MCQOPTIONS
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MCQOPTIONS
This section includes 197 Mcqs, each offering curated multiple-choice questions to sharpen your NEET-UG knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Extraction of gold and silver involves leaching with CN– Silver is later recovered by : |
| A. | liquation |
| B. | distillation |
| C. | zone refining |
| D. | displacement with Zn |
| Answer» E. | |
| 2. |
Which of the following statement is not correct ? |
| A. | Insulin maintains sugar level in the blood of a human body. |
| B. | Ovalbumin is a simple food reserve in egg white |
| C. | Blood proteins thrombin and fibrinogen are involved in blood clotting |
| D. | Denaturation makes the proteins more active |
| Answer» E. | |
| 3. |
With respect to the conformers of ethane, which of the following statements is true? |
| A. | Bond angle remains same but bond length changes |
| B. | Bond angle changes but bond length remains same |
| C. | Both bond angle and bond length changes |
| D. | Both bond angles and bond length remains same |
| Answer» E. | |
| 4. |
A capacitor is charged by a battery. The battery is removed and another identical uncharged capacitor is connected in parallel. The total electrostatic energy of resulting system : |
| A. | increases by a factor of 4 |
| B. | decreases by a factor of 2 |
| C. | remains the same |
| D. | increases by a factor of 2 |
| Answer» C. remains the same | |
| 5. |
Which of the following RNAs should be most abundant in animal cell ? |
| A. | r-RNA |
| B. | t-RNA |
| C. | m-RNA |
| D. | mi-RNA |
| Answer» B. t-RNA | |
| 6. |
Flowers which have single ovule in the ovary and are packed into inflorescence are usually pollinated by |
| A. | Water |
| B. | Bee |
| C. | Wind |
| D. | Bat |
| Answer» D. Bat | |
| 7. |
Thalassemia and sickle cell anemia are caused due to a problem in globin molecule synthesis. Select the correct statement. |
| A. | Both are due to a qualitative defect in globin chain synthesis |
| B. | Both are due to a quantitative defect in globin chain synthesis |
| C. | Thalassemia is due to less synthesis of globin molecules |
| D. | Sickle cell anemia is due to a quantitative problem of globin molecules |
| Answer» D. Sickle cell anemia is due to a quantitative problem of globin molecules | |
| 8. |
Identify the wrong statement in context of heartwood |
| A. | Organic compounds are deposited in it |
| B. | It is highly durable |
| C. | It conducts water and minerals efficiently |
| D. | It comprises dead elements with highly lignified walls |
| Answer» D. It comprises dead elements with highly lignified walls | |
| 9. |
The water potential of pure water is |
| A. | Zero |
| B. | Less than zero |
| C. | More than zero but less than one |
| D. | More than one |
| Answer» B. Less than zero | |
| 10. |
Which of the following in sewage treatment removes suspended solids? |
| A. | Tertiary treatment |
| B. | Secondary treatment |
| C. | Primary treatment |
| D. | Sludge treatment |
| Answer» D. Sludge treatment | |
| 11. |
The function of copper ions in copper releasing IUD's is : |
| A. | They suppress sperm motility and fertilising capacity of sperms |
| B. | They inhibit gametogenesis |
| C. | They make uterus unsuitable for implantation |
| D. | They inhibit ovulation |
| Answer» B. They inhibit gametogenesis | |
| 12. |
DNA replication in bacteria occurs |
| A. | During S-phase |
| B. | Within nucleolus |
| C. | Prior to fission |
| D. | Just before transcription |
| Answer» D. Just before transcription | |
| 13. |
Which of the following components provides sticky character to the bacterial cell? |
| A. | Cell wall |
| B. | Nuclear membrane |
| C. | Plasma membrane |
| D. | Glycocalyx |
| Answer» E. | |
| 14. |
In case of a couple where the male is having a very low sperm count, which technique will be suitable for fertilisation? |
| A. | Intrauterine transfer |
| B. | Gamete intracytoplasmic fallopian transfer |
| C. | Artificial Insemination |
| D. | Intracytoplasmic sperm injection |
| Answer» D. Intracytoplasmic sperm injection | |
| 15. |
Myelin sheath is produced by |
| A. | Schwann Cells and Oligodendrocytes |
| B. | Astrocytes and Schwann Cells |
| C. | Oligodendrocytes and Osteoclasts |
| D. | Osteoclasts and Astrocytes |
| Answer» B. Astrocytes and Schwann Cells | |
| 16. |
Alexander Von Humbolt described for the first time |
