Tag: diseases caused by changes in lifestyle

Questions Related to diseases caused by changes in lifestyle

Which of the following statements is not true for cancer cells in relation to mutations?

zoology important and common human diseases diseases caused by changes in lifestyle diseases and toxic substance non-infectious diseases

  1. Mjutations in proto-oncogenes accelerate the cell cycle

  2. Metations destroy telomerase inhibitor

  3. Mutations inactive the cell control

  4. Mutations inhibit prdduction of telomerase

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Correct Option: A

Which one is not property of cancer cells 

zoology important and common human diseases diseases caused by changes in lifestyle diseases and toxic substance non-infectious diseases

  1. They show contact inhibition

  2. Divide in uncontrolled manner

  3. Compete with normal cells for vital nutrients

  4. Do not remain confined to area of formation

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Correct Option: A
Explanation:
  • Cancer is a group of diseases involving abnormal cell growth with the potential to invade or spread to other parts of the body. 
  • All cancer cells show the five properties. They are: 
  1. Continuous growth and division. 
  2. Avoidance of programmed cell death. 
  3. Competes with normal cells for vital nutrients.
  4.  Promoting blood vessel construction. 
  5. Invasion of tissue and formation of metastases. Hence, the property which cancer cells does not have is they show contact inhibition.
 So, the correct answer is 'They show contact inhibition'.

Which one of the following techniques is safest for the detection of cancers?

zoology health and diseases diseases caused by changes in lifestyle diseases and toxic substance non-infectious diseases non infectious diseases categories of diseases

  1. Radiography (X-ray)

  2. Computed tomography (CT)

  3. Histopathological studies

  4. Magnetic resonance imaging (MRI)

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Correct Option: A

Proliferation of cancer cells is not limited because of:

zoology important and common human diseases diseases caused by changes in lifestyle diseases and toxic substance non-infectious diseases

  1. Differing surface proteins

  2. Differing cholesterol level

  3. Aberrant chromosomal complement

  4. Both A and C

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Correct Option: D
Explanation:

The difference between normal tissues and cancer tissues is the rate of metabolism.  In normal cells, hundreds of genes intricately control the process of cell division. Normal growth requires a balance between the activity of those genes that promote cell proliferation and those that suppress it. However, in the case of cancer cells, they involve abnormal growth. Cells become cancerous after mutations accumulate in the various genes that control cell proliferation. Hence proliferation of cancer cell is not limited because of differing surface proteins and aberrant chromosomal complements. Thus, the correct answer is option D.

____ and ____ are unicellular algae, rich in proteins, that are used as food supplements even by space travellers. 

botany components of food balanced diet food production and microbes plant breeding for food production effect on general health diseases caused by changes in lifestyle diet, drugs and disease

  1. Chlorella, Spirulina

  2. Gelidium, Gracilaria

  3. Porphyra, Spirogyra

  4. Laminaria, Spirogyra

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Correct Option: A
Explanation:

Chlorella (Green alga), as food supplement is rich in protein and carbohydrates. It yields about 30% proteins, 15% lipids, 30% carbohydrates and 5% ash. Spirulina platensis (blue-green alga) is one of the richest sources of protein and vitamin $B _{2}$. In long range space exploration, scientist have turned to Chlorella and Spirulina to use them as portable oxygen generators and food sources.

The energy and biomass relationship between the organisms at different trophic levels can better expressed by.

evs digestion of food diseases caused by changes in lifestyle nutrition deficiency diseases study of ecological pyramids

  1. Food chain

  2. Food web

  3. Ecological pyramids

  4. Energy cycle

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Correct Option: C
Explanation:
An ecological pyramid (also trophic pyramid, eltonian pyramid, energy pyramid, or sometimes food pyramid) is a graphical representation designed to show the biomass or bio productivity at each trophic level in a given ecosystem. Biomass pyramids show how much biomass (the amount of living or organic matter present in an organism) is present in the organisms at each trophic level, while productivity pyramids show the procreation or turnover in biomass. There is also pyramid of numbers which represent the number of organisms in each trophic level. They may be upright (e.g. Grassland ecosystem), inverted (parasitic ecosystem) or dumbbell shaped (forest ecosystem). Energy pyramids begin with producers on the bottom (such as plants) and proceed through the various trophic levels (such as herbivores that eat plants, then carnivores that eat flesh, then omnivores that eat both plants and flesh, and so on). The highest level is the top of the food chain.
So the correct option is 'ecological pyramid'.

Pyramid of bio mass and number in a pond ecosystem ake-

evs digestion of food diseases caused by changes in lifestyle nutrition deficiency diseases study of ecological pyramids

  1. inverted and upright

  2. inverted and irregular

  3. both upright

  4. both unverted

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Correct Option: A
Explanation:

It is the graphical representation which shows the biomass or bio productivity in an eco system at each tropical level.

Therefore the right answer is option "A, inverted and upright".

The concept of ecological pyramids was proposed by 

evs digestion of food diseases caused by changes in lifestyle nutrition deficiency diseases study of ecological pyramids

  1. Elton

  2. Odum

  3. Darwin

  4. Clement

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Correct Option: A
Explanation:

A (elton) is the correct answer.

Elton proposed the concept of ecological pyramids Ecological pyramid is a graphical representation that shows the biomass at each trophic level. Odum is the father of modern ecology. Clements proposed the theory of plant succession. darwin proposed the theory of biological evolution by natural selection.

When peacock eats snakes which eats insects thriving on green plants, the peacock is

evs digestion of food diseases caused by changes in lifestyle nutrition deficiency diseases study of ecological pyramids

  1. A primary consumer

  2. A primary decomposer

  3. Final decomposer

  4. The apex of food pyramid

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Correct Option: D
Explanation:

In the given food chain peacock is the ultimate consumer. It will be located at the apex of the food pyramid. 

Green plants will be producers. 
Insects feeding on green plants will be herbivores or primary consumers. Snakes will be primary carnivores or secondary consumers and peacock will be a secondary carnivore or a tertiary consumer. Thus, the correct answer is option D.

Mass of living matter at a tropic level in an area at any time is called______________.

evs digestion of food diseases caused by changes in lifestyle nutrition deficiency diseases study of ecological pyramids

  1. Standing state

  2. Standing crop

  3. Detritus

  4. Humus

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Correct Option: B