MCQOPTIONS
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MCQOPTIONS
This section includes 5751 Mcqs, each offering curated multiple-choice questions to sharpen your Biology knowledge and support exam preparation. Choose a topic below to get started.
| 1801. |
After fertilization seed is developed from |
| A. | Embryo |
| B. | Embryo sac |
| C. | Ovule |
| D. | Zygote |
| Answer» D. Zygote | |
| 1802. |
Which of the following cell is diploid? |
| A. | Synergid |
| B. | Antipodal cell |
| C. | Secondary nucleus |
| D. | Egg cell |
| Answer» D. Egg cell | |
| 1803. |
Pollen grains germinate on |
| A. | Any surface |
| B. | Stigma |
| C. | soil |
| D. | Ovule |
| Answer» C. soil | |
| 1804. |
The nature of nitroginious waste and their excretion depend on the large amount of |
| A. | C6H12O6 |
| B. | NH2 CONH2 |
| C. | H2O |
| D. | CO2 |
| Answer» D. CO2 | |
| 1805. |
Transfer of a pollen grain to the stigma of the same plant is called |
| A. | Antogamy |
| B. | Geitonogamy |
| C. | Allogamy |
| D. | Homogamy |
| Answer» C. Allogamy | |
| 1806. |
Micropylar end lacks |
| A. | Egg cell |
| B. | Synergids |
| C. | Egg-apparatus |
| D. | Integument |
| Answer» E. | |
| 1807. |
Find the incorrect statement regarding mechanism of urine formation in man |
| A. | The glomerular filteration rate is about 125 ml/min |
| B. | Tubular secretion takes place in the PCT |
| C. | Aldostrone induces greater reabsorption of sodium |
| D. | The counter current system contributes in diluting the urine |
| Answer» E. | |
| 1808. |
Renin is secreted by |
| A. | PCT |
| B. | DCT |
| C. | LOH |
| D. | JG cells |
| Answer» E. | |
| 1809. |
Diabities incipidus is due to |
| A. | Hyposecretion of vasopressin |
| B. | Hyposecretion of insulin |
| C. | Hyposecretion insulin |
| D. | Hyposecretion vaspresssin |
| Answer» B. Hyposecretion of insulin | |
| 1810. |
Deamination is proccess in which ... |
| A. | Poisonous urea is removed from the blood and it occures in kidney |
| B. | Amino acid is absorbed from the digested food and it occur in intestinal |
| C. | Amino acid combined with ammonia to from protein |
| D. | Amino acid broken down to release CO2 and NH2 |
| Answer» E. | |
| 1811. |
Peritubuler is in |
| A. | Cortex |
| B. | Deep in medulla |
| C. | Calyces |
| D. | Surround to duct of bellini |
| Answer» B. Deep in medulla | |
| 1812. |
the least toric nitrogen waste of urine is |
| A. | Ammonia |
| B. | Allantois |
| C. | Urea |
| D. | Uric acid |
| Answer» E. | |
| 1813. |
Urine produced by human kidney is concertratal by _________ times than the initial filtrate formed |
| A. | 2 |
| B. | 300 |
| C. | 4 |
| D. | 1200 |
| Answer» D. 1200 | |
| 1814. |
Transmination process takes place in |
| A. | Liver |
| B. | Kidney |
| C. | Heart |
| D. | All of above |
| Answer» B. Kidney | |
| 1815. |
Angitensigngen I is secreted by |
| A. | Pencreas |
| B. | JG cells |
| C. | Liver |
| D. | Kidney |
| Answer» D. Kidney | |
| 1816. |
Passage of urine |
| A. | Duct of belini - urethra - ureters - urinarray bladder |
| B. | Urinary bladder - urethra - urters - calyces |
| C. | Duct of ballini - calyces - urethra - urinary bladder |
| D. | Duct of bellini - calyces - ureters - urinary bladder |
| Answer» E. | |
| 1817. |
How many NH3 required for a urea... |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 1818. |
Inflammation of joints due to accumulation of uric acid crystals is called as ... |
| A. | Gout |
| B. | Myasthenia gravis |
| C. | Osteoporosis |
| D. | Osteomalacia |
| Answer» D. Osteomalacia | |
| 1819. |
The Organism which maintain an independent concentration of their extracellular fluids |
| A. | Osmoconfirmers |
| B. | Osmoregulators |
| C. | a & b both |
| D. | None of above |
| Answer» C. a & b both | |
| 1820. |
In Amoeba amonia is excreted by |
| A. | Food vacuole |
| B. | Coutractile vacuole |
| C. | Plasma membrance |
| D. | All of these |
| Answer» C. Plasma membrance | |
| 1821. |
Protein rich diet bring about relatively no change in one of the following constituents of urine |
| A. | Urea |
| B. | Creatinine |
| C. | Uric acid |
| D. | Ammonium salts |
| Answer» E. | |
| 1822. |
A process takes place in PCT is |
| A. | Absorption of H+ to maintain PH |
| B. | Secretion of buffer HCO3 |
| C. | Reabsorption of NACL |
| D. | Secretion of urea |
| Answer» D. Secretion of urea | |
| 1823. |
In cortical nephrones (LOH = Loop of henle) |
| A. | LOH is long |
| B. | coloecting tubule is short |
| C. | LOH is sort |
| D. | Absesnce of LOH |
| Answer» D. Absesnce of LOH | |
| 1824. |
Involving mainly in RAAS |
| A. | Angiotensin |
| B. | Aldosteron |
| C. | Renin |
| D. | All of these |
| Answer» E. | |
| 1825. |