| A. | Ecological Biodiversity |
| B. | Laws of limiting factor |
| C. | Species area relationships |
| D. | Population Growth equation |
| Answer» D. Population Growth equation | |
| 17. |
Hypersecretion of Growth Hormone in adults does not cause further increase in height, because |
| A. | Growth Hormone becomes inactive in adults |
| B. | Epiphyseal plates close after adolescence |
| C. | Bones loose their sensitivity to Growth Hormone in adults |
| D. | Muscle fibres do not grow in size after birth |
| Answer» C. Bones loose their sensitivity to Growth Hormone in adults | |
| 18. |
Receptor sites for neurotransmitters are present on |
| A. | Membranes of synaptic vesicles |
| B. | Pre-synaptic membrane |
| C. | Tips of axons |
| D. | Post-synaptic membrane |
| Answer» E. | |
| 19. |
MALT constitutes about ___________ percent of the lymphoid tissue in human body. |
| A. | 50% |
| B. | 20% |
| C. | 70% |
| D. | 10% |
| Answer» B. 20% | |
| 20. |
Anaphase promoting complex (APC) is a protein degradation machinery necessary for proper mitosis of animal cells. If APC is defective in a human cell, which of the following is expected to occur? |
| A. | Chromosomes will not condense |
| B. | Chromosomes will be fragmented |
| C. | Chromosomes will not segregate |
| D. | Recombination of chromosome arms will occur |
| Answer» D. Recombination of chromosome arms will occur | |
| 21. |
The morphological nature of the edible part of coconut is |
| A. | Perisperm |
| B. | Cotyledon |
| C. | Endosperm |
| D. | Pericarp |
| Answer» D. Pericarp | |
| 22. |
Which of the following options best represents the enzyme composition of pancreatic juice? |
| A. | Amylase, peptidase, trypsinogen, rennin |
| B. | Amylase, pepsin, trypsinogen, maltase |
| C. | Peptidase, amylase, pepsin, rennin |
| D. | Lipase, amylase, trypsinogen, procarboxypeptidase |
| Answer» E. | |
| 23. |
Artificial selection to obtain cows yielding higher milk output represents |
| A. | Stabilizing selection as it stabilizes this character in the population |
| B. | Directional as it pushes the mean of the character in one direction |
| C. | Disruptive as it splits the population into two one yielding higher output and the other lower output |
| D. | Stabilizing followed by disruptive as it stabilizes the population to produce higher yielding cows |
| Answer» C. Disruptive as it splits the population into two one yielding higher output and the other lower output | |
| 24. |
An important characteristic that Hemichordates share with Chordates is |
| A. | Absence of notochord |
| B. | Ventral tubular nerve cord |
| C. | Pharynx with gill slits |
| D. | Pharynx without gill slits |
| Answer» D. Pharynx without gill slits | |
| 25. |
Fruit and leaf drop at early stages can be prevented by the application of |
| A. | Cytokinins |
| B. | Ethylene |
| C. | Auxins |
| D. | Gibberellic acid |
| Answer» D. Gibberellic acid | |
| 26. |
The vascular cambium normally gives rise to |
| A. | Phelloderm |
| B. | Primary phloem |
| C. | Secondary xylem |
| D. | Periderm |
| Answer» D. Periderm | |
| 27. |
Homozygous purelines in cattle can be obtained by |
| A. | mating of related individuals of same breed |
| B. | mating of unrelated individuals of same breed |
| C. | mating of individuals of different breed |
| D. | mating of individuals of different species |
| Answer» B. mating of unrelated individuals of same breed | |
| 28. |
A decrease in blood pressure/volume will not cause the release of |
| A. | Renin |
| B. | Atrial Natriuretic Factor |
| C. | Aldosterone |
| D. | ADH |
| Answer» C. Aldosterone | |
| 29. |
Which one of the following statements is not valid for aerosols? |
| A. | They are harmful to human health |
| B. | They alter rainfall and monsoon patterns |
| C. | They cause increased agricultural productivity |
| D. | They have negative impact on agricultural land |
| Answer» D. They have negative impact on agricultural land | |
| 30. |
Which one from those given below is the period for Mendel's hybridization experiments? |
| A. | 1856 - 1863 |
| B. | 1840 - 1850 |
| C. | 1857 - 1869 |
| D. | 1870 - 1877 |
| Answer» B. 1840 - 1850 | |
| 31. |
In Bougainvillea thorns are the modifications of |
| A. | Stipules |
| B. | Adventitious root |
| C. | Stem |
| D. | Leaf |
| Answer» D. Leaf | |
| 32. |
GnRH, a hypothalamic hormone, needed in reproduction, acts on |
