General Science - Biology MCQs
71. Which of the following can be used for DNA Fingerprinting technology?
- Teeth
- Saliva
- Red blood cells (RBCs)
- White blood cells (WBCs)
Select the correct option from codes given below:
[A] 1, 3 & 4 Only
[B] 2, 3 & 4 Only
[C] 1, 2 & 3 Only
[D] 1, 2 & 4 Only
Show Answer
Correct Answer: D [1, 2 & 4 Only]
Notes:
Blood, bones, hair with root, saliva, semen, teeth, and tissue can be used to study the DNA. The red blood cells (RBCs) contain haemoglobin and carry oxygen throughout the body, but it is true that they lack the DNA-containing nuclei found in all other cells. Unlike RBCs, white blood cells do contain nuclei and the informative molecule inside, DNA.
72. Which among the following species of Anopheles Mosquitoes generally breeds in man-made water containers in urban areas?
[A] Anopheles culicifacies
[B] Anopheles minimus
[C] Anopheles fluviatilis
[D] Anopheles stephensi
Show Answer
Correct Answer: D [Anopheles stephensi]
Notes:
Correct answer is Anopheles stephensi. Further note that Anopheles culicifacies is found in rural areas all over India. An.minimus and An.fluviatilis breed in running channels, streams with clean water.
73. The study of Improvement of human race by improving environment is known as ?
[A] Euthenics
[B] Eugenics
[C] Euphenics
[D] Etiology
Show Answer
Correct Answer: A [Euthenics]
Notes:
- Euthenics is the branch of biology that studies the improvement of human race by improving environment.
Thus Option [A] is correct.
- Eugenics is the branch of biology that studies the Improvement of human race through laws of heredity.
- Euphenics is the branch of biology that studies the improvement of human race by drug treatment or genetic engineering.
- Etiology is the branch of biology that studies the Life cycle of causal organisms of the disease.
74. Which instrument is used to detect ulcers in stomach?
[A] Endoscope
[B] Cystoscope
[C] Ureteroscope
[D] Cardiograph
Show Answer
Correct Answer: A [Endoscope]
Notes:
An endoscopy is used in medicine to look for the ulcers in the stomach. The endoscopy procedure uses an endoscope to examine the interior of a hollow organ or cavity of the body. Unlike many other medical imaging techniques, endoscopes are inserted directly into the organ.
75. Who coined the term “Tissue culture”?
[A] Montrose Thomas Burrows
[B] Jack Kevorkian
[C] Charles Scott Sherrington
[D] Ludvig Hektoen
Show Answer
Correct Answer: A [Montrose Thomas Burrows]
Notes:
Tissue culture is the growth of tissues or cells in an artificial medium separate from the organism. It refers to the culture of animal cells and tissues, with the more specific term plant tissue culture being used for plants. The term “tissue culture” was coined by American pathologist Montrose Thomas Burrows.
76. What is epidermis made of?
[A] Dermatogen
[B] Periblem
[C] Protoderm
[D] Plerome
Show Answer
Correct Answer: A [Dermatogen]
Notes:
Dermatogen is the outer primary meristem of a plant or plant part that according to the histogen theory gives rise to epidermis, which is the outermost layer of the skin. Epidermis provides barrier to infection from environmental pathogens.
77. How Many Vertebrae does a human being have?
Show Answer
Correct Answer: C [33]
Notes:
The human vertebral column comprises 33 vertebrae that collectively protect the spinal cord and support the entire skeletal framework of the body. The human spinal column is made up of 33 bones – 7 vertebrae in the cervical region, 12 in the thoracic region, 5 in the lumbar region, 5 in the sacral region and 4 in the coccygeal region.
78. Which of the following terms denotes the transpiration through leaves?
[A] Cauline transpiration
[B] Foliar transpiration
[C] Cuticular transpiration
[D] Lenticular transpiration
Show Answer
Correct Answer: B [Foliar transpiration]
Notes:
the transpiration which takes place through the leaves is called foliar transpiration. The foliar transpiration may be stomata’ transpiration or cuticular transpiration.
79. Who among the following analysed the DNA for the first time ?
[A] Watson and Krick
[B] Karl von Frisch
[C] M. W. Nirenberg
[D] Hargobind Khurana
Show Answer
Correct Answer: A [Watson and Krick]
Notes:
The discovery in 1953 of the double helix, the twisted-ladder structure of deoxyribonucleic acid (DNA), by James Watson and Francis Crick marked a milestone in the history of science and gave rise to modern molecular biology, which is largely concerned with understanding how genes control the chemical processes.
80. Which of the following fruits has its seed outside?
[A] Mango
[B] Banana
[C] Strawberry
[D] Orange
Show Answer
Correct Answer: C [Strawberry]
Notes:
Strawberry is the fruit which has its seeds outside the body. The “seeds” on the outside of a strawberry are actually the plant’s ovaries and are called “achenes.” Each “seed” is technically a separate fruit that has a seed inside of it.
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