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.
| 1001. |
Reflex actions below the neck are under control of____________? |
| A. | Brain |
| B. | Spinal cord |
| C. | Hypothalamus |
| D. | none of these |
| Answer» C. Hypothalamus | |
| 1002. |
Which of the following is present inside the vertebral column______________? |
| A. | Brain |
| B. | Spinal cord |
| C. | Both of these |
| D. | none of these |
| Answer» C. Both of these | |
| 1003. |
Which of the following is largest part of brain? |
| A. | Cerebrum |
| B. | Cerebellum |
| C. | Medulla oblongata |
| D. | Thalamus |
| Answer» B. Cerebellum | |
| 1004. |
Which of the following acts as thermoregulator? |
| A. | Cerebrum |
| B. | Cerebellum |
| C. | Thalamus |
| D. | Hypothalamus |
| Answer» E. | |
| 1005. |
Intelligence is under the control of____________? |
| A. | Cerebrum |
| B. | Cerebellum |
| C. | Thalamus |
| D. | Hypothalamus |
| Answer» B. Cerebellum | |
| 1006. |
Value of resting membrane potential is_____________? |
| A. | 0.03 V |
| B. | 0.05 V |
| C. | 0.07 V |
| D. | 0.09V |
| Answer» D. 0.09V | |
| 1007. |
Which of the following allows precise muscular movements_______________? |
| A. | Cerebrum |
| B. | Cerebellum |
| C. | Thalamus |
| D. | Hypothalamus |
| Answer» C. Thalamus | |
| 1008. |
Which of the following feature is not related to neuron? |
| A. | Conduction |
| B. | Regeneration |
| C. | Reflex |
| D. | Movement |
| Answer» C. Reflex | |
| 1009. |
It is one of the convulsive disorders of nerves which are characterized by abrupt transient symptoms of motor, sensory, psychic or autonomic nature________________? |
| A. | Parkinson’s disease |
| B. | Epilepsy |
| C. | Alzheimer’s discease |
| D. | Dementia |
| Answer» C. Alzheimer’s discease | |
| 1010. |
Receptors for hearing come under heading of___________? |
| A. | Chemical |
| B. | Mechanical |
| C. | Photo |
| D. | Nociceptors |
| Answer» C. Photo | |
| 1011. |
Which of the following is a chemical link between catabolism and anabolism? |
| A. | AMP |
| B. | ADP |
| C. | ATP |
| D. | All of these |
| Answer» D. All of these | |
| 1012. |
Photosynthesis is process in which ________ compounds of carbon (CO2) and hydrogen (H2O) are reduced to carbohydrate like (glucose) using light energy. |
| A. | Organic |
| B. | Energy rich |
| C. | Energy poor |
| D. | Reduced |
| Answer» D. Reduced | |
| 1013. |
Which of the following is a compensation point: |
| A. | Leaves respire and utilize O2 and release CO2. |
| B. | Photosynthesis and respiration occur at same rate. So there is not net exchange of gases between atmosphere and plants. |
| C. | Rate of photosynthesis increases, so do the O2 production, with a net release of oxygen coupled with the uptake of CO2. |
| D. | Rate of respiration becomes more than rate of photosynthesis. |
| Answer» C. Rate of photosynthesis increases, so do the O2 production, with a net release of oxygen coupled with the uptake of CO2. | |
| 1014. |
Quantitative study of energy relationships in biological systems obeys. |
| A. | Bioenergetics |
| B. | Laws of thermodynamics |
| C. | Laws of thermo chemistry |
| D. | Laws of chemical energetic |
| Answer» C. Laws of thermo chemistry | |
| 1015. |
The percentage of light absorbed by the leaf is ___________? |
| A. | 20% |
| B. | 15% |
| C. | 10% |
| D. | 1% |
| Answer» E. | |
| 1016. |
The organisms able to use sunlight directly as a source of energy are_____________? |
| A. | Plants |
| B. | Animals |
| C. | Omnivores |
| D. | Fungi |
| Answer» B. Animals | |
| 1017. |
Carotenoids perform protective function in_____________? |
| A. | Animals |
| B. | Plants |
| C. | Both of these |
| D. | None of these |
| Answer» D. None of these | |
| 1018. |
Of the following which one is not an energy releasing process? |
| A. | Glycolysis |
| B. | Respiration |
| C. | Photosynthesis |
| D. | Kreb’s cycle |
| Answer» D. Kreb’s cycle | |
| 1019. |
About __________ % of photosynthesis is carried by terrestrial plants, while rest occurs in ocean, lakes, and ponds? |
| A. | 10% |
| B. | 20% |
| C. | 30% |
| D. | 40% |
| Answer» B. 20% | |
| 1020. |
Visible light used in photosynthesis ranges from:__________? |
| A. | 300 – 700 nm in wavelength |
| B. | 350 – 750 nm in wavelength |
| C. | 380 – 750 nm in wavelength |
| D. | 390 – 790 nm in wavelength. |
| Answer» D. 390 – 790 nm in wavelength. | |
| 1021. |
The first action spectrum was obtained by___________? |
| A. | T.W.Englemam |
| B. | Malleus |
| C. | T.W.Inws |
| D. | W.Stapes |
| Answer» B. Malleus | |
| 1022. |
Which of the light is mainly absorbed by the plants? |
| A. | Orange |
| B. | Red |
| C. | Green |
| D. | Both A and B |
| Answer» E. | |
| 1023. |
Which of the following light is least absorbed by the plants? |
| A. | Orange |
| B. | Red |
| C. | Blue |
| D. | Green |
