11. Late Hargobind Khorana had received Nobel Prize in physiology in 1968, for work on which among the following?
[A] Mechanisms of the action of hormones
[B] Chemical Structure of antibodies
[C] Interpretation of the genetic code
[D] Structural and functional organization of the cell
Show Answer
Correct Answer: C [Interpretation of the genetic code]
Notes:
Late Hargobind Khorana had received Nobel Prize in physiology in 1968, for work on interpretation of the genetic code. Har Gobind Khorana was an Indian American biochemist.
12. The Science of using mechanical devices with human muscle skeleton and nervous systems to assist or enhance motor control lost by trauma, disease or defect is called:
[A] Gerontechnology
[B] Biomechatronics
[C] Orthotics
[D] Bionics
Show Answer
Correct Answer: B [Biomechatronics]
Notes:
Biomechatronics is an applied interdisciplinary science that aims to integrate mechanical elements, electronics and parts of biological organisms. Biomechatronics includes the aspects of biology, mechanics, and electronics. It also encompasses the fields of robotics and neuroscience. The goal of this science is to make devices that interact with human muscle, skeleton, and nervous systems. The end result is that the devices will help with human motor control that was lost or impaired by trauma, disease or birth defects.
13. What is the primary role of lipids in the body?
[A] provide energy for muscles and body processes
[B] maintain normal blood volume and normal water content in interstitial fluid
[C] extract waste from blood, balance body fluids, form urine
[D] produce certain proteins for blood plasma
Show Answer
Correct Answer: A [ provide energy for muscles and body processes]
Notes:
The primary role of lipids in the body is to provide energy for muscles and body processes.
14. In human body, where do you find the Cone cells and Rod cells?
[A] Retina of the eye
[B] Gallbladder
[C] Esophagus
[D] Villi in the small intestine
Show Answer
Correct Answer: A [ Retina of the eye]
Notes:
Cone cells and Cone cells are one of three types of photoreceptor cells in the retina of the eye. They are responsible for color vision and function best in relatively bright light, as opposed to rod cells, which work better in dim light.
15. Which of the following two vegetables are in same Genus Solanum?
[A] Potato and Brinjal
[B] Potato and Cauliflower
[C] Brinjal and Chilli
[D] Tomato and Radish
Show Answer
Correct Answer: A [Potato and Brinjal]
Notes:
Potato and Brinjal have several common features and are thus included in the same genus Solanum. The scientific name of Potato is Solanum tuberosum and Brinjal is Solanum melongena.
16. Which movements of “Touch me not plant” lead to closing of its leaves when touched?
[A] Nyctinastic movements
[B] Seismonastic movements
[C] Chemonastric movements
[D] Photonastic movements
Show Answer
Correct Answer: B [Seismonastic movements]
Notes:
Seismonastic Movement is caused by the mechanical stimuli like shock, touch, fast moving wind, etc. Mimosa pudica is a perennial herb which is also known as the touch me not plant or the sensitive plant, is well-known for closing its leaves (or folding its leaves inwards) when touched.
17. Which of the following is the hybrid between a horse and a donkey?
[A] Mule
[B] Hule
[C] Tigon
[D] Zorse
Show Answer
Correct Answer: A [Mule]
Notes:
A mule is the offspring of a male donkey (a jack) and a female horse (a mare). A horse has 64 chromosomes, and a donkey has 62. The mule ends up with 63. Mules can be either male or female, but, because of the odd number of chromosomes, they can’t reproduce
18. Conception generally takes place at which of the following times?
[A] Menses
[B] Before menses
[C] Immediately after menses
[D] Two weeks after menses
Show Answer
Correct Answer: D [Two weeks after menses]
Notes:
The egg can be fertilized for 12 to 24 hours after it’s released as it travels down the fallopian tube toward the uterus. If an egg meets up with a sperm cell that has made its way into the fallopian tube, it combines into one cell, a process that’s known as fertilization or conception. It happens two weeks after menses.
19. Which one of the following vitamins is considered to be a hormone? (UPSC Prelims 1994)
[A] A
[B] B
[C] C
[D] D
Show Answer
Correct Answer: D [D]
Notes:
Vitamin D is a hormone the kidneys produce that controls blood calcium concentration and impacts the immune system. It is also known as calcitriol, ergocalciferol, calcidiol and cholecalciferol.
20. Which branch of biology is known for the study of developmental process of organisms?
[A] Genetics
[B] Evolution
[C] Histology
[D] Heredity
Show Answer
Correct Answer: B [Evolution]
Notes:
In branch of biology, the study of developmental process of organisms is known as Evolution. The theory of evolution is based on the idea that all species are related and change slowly over time. Charles Darwin’s theory of evolution states that evolution occurs by natural selection.
