Question Discussion & Solution

The correct answer is Chloroplast.

Key Points

• Photosynthesis:
  • Photosynthesis definition states that the process exclusively takes place in the chloroplasts through photosynthetic pigments such as chlorophyll a, chlorophyll b, carotene, and xanthophyll.
  • All green plants and a few other autotrophic organisms utilize photosynthesis is to synthesize nutrients by using carbon dioxide, water, and sunlight.
  • The by-product of the photosynthesis process is oxygen.
  • Photosynthesis occurs when plants use light energy to convert carbon dioxide and water into glucose and oxygen.
  • Leaves contain microscopic cellular organelles known as chloroplasts.
  • Each chloroplast contains a green-colored pigment called chlorophyll.
  • Light energy is absorbed by chlorophyll molecules whereas carbon dioxide and oxygen enter through the tiny pores of stomata located in the epidermis of leaves.
  • Another by-product of photosynthesis is sugars such as glucose and fructose.
  • These sugars are used by the plants as an energy source, which helps them to grow.
  • Photosynthesis also applies to other organisms besides green plants.
  • These include several prokaryotes such as cyanobacteria, purple bacteria, and green sulfur bacteria.
  • These organisms exhibit photosynthesis just like green plants.
  • The glucose produced during photosynthesis is then used to fuel various cellular activities.
  • The by-product of this physio-chemical process is oxygen.

• Direct memory access (DMA) is a feature of computer systems that allows certain hardware subsystems to access main system memory (RAM), independent of the central processing unit (CPU)
• Disk drive is a hardware subsystem

Hence, option 4 completes the pattern in question figure.

The logic followed is:

The statement talks about the company X which has decided to increase the price of its car by 10%.

conclusion I and conclusion II may or may not follow because we can not tell from the given statement that what other companies will do if company X increases the price of cars.

But other companies can't increase the price and decrease the price of cars at the same time.

They will increase or decrease the price of cars.

Hence the correct answer will be Either I or II follows.

Additional Information

• If there are two or more sentences that are used to frame a statement, then, the sentences must be interrelated, and mutual contradiction should be there.
• Do not look for truthful notions. The information provided in the statement is the only requirement for a student to answer the question. No assumptions must be made.
• Read the statement carefully and look for keywords that are common between the statement and the conclusions
• If there is more than one conclusion that is applicable to the statement, students must ensure that the conclusions they opt for have some relation with each other.

The correct answer is Light Pen.

Key Points 

• Light Pen -
  • It is an input device of the computer which serves to give commands to the computer.
  • It is also called an electronic pen.
  • It looks like an ordinary pen.
  • It is used as a mouse.

Additional Information 

• A wave of light emerges from the tip of this pen.
• With this point, the icon made on the screen is touched and clicked.
• This work is done in the same way that we click by moving the mouse pointer on the screen.
• The tip of the light pen acts in a way like the Enter / Ok button.​