Biology (Part-III) (Railway)

Total Questions: 50

31. The zoological name of the common housefly is: [RRB NTPC CBT-1 Exam, 07.01.2021 (Shift-II)]

Correct Answer: (4) Musca Domestica
Solution:The scientific name of the housefly is Musca domestica.

• Houseflies belong to the order Diptera and genus Musca.

32. The smallest unit of the life capable of independent existence is: [RRB NTPC CBT-1 Exam, 07.01.2021 (Shift-II)]

Correct Answer: (4) cell
Solution:The cell is the smallest structural and functional unit of living organisms, which can exist on its own.

• Robert Hooke coined the term "cell" (from the Latin cella, meaning "small room") for the box-like structures he observed when viewing cork tissue through a lens.

The word 'Cell' first introduced by Robbeor Hooke.

33. Which is the longest bone in the human body? [RRB NTPC CBT-1 Exam, 21.01.2021 (Shift-II)]

Correct Answer: (4) Femur
Solution:The femur is the longest bone found in the human body.

• It is almost 19.9 inches long and is commonly known as the thigh bone.

• One can evaluate that femur is the longest bone just by looking at his/her thigh.

• It runs from the hip down to around the knee area.

34. Which disease is caused by the deficiency of protein in our body? [RRB NTPC CBT-1 Exam, 21.01.2021 (Shift-II)]

Correct Answer: (1) Kwashiorkor
Solution:The main cause of kwashiorkor is not eating adeqate protein or other essential vitamins and minerals.

• It's most common in developing countries with a limited food supply, poor hygiene. and a lack of education about the importance of giving babies and children an adequate diet.

35. Which part of the human body is formed by the fusing of the illium, ischium and the pubis? [RRB NTPC CBT-1 Exam, 22.01.2021 (Shift-I)]

Correct Answer: (2) Hip bone
Solution:Hip bone is formed by the fusion of three bones; ilium on upper side, pubis on inner side and ischium below the pubis.

36. Cyclone-30, a particle accelerator is used in medical application. It will help patients suffering from___________. [RRB NTPC CBT-1 Exam, 22.01.2021 (Shift-I)]

Correct Answer: (2) Cancer
Solution:India's biggest cyclotron facility that will produce radioisotopes vital for diagnosis and treatment of cancer is named Cyclone 30.

• It is housed at the Kolkata-based Variable Energy Cyclotron Centre (VECC) under the Department of Atomic Energy (DAE)

• It will be first and only cyclotron facility in country to produce Germanium 68 radioisotopes, which is used in diagnosts of breast cancer.

37. When respiration takes place even in the absence of oxygen, it is called ____________ respiration. [RRB NTPC CBT-1 Exam, 23.01.2021 (Shift-I)]

Correct Answer: (2) anaerobic
Solution:When breakdown of glucose occurs with the use of oxygen it is called aerobic respiration.

• Anaerobic means "without air". Therefore, this type of cellular respiration does not use oxygen to produce energy.

38. Parenchyma and collenchyma are the types of _________tissues. [RRB NTPC CBT-1 Exam, 23.01.2021 (Shift-I)]

Correct Answer: (3) simple permanent
Solution:Permanent tissues are made of meristematic cells. that has definite form and shape and have lost the power to divide and differentiate and are of three types; simple, complex and special.

• The simple tissues are parenchyma, sclerenchyma and collenchyma.

• Parenchyma makes a major part of ground tissues in plants, where other tissues like vascular tissues are embedded.

39. A baby receives its nutrition in the mother's womb through the_____________. [RRB NTPC CBT-1 Exam, 25.01.2021 (Shift-I)]

Correct Answer: (3) placenta
Solution:The placenta is the organ that develops and implants in the mother's womb (uterus) during pregnancy.

• Oxygen and nutrients from the mother's blood are transferred across the placenta to the fetus through the umbilical cord. This enriched blood flows through the umbilical vein toward the baby's liver.

40. Which part of the muscular system attaches bone to bone? [RRB NTPC CBT-1 Exam, 25.01.2021 (Shift-I)]

Correct Answer: (4) Ligament
Solution:Ligaments are structures which connect bone to bone.

• They are made up of bundles of elastic fibres and few collagen fibres.