MCQOPTIONS
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MCQOPTIONS
This section includes 1212 Mcqs, each offering curated multiple-choice questions to sharpen your Biology knowledge and support exam preparation. Choose a topic below to get started.
| 801. |
In Hardy-Weinberg formula P2 represents frequency of_____________? |
| A. | Recessive allele |
| B. | Dominant allele |
| C. | Homozygous dominant individual |
| D. | Homozygous recessive individual |
| Answer» D. Homozygous recessive individual | |
| 802. |
In golgi apparatus the maturing face is____________? |
| A. | Biconcave |
| B. | Convex |
| C. | Spherical |
| D. | Concave |
| Answer» E. | |
| 803. |
In Glycin an amino acid R group is replaced by____________? |
| A. | H |
| B. | CH3 |
| C. | COOH |
| D. | C = O |
| Answer» B. CH3 | |
| 804. |
In esterification OH comes from_______________? |
| A. | Organic acid |
| B. | Alcohol |
| C. | Water |
| D. | Sugar |
| Answer» C. Water | |
| 805. |
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 | |
| 806. |
In condition of high temperature, following does not occur or occurs at low level__________? |
| A. | Vasodilation |
| B. | Activation of sweat glands |
| C. | Thermogenesis |
| D. | Evaporative cooling |
| Answer» D. Evaporative cooling | |
| 807. |
In chlorophytes the main energy stores are__________? |
| A. | Cellulose |
| B. | Starch |
| C. | Glycogen |
| D. | All of these |
| Answer» C. Glycogen | |
| 808. |
In cell fractionation various components of cells including its organelles can be isolated in different layers depending upon____________? |
| A. | Their physical properties like size & weight |
| B. | Physical properties of the medium like its density |
| C. | Their electrical properties like their charges |
| D. | Both a and b |
| Answer» E. | |
| 809. |
In bryophytes fertilization takes place in___________? |
| A. | Antheridia |
| B. | Archegonia |
| C. | water |
| D. | Ovule |
| Answer» C. water | |
| 810. |
In bacterial categories the bacteria smaller in number are_______________? |
| A. | Gram-ive bacteria |
| B. | Eubacteria |
| C. | Ancient bacteria |
| D. | Gram +ive bacteria |
| Answer» D. Gram +ive bacteria | |
| 811. |
in animals meiosis produces____________? |
| A. | spores |
| B. | gametes |
| C. | both a & b |
| D. | all the above |
| Answer» C. both a & b | |
| 812. |
In animals excess of nitrogen is excreted primarily in form of___________? |
| A. | Creatinine |
| B. | Trimethyamine oxide |
| C. | Pyrimidine |
| D. | Ammonia |
| Answer» E. | |
| 813. |
In animals coordination is achieved by means of_________? |
| A. | Respiratory system |
| B. | Nervous system |
| C. | Endocrine system |
| D. | Both b and c |
| Answer» E. | |
| 814. |
In animals coordination is achieved by means of? |
| A. | Nervous system |
| B. | Endocrine system |
| C. | Respiratory system |
| D. | Both A and B |
| Answer» E. | |
| 815. |
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% | |
| 816. |
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 | |
| 817. |
In an annelids, the contraction of circular muscle results in___________? |
| A. | Lengthening of the body |
| B. | Shortening of the body |
| C. | Widening of body |
| D. | Thinning of body |
| Answer» E. | |
| 818. |
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 | |
| 819. |
In all coelentrates endoderm give rise to__________? |
| A. | nervous system |
| B. | digestive system |
| C. | reproductive system |
| D. | circulatory system |
| Answer» C. reproductive system | |
| 820. |
In all arthropods,the body is covered with a chittinous cuticle which is secreted by the____________? |
| A. | Endodermis |
| B. | Mesophyll |
| C. | Chitin |
| D. | Epidermis |
| Answer» E. | |
| 821. |
In alcoholic fermentation Pyruvic acid is broken down into? |
| A. | Acetaldehyde |
| B. | Methyl alcohol |
| C. | Ethyl alcohol |
| D. | Lactic acid |
| Answer» D. Lactic acid | |
| 822. |
In acoelomates gut is ________ in origin. |
| A. | Ectodermal |
| B. | Endodermal |
| C. | Mesodermal |
| D. | None of these |
| Answer» C. Mesodermal | |
| 823. |
In a hot summer after noon, if your body’s Homeostatic machinery keep your internal temperature quite lower than that of external than this is an example of____________? |
| A. | Positive feed back |
| B. | Negative feed back |
| C. | Feed back |
| D. | Osmoregulation |
| Answer» C. Feed back | |
| 824. |
In 1831, the presence of nucleus in the cells was reported by__________? |
| A. | Robert Koch |
| B. | Robert Hooke |
| C. | Robert Mug Abe |
| D. | Robert Brown |
| Answer» E. | |
| 825. |
Important factors which affect the capacity of haemoglobin to combine with oxygen is |
| A. | Temperature |
| B. | Carbon dioxide |
| C. | pH |
| D. | All of these |
| Answer» E. | |
| 826. |
Immunization by vaccination was first introduced by? |
| A. | Fleming in 1945 |
| B. | Florey & Chain in 1975 |
| C. | Flore & Chain in 1795 |
| D. | Edward Jenner in 1795 |
| Answer» E. | |
| 827. |
If two ends of fractured bone are opened and kept united via screws and wires drilled in bone substance. This step in fracture repair is called___________? |
