General Science - Online Test
Q1. Cultivation of hybrids has increased productivity although it is not used extensively
Answer : Option D
Explaination / Solution:
Hybrid seeds are produced to increase the productivity, resistivity and nutritional value of seed and fruit. It is not used extensively as hybrid seeds have to be produced every year so it becomes costly to farmers.
Q2. Anvils made of single crystals of diamond, with the shape as shown in Figure, are used to investigate behaviour of materials under very high pressures. Flat faces at the narrow end of the anvil have a diameter of 0.50 mm, and the wide ends are subjected to a compression force of 50,000 N. What is the pressure at the tip of the anvil?
Answer : Option C
Explaination / Solution:
No Explaination.
Q3. Temperature is an environmental factor that does not affect
Answer : Option C
Explaination / Solution:
Temperature is an environmental factor that influence the type and number of species in a given habitat. Temperature may change the enzyme kinetics, physiology and geographical distribution of species. Photoperiod is the duration of light that fall on plant and not affected by temperature.
Q4. In legumes, rhizobium bacteria are found in
Answer : Option D
Explaination / Solution:
Nitrogen-fixing bacteria, especially roots of legumes, can fix this atmospheric nitrogen into biologically usable forms.
Q5. The reflex action of vomiting is controlled by
Answer : Option A
Explaination / Solution:
Vomiting is believed to be controlled by two distinct brain centres—the vomiting centre and the chemoreceptor trigger zone—both located in the medulla oblongata.
The vomiting centre initiates and controls the act of emesis, which involves a series of contractions of the smooth muscles lining the digestive tract.
Q6. Which crystal system has axial angles equal to ?
Answer : Option C
Explaination / Solution:
Orthorhombic crystal system has axial angles
Q7. Nylon – 2 – Nylon – 6 is
Answer : Option B
Explaination / Solution:
Nylon -2-nylon-6 is polyamide copolymer.
Q8. Which of the following organism produce gemmules as asexual reproductive structure?
Answer : Option B
Explaination / Solution:
Gemmules are asexual reproductive structure produced by sponges. Chlamydomonas produce zoospores, hydra produce buds and Penicillium produces conidia.
Q9. A plano-convex lens is made of glass of refractive index 1.5.The focal length ƒ of the lens and radius of curvature R of its curved face are related as
Answer : Option A
Explaination / Solution:
No Explaination.
Q10. Protein secreted by virus infected cells is called
Answer : Option B
Explaination / Solution:
Interferons (IFNs) are a group of signaling proteins made and released by host and infected cells in response to the presence of several pathogens, such as viruses, bacteria, parasites, and also tumor cells. which protect non- cancerous cells from infection.
