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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.
| 2751. |
Most abundant organic compound on earth is [C.B.S.E.2001] [karnataka- 2000] |
| A. | Protein |
| B. | Cellulose |
| C. | Lipid |
| D. | Steroid |
| Answer» B. Cellulose | |
| 2752. |
The product is realized from which site of the enzyme? |
| A. | Simple site |
| B. | active site |
| C. | Complex site |
| D. | Inactive site |
| Answer» C. Complex site | |
| 2753. |
Find out the correct group of enzyme which is activated by calcium? |
| A. | Nitric oxide Synthetase, protein phosphatase , adenylkinase |
| B. | Acetyl co. A Synthetase, fructose isomerase protein phosphatase |
| C. | Succinic dehydrogenase, Cytochrome oxidase, Aldolase |
| D. | All above |
| Answer» B. Acetyl co. A Synthetase, fructose isomerase protein phosphatase | |
| 2754. |
Vanadium is necessary for the activation of which enzyme? |
| A. | Kinase |
| B. | Maltase |
| C. | Nitrogenase |
| D. | Enolase |
| Answer» D. Enolase | |
| 2755. |
Plant embryo is a mass of - |
| A. | cell |
| B. | Uncertain tissue |
| C. | Collection of plant tissues |
| D. | Miniature plant |
| Answer» E. | |
| 2756. |
Pollen tube, entering in embryo sac has |
| A. | 3 male gamete |
| B. | 1 male gametes |
| C. | 2 male gametes |
| D. | 4 male gametes |
| Answer» D. 4 male gametes | |
| 2757. |
Bond formed between the first phosphate group and adenosine in ATP is |
| A. | Nitrophosphate bond |
| B. | Adenophosphate bond |
| C. | Phosphoanhydride bond |
| D. | Phosphoester bond |
| Answer» E. | |
| 2758. |
After fertilization the ovule develops into |
| A. | Endosperm |
| B. | seed |
| C. | Embryo sac |
| D. | Fruit |
| Answer» C. Embryo sac | |
| 2759. |
A microspore is a |
| A. | Male gamate |
| B. | First cell of male gametophyte |
| C. | Last cell of male gametophyte |
| D. | Diploid cell |
| Answer» C. Last cell of male gametophyte | |
| 2760. |
The embryo sac is produced from |
| A. | Microscope |
| B. | Zygote |
| C. | Egg cell |
| D. | Megaspore |
| Answer» E. | |
| 2761. |
Cells of nucellus are always |
| A. | Haploid |
| B. | Triploid |
| C. | Diploid |
| D. | Enucleated |
| Answer» D. Enucleated | |
| 2762. |
Pollen grain are produced in |
| A. | Nucellu |
| B. | Stigma |
| C. | Anther |
| D. | Chalaza |
| Answer» D. Chalaza | |
| 2763. |
Female gametophyte is also known as |
| A. | ovule |
| B. | egg-apparatus |
| C. | Nucellus |
| D. | Embryo sac |
| Answer» E. | |
| 2764. |
Ovule is attached to the placenta by |
| A. | pedical |
| B. | Hilum |
| C. | Funicle |
| D. | petiole |
| Answer» D. petiole | |
| 2765. |
In flowering plants, fertilization occur in |
| A. | Ovary |
| B. | Embryo sac |
| C. | Nucellus |
| D. | Ovule |
| Answer» C. Nucellus | |
| 2766. |
Carpel is formed of |
| A. | Two part |
| B. | Three part |
| C. | Four part |
| D. | Seven part |
| Answer» C. Four part | |
| 2767. |
Fruit is a modification of |
| A. | Female gametophyte |
| B. | ovary |
| C. | carpel |
| D. | Nucellus |
| Answer» C. carpel | |
| 2768. |
Embryo sac contains |
| A. | 3 egg |
| B. | 2 eggs |
| C. | 1 egg |
| D. | 4 eggs |
| Answer» D. 4 eggs | |
| 2769. |
The unit of female reproductive body in flower is |
| A. | Carpel |
| B. | Megasporangium |
| C. | Ovule |
| D. | Ovary |
| Answer» B. Megasporangium | |
| 2770. |
The seed coat develops from |
| A. | Embryo sac |
| B. | Inner integument |
| C. | Nucellus |
| D. | Outer integument |
| Answer» E. | |
| 2771. |
Stamen is a modification of |
| A. | Leaf |
| B. | Microsporophyll |
| C. | Megasporophyll |
| D. | Shoot |
| Answer» C. Megasporophyll | |
| 2772. |
Zygote is formed inside the |
| A. | Stigma |
| B. | Style |
| C. | Female gametophyte |
| D. | Seed |
| Answer» D. Seed | |
| 2773. |
The arrangement of flowers on the flora axis is known as |
| A. | Venation |
| B. | Phyllotaxy |
| C. | Anthology |
| D. | Aestivation |
| Answer» D. Aestivation | |
| 2774. |
Pollen tube enters the embryo sac through |
| A. | Integument |
| B. | Micropyle |
| C. | chalaza |
| D. | Funicle |
| Answer» C. chalaza | |
| 2775. |
Embryo of flowering plant is always - |
| A. | Haploid (n) |
| B. | Diploid (2n) |
| C. | Triploid (3n) |
| D. | Tetraploid (4n) |
| Answer» C. Triploid (3n) | |
| 2776. |
An anther consists of |
| A. | one microsporangium |
| B. | four microsporangia |
