nerves |
| D. | none of these |
| Answer» E. | |
| 994. |
Which of the following has no central nervous system? |
| A. | Hydra |
| B. | Man |
| C. | Planaria |
| D. | Cockroach |
| Answer» B. Man | |
| 995. |
Na+ -K+ ATPase pump is important for_______________? |
| A. | Maintenance of resting potential |
| B. | Massive out flux of K+ after depolarization |
| C. | Recovery of resting potential |
| D. | Conversion of resting potential into action potential |
| Answer» D. Conversion of resting potential into action potential | |
| 996. |
In which of the following neurons length of dendrite is greater than axon_______________? |
| A. | Sensory neuron |
| B. | Motor neuron |
| C. | Associative neuron |
| D. | none of these |
| Answer» B. Motor neuron | |
| 997. |
Co-ordination in man is brought about by___________? |
| A. | Nervous system |
| B. | Endocrine system |
| C. | Both of these |
| D. | none of these |
| Answer» D. none of these | |
| 998. |
Higher turgor pressure in a plant cell is maintained by________________? |
| A. | Large number of vacoules in a plant cell |
| B. | Higher ionic concentration inside vacuoles resulting from active pumping of ions at their tonoplastic membrane |
| C. | Higher osmotic pressure of the cell vacuole |
| D. | both b and c |
| Answer» E. | |
| 999. |
Which of the following transmits nerve impulse from receptors to central nervous system? |
| A. | Sensory neuron |
| B. | Motor neuron |
| C. | Associative neuron |
| D. | none of these |
| Answer» B. Motor neuron | |
| 1000. |
Which of the following is second largest part of the brain_______________? |
| A. | Cerebrum |
| B. | Cerebellum |
| C. | Thalamus |
| D. | Hypothalamus |
| Answer» C. Thalamus | |