MCQOPTIONS
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MCQOPTIONS
This section includes 106 Mcqs, each offering curated multiple-choice questions to sharpen your NEET-UG knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
Life cycle of Ectocarpus and Fucus respectively are : |
| A. | Haplontic, Diplontic |
| B. | Diplontic, Haplodiplontic |
| C. | Haplodiplontic, Diplontic |
| D. | Haplodiplontic, Haplontic |
| Answer» D. Haplodiplontic, Haplontic | |
| 52. |
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. | |
| 53. |
Double fertilization is exhibited by : |
| A. | Gymnosperms |
| B. | Algae |
| C. | Fungi |
| D. | Angiosperms |
| Answer» E. | |
| 54. |
Coconut fruit is a : |
| A. | Drupe |
| B. | Berry |
| C. | Nut |
| D. | Capsule |
| Answer» B. Berry | |
| 55. |
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 | |
| 56. |
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 | |
| 57. |
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 | |
| 58. |
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 | |
| 59. |
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. | |
| 60. |
A temporary endocrine gland in the human body is : |
| A. | Pineal gland |
| B. | Corpus cardiacum |
| C. | Corpus luteum |
| D. | Corpus allatum |
| Answer» D. Corpus allatum | |
| 61. |
The association of histone H1 with a nucleosome indicates : |
| A. | Transcription is occurring. |
| B. | DNA replication is occurring |
| C. | The DNA is condensed into a Chromatin Fibre |
| D. | The DNA double helix is exposed |
| Answer» D. The DNA double helix is exposed | |
| 62. |
In Bougainvillea thorns are the modification of : |
| A. | Stipules |
| B. | Adventitious root |
| C. | Stem |
| D. | Leaf |
| Answer» D. Leaf | |
| 63. |
What is the criterion for DNA fragments movement on agarose gel during gel electrophoresis ? |
| A. | The larger the fragment size, the farther it moves |
| B. | The smaller the fragment size, the farther it moves |
| C. | Positive charged fragment moves to farther end |
| D. | Negatively charged fragments do not move |
| Answer» C. Positive charged fragment moves to farther end | |
| 64. |
Select the mismatch |
| A. | Pinus – Dioecious |
| B. | Cycas – Dioecious |
| C. | Salvinia – Heterosporous |
| D. | Equisetum – Homosporous |
| Answer» B. Cycas – Dioecious | |
| 65. |
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 | |
| 66. |
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 of Growth Hormone in adults |
| D. | Muscle fibres do not grow in size after birth |
| Answer» C. Bones loose their sensitivity of Growth Hormone in adults | |
| 67. |
Root hairs develop from the region of : |
| A. | Maturation |
| B. | Elongation |
| C. | Root cap |
| D. | Meristematic activity |
| Answer» B. Elongation | |
| 68. |
An example of colonial alga is : |
| A. | Chlorella |
| B. | Volvox |
| C. | Ulothrix |
| D. | Spirogya |
| Answer» C. Ulothrix | |
| 69. |
The function of copper ions in copper releasing IUD’s is : |
| A. | They suppress sperm motility and fertilizing capacity of sperms |
| B. | They inhibit gametogenesis. |
| C. | They make uterus unsuitable for implantation |
| D. | They inhibit ovulation |
| Answer» B. They inhibit gametogenesis. | |
| 70. |
The final proof for DNA as the genetic material came from the experiments of : |
| A. | Griffith |
| B. | Hershey and Chase |
| C. | Avery, Mcleod and McCarty |
| D. | Hargobind Khorana |
| Answer» C. Avery, Mcleod and McCarty | |
| 71. |
Which ecosystem has the maximum biomass ? |
| A. | Forest ecosystem |
| B. | Grassland ecosystem |
| C. | Pond ecosystem |
| D. | Lake ecosystem |
| Answer» E. | |
| 72. |
Which of the following statements is correct ? |
| A. | The ascending limb of loop of Henle is impermeable to water |
| B. | The descending limb of loop of Henle is impermeable to water. |
| C. | The ascending limb of loop of Henle is permeable to water. |
| D. | The descending limb of loop of Henle is permeable to electrolytes. |
| Answer» B. The descending limb of loop of Henle is impermeable to water. | |
| 73. |
Spliceosomes are not found in cells of : |
| A. | Plants |
| B. | Fungi |
| C. | Animals |
| D. | Bacteria |
| Answer» E. | |
| 74. |
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 | |
| 75. |
The process of separation and purification of expressed protein before marketing is called : |
| A. | Upstream processing |
| B. | Downstream processing |
| C. | Bioprocessing |
| D. | Postproduction processing |
| Answer» C. Bioprocessing | |
| 76. |
Plants which produce characteristic Pneumatophores and show vivipary belong to : |
| A. | Mesophytes |
| B. | Halophytes |
| C. | Psammophytes |
| D. | Hydrophytes |