| A. | Open reduction |
| B. | Closed Fixation |
| C. | Open fixation |
| D. | Immobilization |
| Answer» B. Closed Fixation | |
| 828. |
If the concentration of enzyme is kept constant and amount of substrate is increased a point is reached where increase in substrates concentration does not affect the reaction rate because of____________________? |
| A. | Enzymes get denatured at higher substrate conc |
| B. | Rate of reaction is indirectly proportional to substrate concentration at this point |
| C. | All the active sites on enzyme molecule are occupied |
| D. | None of these |
| Answer» D. None of these | |
| 829. |
If more substrate to already occurring enzymatic reaction is added more enzyme activity is seen because_____________? |
| A. | There is probably more substrate present than there is enzyme. |
| B. | There is probably more enzayme available than there is substrate. |
| C. | There is probably more product present than there is either substrate or enzyme. |
| D. | The enzyme substrate complex is probably failing to form during the reaction |
| Answer» C. There is probably more product present than there is either substrate or enzyme. | |
| 830. |
If more substrate to already occurring enzymatic reaction is added and there is no effect on the rate of the reaction what is the form given to this situation___________? |
| A. | Saturation |
| B. | Denaturation |
| C. | Composition |
| D. | Inhibition |
| Answer» B. Denaturation | |
| 831. |
If enzyme concentration is low than substrate pH and temperature values are equal to requirement then which of the following will increase rate of reaction____________________? |
| A. | increase in concentration of enzyme |
| B. | increase in concentration of substrate |
| C. | increase in pH |
| D. | increase in temperature |
| Answer» B. increase in concentration of substrate | |
| 832. |
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 | |
| 833. |
If a plasmolysed plant cell is placed in water the cell will___________? |
| A. | Burst |
| B. | Be Killed |
| C. | Be deplasmolysed |
| D. | Show no change in it |
| Answer» D. Show no change in it | |
| 834. |
If a man having blood group AB marries a woman who is heterozygous for blood group, what is the probability of their first child having blood group B? |
| A. | 40% |
| B. | 45% |
| C. | 50% |
| D. | 71% |
| Answer» D. 71% | |
| 835. |
If a cross section of a sarcomere is seen, each myosin is surrounded by how many actin molecules: |
| A. | 9 |
| B. | 5 |
| C. | 6 |
| D. | 7 |
| Answer» D. 7 | |
| 836. |
I can break down fatty acid to succinate__________? |
| A. | Peroxisome |
| B. | Glyoxisome |
| C. | Lysosome |
| D. | Golgi bodies |
| Answer» C. Lysosome | |
| 837. |
Hydra is an example of ______________ feeder? |
| A. | Fluid |
| B. | Macrophagous |
| C. | Fluid |
| D. | All of these |
| Answer» C. Fluid | |
| 838. |
Hydra has___________? |
| A. | Brain |
| B. | Nerves |
| C. | Neuron-cells |
| D. | All of these |
| Answer» D. All of these | |
| 839. |
Hydra has no specialized excretory system because: |
| A. | It does not produce waste material |
| B. | Due to absence of mesoderm |
| C. | The whole body cells are in contact with water |
| D. | It has pseudocoelom |
| Answer» D. It has pseudocoelom | |
| 840. |
Hunger pangs usually begin ______ after the previous meal. |
| A. | 2-4 hours |
| B. | 6-8 hours |
| C. | 10-12 hours |
| D. | 12-24 hours |
| Answer» E. | |
| 841. |
Hunger contractions are _____ contractions? |
| A. | Antiperistalsis |
| B. | Peristalsis |
| C. | Voluntary |
| D. | None of these |
| Answer» C. Voluntary | |
| 842. |
Humming bird is an example of________________? |
| A. | Cold blooded animal |
| B. | Ectotherm |
| C. | Endotherm |
| D. | Heterotherm |
| Answer» E. | |
| 843. |
Humans can hear in the range of ______ to _______Hertz (Hz).? |
| A. | 10 Hz to 10,000 Hz. |
| B. | 20 Hz to 20,000 Hz. |
| C. | 30 Hz to 30,000 Hz. |
| D. | 40 Hz to 40,000 Hz. |
| Answer» C. 30 Hz to 30,000 Hz. | |
| 844. |
Human brain contains__________neurons. |
| A. | 10,000,00 |
| B. | 100,000,000 |
| C. | 100,000,000,000 |
| D. | 1000 |
| Answer» D. 1000 | |
| 845. |
Human body makes about 20 million erythrocytes in__________? |
| A. | One Second |
| B. | Two Seconds |
| C. | Three Seconds |
| D. | Four Seconds |
| Answer» B. Two Seconds | |
| 846. |
Human blood is an example of__________? |
| A. | Organelle |
| B. | Tissues |
| C. | Organic compound |
| D. | Inorganic compounds |
| Answer» C. Organic compound | |
| 847. |
How many vertebrae are present in vertebral column of man? |
| A. | 33 vertebrae |
| B. | 33 pairs of vertebrae |
| C. | 25 vertebrae |
| D. | 31 vertebrae |
| Answer» B. 33 pairs of vertebrae | |
| 848. |
How many vertebrae are present in thoracic region? |
| A. | 7 |
| B. | 12 |
| C. | 5 |
| D. | 4 |
| Answer» C. 5 | |
| 849. |
How many vertebrae are present in lumbar region? |
| A. | 7 |
| B. | 12 |
| C. | 5 |
| D. | 4 |
| Answer» D. 4 | |
| 850. |
How many vertebrae are present in coccyx? |
| A. | 7 |
| B. | 12 |
| C. | 9 |
| D. | 4 |
| Answer» B. 12 | |