The mechanism of urine formation in nephorn involves |
| A. | Ultrafilteration |
| B. | Secretion |
| C. | Reabrorption |
| D. | All of above |
| Answer» E. | |
| 1826. |
Loop of henle and collecting ducts are locketed in kidney is.... |
| A. | Cortex |
| B. | Medulla pyramid |
| C. | Columns of bertini |
| D. | Calyces |
| Answer» C. Columns of bertini | |
| 1827. |
Which one of the following is an example of free-nuclear endosperm |
| A. | Coconut water |
| B. | Castor |
| C. | Sugarcane juice |
| D. | Groundnut |
| Answer» B. Castor | |
| 1828. |
Function of ANF is |
| A. | Increase the blood pressure |
| B. | Decrease the blood pressure |
| C. | Diulting the blood |
| D. | Concentrating the blood |
| Answer» C. Diulting the blood | |
| 1829. |
Osmolarity of interstitial fluid in cortex is |
| A. | 1200 mosmoiL-1 |
| B. | 900 mosmoiL-1 |
| C. | 600 mosmoiL-1 |
| D. | 300 mosmoiL-1 |
| Answer» E. | |
| 1830. |
According to solubility in water |
| A. | NH3 > uric acid > urea |
| B. | NH3 > urea > uric acid |
| C. | Uric acid> urea > NH3 |
| D. | Uric acid > NH3 > urea |
| Answer» C. Uric acid> urea > NH3 | |
| 1831. |
As compared to efferent arterule the afferent arteriont of kidney is |
| A. | Shorter and wider |
| B. | Shorter and narrower |
| C. | Longer and wider |
| D. | Longer and narrower |
| Answer» B. Shorter and narrower | |
| 1832. |
Which is the most resistant natural organic material ? |
| A. | Cellulose |
| B. | Pectin |
| C. | Suberin |
| D. | Sporopollenin |
| Answer» E. | |
| 1833. |
Pollen grains represent |
| A. | The future sporophyte |
| B. | The sporophyte |
| C. | The gametophyte |
| D. | The male gametophyte |
| Answer» E. | |
| 1834. |
Tapetum provides |
| A. | protection to embryo |
| B. | Nourishment to pollen grains |
| C. | Nourishment to embryo |
| D. | Protection to endosperm |
| Answer» C. Nourishment to embryo | |
| 1835. |
Cross pollination has an advantage of |
| A. | Mutatio |
| B. | polyploidy formation |
| C. | Genetic recombination |
| D. | Crossing over |
| Answer» D. Crossing over | |
| 1836. |
Endothecium in anther helps in |
| A. | Dehiscence of anther |
| B. | Nutrition to pollen |
| C. | Germination of pollen |
| D. | Formation of male gamete |
| Answer» B. Nutrition to pollen | |
| 1837. |
Stamen show homology with |
| A. | Gametophyte |
| B. | male cone |
| C. | Microsporophyll |
| D. | Sporangium |
| Answer» D. Sporangium | |
| 1838. |
How many haploid nuclei are involved in double fertilization ? |
| A. | Four |
| B. | Two |
| C. | Five |
| D. | Three |
| Answer» D. Three | |
| 1839. |
In dicot embrogenesis, the firast division in zygote is generally |
| A. | oblique |
| B. | longitudinal |
| C. | Transverse |
| D. | uncertain |
| Answer» D. uncertain | |
| 1840. |
Typical anther normally consists of |
| A. | One lobe Four sporangia |
| B. | Two lobe Two sporangia |
| C. | Two lobe Four sporangia |
| D. | One lobe Two sporangia |
| Answer» D. One lobe Two sporangia | |
| 1841. |
The pedicel of the female flower coils after pollination in |
| A. | Lotu |
| B. | Hydrilla |
| C. | Vallisneria |
| D. | Trapa |
| Answer» D. Trapa | |
| 1842. |
Nucellus is mass of |
| A. | Parenchymatous tisse |
| B. | Sclerenchymatous tissue |
| C. | Meristematic tissue |
| D. | Collenchymatous tissue |
| Answer» B. Sclerenchymatous tissue | |
| 1843. |
During the development of monosporic development of embryo sac the nucleus of the functional megaspore divides |
| A. | Two time |
| B. | Three times |
| C. | One time |
| D. | Repeatedly |
| Answer» C. One time | |
| 1844. |
In triple fusion, how many male gamete participate ? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» B. 2 | |
| 1845. |
Style is |
| A. | a is delicate hollow tube |
| B. | a tough hollow tube |
| C. | a delicate filament |
| D. | called pollen tube |
| Answer» D. called pollen tube | |
| 1846. |
The innermost layer of the wall of microsporangium is called |
| A. | Endothecium |
| B. | Endodermis |
| C. | Tapetum |
| D. | Intine |
| Answer» D. Intine | |
| 1847. |
Germpores are actually |
| A. | Apertures in intine |
| B. | Thick area in intine |
| C. | Apertures in exine |
| D. | Thin area in intine |
| Answer» D. Thin area in intine | |
| 1848. |
In angiosperm the endosperm is formed |
| A. | In the nucellu |
| B. | In the embryo sac |
| C. | In the seed |
| D. | In the anther |
| Answer» C. In the seed | |
| 1849. |
Radicle tip is derived from |
| A. | Suspensor |
| B. | Proembryo |
| C. | Basal cell |
| D. | Hypophysis |
| Answer» E. | |
| 1850. |
Which one of the following is the example of mitosis ? |
| A. | Megasporongensi |
| B. | Microsporogensis |
| C. | Pollen formation |
| D. | Division of generative cell |
| Answer» C. Pollen formation | |