| Answer» C. Psammophytes | |
| 77. |
During DNA replication, Okazaki fragments are used to elongate : |
| A. | The leading strand towards replication fork |
| B. | The lagging strand towards replication fork |
| C. | The leading strand away from replication fork |
| D. | The lagging strand away from the replication fork |
| Answer» E. | |
| 78. |
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 | |
| 79. |
Select the correct route for the passage of sperms in male frogs |
| A. | Testes → Bidder’s canal → Kidney → Vasa efferentia → Urinogenital duct → Cloaca |
| B. | Testes → Vasa efferentia → Kidney → Seminal Vesicle → Urinogenital duct → Cloaca |
| C. | Testes → Vasa efferentia → Bidder’s canal → Ureter → Cloaca |
| D. | Testes → Vasa efferentia → Kidney → Bidder’s canal → Urinogenital duct → Cloaca |
| Answer» E. | |
| 80. |
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» E. | |
| 81. |
Transplantation of tissues / organs fails often due to non-acceptance by the patient’s body. Which type of immune –response is responsible for such rejections ? |
| A. | Autoimmune response |
| B. | Cell- mediated immune response |
| C. | Hormonal immune response |
| D. | Physiological immune response |
| Answer» C. Hormonal immune response | |
| 82. |
The genotypes of a Husband and Wife are IAIB and IA 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 | |
| 83. |
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 | |
| 84. |
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 | |
| 85. |
A baby boy aged two years is admitted to play school and passes through a dental check-up. The dentist observed that boy had twenty teeth. Which teeth were absent ? |
| A. | Incisors |
| B. | Canines |
| C. | Pre-molars |
| D. | Molars |
| Answer» D. Molars | |
| 86. |
DNA fragments are : |
| A. | Positively charged |
| B. | Negatively charged |
| C. | Neutral |
| D. | Either positively or negatively charged depending on their size |
| Answer» C. Neutral | |
| 87. |
Alexander Von Humbolt described for the first time : |
| A. | Ecological Biodiversity |
| B. | Laws of limiting factor |
| C. | Species are relationship |
| D. | Population Growth equation |
| Answer» D. Population Growth equation | |
| 88. |
Which of the following represents order of ‘Horse’ ? |
| A. | Equidae |
| B. | Perissodactyla |
| C. | Caballus |
| D. | Ferus |
| Answer» C. Caballus | |
| 89. |
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 | |
| 90. |
The hepatic portal vein drains blood to liver from |
| A. | Heart |
| B. | Stomach |
| C. | Kidneys |
| D. | Intestine |
| Answer» E. | |
| 91. |
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 | |
| 92. |
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. | |
| 93. |
Which of the following are found in extreme saline conditions ? |
| A. | Archaebacteria |
| B. | Eubacteria |
| C. | Cyanobacteria |
| D. | Mycobacteria |
| Answer» B. Eubacteria | |
| 94. |
If there are 999 bases in 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 | |
| 95. |
Which of the following cell organelles is responsible for extracting energy from carbohydrates to form ATP ? |
| A. | Lysosome |
| B. | Ribosome |
| C. | Chloroplast |
| D. | Mitochondrion |
| Answer» E. | |
| 96. |
Among the following characters, which one was not considered by Mendel in his experiments on pea ? |
| A. | Stem – Tall of Dwarf |
| B. | Trichomes – Glandular or non-glandular |
| C. | Seed – Green or Yellow |
| D. | Pod – Inflated or Constricted |
| Answer» C. Seed – Green or Yellow | |
| 97. |
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. | |
| 98. |
MALT constitutes about __________percent of the lymphoid tissue in human body. |
| A. | 50% |
| B. | 20% |
| C. | 70% |
| D. | 10% |
| Answer» B. 20% | |
| 99. |
Out of ‘X’ pairs of ribs in humans only ‘Y’ pairs are true ribs. Select the option that correctly represents values of X and Y and provides their explanation : |
| A. | X = 12, Y = 7 : True ribs are attached dorsally to vertebral column and ventrally to the sternum. |
| B. | X = 12, Y = 5 : True ribs are attached dorsally to vertebral column and sternum on the two ends. |
| C. | X = 24, Y = 7 : True ribs are dorsally attached to vertebral column but are free on ventral side. |
| D. | X = 24, Y = 12 : True ribs are dorsally attached to vertebral column but are free on ventral side |
| Answer» B. X = 12, Y = 5 : True ribs are attached dorsally to vertebral column and sternum on the two ends. | |
| 100. |
Asymptote in a logistic growth curve is obtained when : |
| A. | K = N |
| B. | The value of ‘r’ approaches zero |
| C. | K > N |
| D. | K < N |
| Answer» B. The value of ‘r’ approaches zero | |