| C. | Two microsporangia |
| D. | many microsporangia |
| Answer» C. Two microsporangia | |
| 2777. |
Plant embryo develops from. |
| A. | seed |
| B. | Fruit |
| C. | Zygote |
| D. | Flower |
| Answer» D. Flower | |
| 2778. |
An egg-apparatus contains |
| A. | An egg + two antipodal |
| B. | An egg + Secondary nucleus |
| C. | An egg + Two synergids |
| D. | Antipodal cell + synergid |
| Answer» D. Antipodal cell + synergid | |
| 2779. |
In angiosperm the endosperm nucleus is |
| A. | Triploid |
| B. | Diploid |
| C. | Tetraploid |
| D. | Haploid |
| Answer» B. Diploid | |
| 2780. |
Nucellus in seed is represented by |
| A. | Testa |
| B. | Peri carp |
| C. | Tagmen |
| D. | Seed Coat |
| Answer» C. Tagmen | |
| 2781. |
Green glands are excretony in function which are found in |
| A. | Spiders |
| B. | Moth |
| C. | Scropions |
| D. | Prawn |
| Answer» E. | |
| 2782. |
Excretion of nitrogenous waste produt is remirolid form occure in |
| A. | ureotelic animals |
| B. | Ammorotelic animals |
| C. | ureotelic animals |
| D. | ammiotes |
| Answer» D. ammiotes | |
| 2783. |
Function of loop of Henle is... |
| A. | Formation of urine |
| B. | Passage of urine |
| C. | Conservation of water |
| D. | Filtration of blood |
| Answer» D. Filtration of blood | |
| 2784. |
What is the approximately length and diameter of uriniterous tubule? |
| A. | 3 cm length,diameter 35um |
| B. | 3 cm length,diameter 20.30um |
| C. | 30 cm length,diameter 25um |
| D. | 25 cm length,diameter 20um |
| Answer» C. 30 cm length,diameter 25um | |
| 2785. |
Man is.... |
| A. | Ureotelic |
| B. | Uricotelic |
| C. | Ammonotelic |
| D. | Both b and c |
| Answer» C. Ammonotelic | |
| 2786. |
”Columns of Bertini” is the kidney of manimals are found as the extersion of |
| A. | Medulla into cortex |
| B. | Cortex into medulla |
| C. | Medulla into pelvis |
| D. | Pelvis into ureter |
| Answer» C. Medulla into pelvis | |
| 2787. |
Those animals which excrete a large amount of NH3 are... |
| A. | Terretrial |
| B. | Eegg lying |
| C. | Amphibions |
| D. | Aquatic |
| Answer» E. | |
| 2788. |
Urea formation occure by: |
| A. | Arginine cycle |
| B. | Krebs cycle |
| C. | Ornithine cycle |
| D. | Citulline cycle |
| Answer» D. Citulline cycle | |
| 2789. |
If liver from body is removed then which component of blood increases |
| A. | Ammonia |
| B. | Protein |
| C. | urea |
| D. | Uric acid |
| Answer» B. Protein | |
| 2790. |
Which of the following is a metabolic waste of nitrogenous substances? |
| A. | NH3,urea,CO2 |
| B. | NH3,aranine, urea |
| C. | Urea, NH3, creatinine |
| D. | Urea, oxugen, SO2 |
| Answer» D. Urea, oxugen, SO2 | |
| 2791. |
Each human kidney has nearly... |
| A. | 10,000 neophrons |
| B. | 50,000 neophrons |
| C. | 1,00,000 neophrons |
| D. | 1 million neophrons |
| Answer» E. | |
| 2792. |
Which of the following are uricotelic animals? |
| A. | Rohu and Frog |
| B. | Lizard and Crow |
| C. | Camel and Frog |
| D. | Earthworm and eagle |
| Answer» C. Camel and Frog | |
| 2793. |
Nitrogenous waste in the Malpighian tubule flows into... |
| A. | PCT |
| B. | Intestine |
| C. | Haemocoel |
| D. | DCT |
| Answer» C. Haemocoel | |
| 2794. |
The glomerular filteration rate in a normal adult is nearly |
| A. | 200 ml/min |
| B. | 250 ml/min |
| C. | 125 ml/min |
| D. | 170 ml/min |
| Answer» D. 170 ml/min | |
| 2795. |
Urinary Excretion of Na is regulated by .... |
| A. | Anteroir pituitary |
| B. | Posterior Pituitary |
| C. | Adrenal cortex |
| D. | Adenal medulla |
| Answer» D. Adenal medulla | |
| 2796. |
Ascending limb of LOH is Segment to water but nearly imperable to salts |
| A. | FTFT |
| B. | FTTF |
| C. | TFTT |
| D. | FFTF |
| Answer» B. FTTF | |
| 2797. |
For maintanance of osmoregulation by animals where urea is sored? |
| A. | Medulla of Kidney |
| B. | Cortex of Kidney |
| C. | Renal of pelvis |
| D. | Renal artery |
| Answer» B. Cortex of Kidney | |
| 2798. |
Sodium water and phosphate reabsorption is maximum in |
| A. | Loop of henle |
| B. | PCT |
| C. | DCT |
| D. | Collecting tuble |
| Answer» C. DCT | |
| 2799. |
In man, the area is mainly produced in |
| A. | Liver |
| B. | Kidneys |
| C. | Gall bladder |
| D. | Spleen |
| Answer» B. Kidneys | |
| 2800. |
Ornithine cycle ic found in.... |
| A. | Kidney |
| B. | Liver |
| C. | Spleen |
| D. | Pencreas |
| Answer» C. Spleen | |