| A. | Anterior pituitary gland and stimulates secretion of LH and oxytocin |
| B. | Anterior pituitary gland and stimulates secretion of LH and FSH |
| C. | Posterior pituitary gland and stimulates secretion of oxytocin and FSH |
| D. | Posterior pituitary gland and stimulates secretion of LH and relaxin |
| Answer» C. Posterior pituitary gland and stimulates secretion of oxytocin and FSH | |
| 33. |
Lungs are made up of air-filled sacs the alveoli. They do not collapse even after forceful expiration, because of : |
| A. | Residual Volume |
| B. | Inspiratory Reserve Volume |
| C. | Tidal Volume |
| D. | Expiratory Reserve Volume |
| Answer» B. Inspiratory Reserve Volume | |
| 34. |
Among the following characters, which one was not considered by Mendel in his experiments on pea? |
| A. | Stem – Tall or Dwarf |
| B. | Trichomes – Glandular or non-glandular |
| C. | Seed – Green or Yellow |
| D. | Pod – Inflated or Constricted |
| Answer» C. Seed – Green or Yellow | |
| 35. |
Functional megaspore in an angiosperm develops into |
| A. | Ovule |
| B. | Endosperm |
| C. | Embryo sac |
| D. | Embryo |
| Answer» D. Embryo | |
| 36. |
The DNA fragments separated on an agarose gel can be visualised after staining with |
| A. | Bromophenol blue |
| B. | Acetocarmine |
| C. | Aniline blue |
| D. | Ethidium bromide |
| Answer» E. | |
| 37. |
Asymptote in a logistic growth curve is obtained when |
| A. | The value of r approaches zero |
| B. | K = N |
| C. | K > N |
| D. | K < N |
| Answer» C. K > N | |
| 38. |
Which among these is the correct combination of aquatic mammals? |
| A. | Seals, Dolphins, Sharks |
| B. | Dolphins, Seals, Trygon |
| C. | Whales, Dolphins, Seals |
| D. | Trygon, Whales, Seals |
| Answer» D. Trygon, Whales, Seals | |
| 39. |
Which of the following RNAs should be most abundant in animal cell? |
| A. | r-RNA |
| B. | t-RNA |
| C. | m-RNA |
| D. | mi-RNA |
| Answer» B. t-RNA | |
| 40. |
In case of poriferans the spongocoel is lined with flagellated cells called : |
| A. | Ostia |
| B. | Oscula |
| C. | Choanocytes |
| D. | Mesenchymal cells |
| Answer» D. Mesenchymal cells | |
| 41. |
Which of the following is correctly matched for the product produced by them? |
| A. | Acetobacter aceti : Antibiotics |
| B. | Methanobacterium : Lactic acid |
| C. | Penicillium notatum : Acetic acid |
| D. | Saccharomyces cerevisiae : Ethanol |
| Answer» E. | |
| 42. |
Zygotic meiosis is characteristic of |
| A. | Marchantia |
| B. | Fucus |
| C. | Funaria |
| D. | Chlamydomonas |
| Answer» E. | |
| 43. |
The genotypes of a Husband and Wife are IAIB and IAi. Among the blood types of their children, how many different genotypes and phenotypes are possible? |
| A. | 3 genotypes ; 3 phenotypes |
| B. | 3 genotypes ; 4 phenotypes |
| C. | 4 genotypes ; 3 phenotypes |
| D. | 4 genotypes ; 4 phenotypes |
| Answer» D. 4 genotypes ; 4 phenotypes | |
| 44. |
Presence of plants arranged into well defined vertical layers depending on their height can be seen best in : |
| A. | Tropical Savannah |
| B. | Tropical Rain Forest |
| C. | Grassland |
| D. | Temperate Forest |
| Answer» C. Grassland | |
| 45. |
A gene whose expression helps to identify transformed cell is known as |
| A. | Selectable marker |
| B. | Vector |
| C. | Plasmid |
| D. | Structural gene |
| Answer» B. Vector | |
| 46. |
The pivot joint between atlas and axis is a type of |
| A. | Fibrous joint |
| B. | Cartilaginous joint |
| C. | Synovial joint |
| D. | Saddle joint |
| Answer» D. Saddle joint | |
| 47. |
If there are 999 bases in an RNA that codes for a protein with 333 amino acids, and the base at position 901 is deleted such that the length of the RNA becomes 998 bases, how many codons will be altered? |
| A. | 1 |
| B. | 11 |
| C. | 33 |
| D. | 333 |
| Answer» D. 333 | |
| 48. |
A disease caused by an autosomal primary non-disjunction is |
| A. | Downs syndrome |
| B. | Klinefelters syndrome |
| C. | Turners syndrome |
| D. | Sickle cell anemia |
| Answer» B. Klinefelters syndrome | |
| 49. |
Which ecosystem has the maximum biomass? |
| A. | Forest ecosystem |
| B. | Grassland ecosystem |
| C. | Pond ecosystem |
| D. | Lake ecosystem |
| Answer» B. Grassland ecosystem | |
| 50. |
Capacitation occurs in |
| A. | Rete testis |
| B. | Epididymis |
| C. | Vas deferens |
| D. | Female Reproductive tract |
| Answer» E. | |