| Answer» E. | |
| 1024. |
Molecular formula of chlorophyll ‘a’ molecule is___________? |
| A. | C55H72O5N4Mg |
| B. | C55H70O6N4Mg |
| C. | C50H72O6N4Mg |
| D. | C55H70O5N4Mg |
| Answer» B. C55H70O6N4Mg | |
| 1025. |
Light reaction takes place on/in____________? |
| A. | Thylakoid |
| B. | Storma |
| C. | Chloroplast |
| D. | Grana |
| Answer» E. | |
| 1026. |
Stomata cover only ______________ of leaf surface? |
| A. | 0.03 – 0.04% |
| B. | 10% |
| C. | 1-2 % |
| D. | 50% |
| Answer» D. 50% | |
| 1027. |
Reduction in photosynthesis is of____________? |
| A. | O2 |
| B. | CO2 |
| C. | H2O |
| D. | light energy |
| Answer» C. H2O | |
| 1028. |
Of the following, which one light – gathering? |
| A. | Antenna complex |
| B. | Reaction centre |
| C. | Photosystem |
| D. | None of these |
| Answer» B. Reaction centre | |
| 1029. |
NADPH2 provides___________? |
| A. | assimilatory power |
| B. | chemical energy |
| C. | energized electrons |
| D. | All of these |
| Answer» E. | |
| 1030. |
Of the following, which one is better respiratory medium___________? |
| A. | Air |
| B. | Water |
| C. | Soil |
| D. | None of these |
| Answer» B. Water | |
| 1031. |
Thylakoids in chloroplasts are stacked into___________? |
| A. | Grana |
| B. | Stroma |
| C. | Nucleus |
| D. | None of these |
| Answer» B. Stroma | |
| 1032. |
Photosystem II has molecules which absorbs maximum light of___________? |
| A. | 680 nm |
| B. | 100 m |
| C. | 700 nm |
| D. | 670 nm |
| Answer» B. 100 m | |
| 1033. |
In all plants the major sites of phosynthesis are___________? |
| A. | Leaves respire and utilize O2 and release CO2 |
| B. | Stems |
| C. | Roots |
| D. | Branches |
| Answer» B. Stems | |
| 1034. |
Chlorophylls are found embedded in the __________ membranes? |
| A. | Stroma |
| B. | Grana |
| C. | Thylakoid |
| D. | Intergrana |
| Answer» D. Intergrana | |
| 1035. |
The dense fluid filled region in the chloroplast is____________? |
| A. | Grana |
| B. | Stroma |
| C. | Thylakoid |
| D. | None of these |
| Answer» C. Thylakoid | |
| 1036. |
Glycolysis takes place in____________? |
| A. | Nucleus |
| B. | Cytosol |
| C. | Mitochondria |
| D. | Ribosomes |
| Answer» D. Ribosomes | |
| 1037. |
Complete breakdown of glucose molecule takes place in which of the following? |
| A. | Alcoholic fermentation |
| B. | Lactic acid fermentation |
| C. | Aerobic respiration |
| D. | All of these |
| Answer» D. All of these | |
| 1038. |
Photosynthesis carried out by terrestrial plants is _________ of total photosynthesis? |
| A. | 1-2% |
| B. | 5% |
| C. | 10% |
| D. | 20% |
| Answer» D. 20% | |
| 1039. |
Xanthophylls are _________ pigments |
| A. | Yellow |
| B. | Red |
| C. | Orange |
| D. | Green |
| Answer» B. Red | |
| 1040. |
Final acceptor of electrons in respiratory chain is____________? |
| A. | NADH |
| B. | Cytochrome a3 |
| C. | Water |
| D. | Oxygen |
| Answer» E. | |
| 1041. |
In which of the following component of the body, lactic acid fermentation takes place? |
| A. | Brain |
| B. | Heart |
| C. | Liver |
| D. | Muscles |
| Answer» E. | |
| 1042. |
The most important photosynthetic pigment is ___________? |
| A. | Chlorophyll a |
| B. | Chlorophyll b |
| C. | Xanthophyll |
| D. | Carotenes |
| Answer» B. Chlorophyll b | |
| 1043. |
From one pyruvate passing through Kreb’s cycle, how many NADH are formed? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» D. 4 | |
| 1044. |
Cellular respiration is essentially a/an _____________ process? |
| A. | Oxidation |
| B. | Reduction |
| C. | Redox |
| D. | None of the above |
| Answer» B. Reduction | |
| 1045. |
In Anaerobic respiration only __________ % of the energy present within the chemical bond of glucose is converted into ATP? |
| A. | 1% |
| B. | 2% |
| C. | 3% |
| D. | 4% |
| Answer» C. 3% | |
| 1046. |
___________ respiration is the process by which cell utilized oxygen and produces CO2 ? |
| A. | Cellular |
| B. | Organismic |
| C. | Both of these |
| D. | None of these |
| Answer» B. Organismic | |
| 1047. |
During rest the breathing occurs rhythmically at the frequency of _________ times per minute in human? |
| A. | 16-30 |
| B. | 15-20 |
| C. | 5?10 |
| D. | 6?12 |
| Answer» C. 5?10 | |
| 1048. |
The maximum amount of oxygen which normal human blood absorbs and carries at sea level is ________ per 100 ml of blood. |
| A. | 10 ml |
| B. | 20 ml |
| C. | 30 ml |
| D. | 40 ml |
| Answer» C. 30 ml | |
| 1049. |
Among the followings which is the most longest supportive cell? |
| A. | Tracheids |
| B. | Sclereids |
| C. | Trachea |
| D. | Collenchyma cells |
| Answer» B. Sclereids | |
| 1050. |
The glycolate produced diffuses into the membrane bounded organelles called____________? |
| A. | Glyoxisomes |
| B. | Peroxisomes |
| C. | Lysosomes |
| D. | Mitochondria |
| Answer» C. Lysosomes | |