Where are proteins synthesised inside the cell?
2. What is Osmosis?
3. Name two organelles which contain their own genetic material.
4. SI unit of temperature is .
5. Define boiling point.
6. Humidity increases the rate of Evaporation .
7. what is the unit of acceleration, velocity & speed
8. Define uniform and non uniform motion
[B]. Short questions (2 marks each)
1. Which organelle is known as the power house of the cell? Why?
2. Give reason why we can get smell of perfume sitting several meters away.
3.write the difference between
a. Average speed and average velocity
b. Distance and displacement
[C] Long questions. (3 marks each) Any 2
1. Write three differences between Prokaryotic and Eukaryotic cell.
2. State the two properties of solid, liquid, gas.
3. Ram swims in a 200 m long pool. She covers 600 m in 6 minute by swimming
from one end to the other and back along the same straight path. Find the average.
speed and average velocity of Ram.
[D]. Answer any one. (5 marks) Any 1
1. (i) Why is the plasma membrane called a selectively permeable membrane?
(ii) Define: (a) Hypotonic solution (b) Hypertonic solution (c) Isotonic
solution.
OR
2. a. Explain the general equation of motion
b. Plot the graph for V-T graph in any 4 appropriate conditions
Answers
Hope this will help you.
Answers: 1:Ribosomes are the sites in a cell in which protein synthesis takes place.
2:People also ask
What is osmosis short answer?
In biology, osmosis is the movement of water molecules from a solution with a high concentration of water molecules to a solution with a lower concentration of water molecules, through a cell's partially permeable membrane.
3:The two organelles containing their own genetic material are mitochondria and plastids.
4:The kelvin is the SI unit of thermodynamic temperature, and one of the seven SI base units. Unusually in the SI, we also define another unit of temperature, called the degree Celsius (°C). Temperature in degrees Celsius is obtained by subtracting 273.15 from the numerical value of the temperature expressed in kelvin.
5:80.7K+ Views. Hint: The temperature at which conversion of liquid on heating takes place at standard atmospheric pressure is called the boiling point of that liquid and the phenomenon is called boiling.
6:Humidity, or water vapor content of the air, also has an effect on evaporation. The lower the relative humidity, the drier the air, and the higher the evaporation rate. The more humid the air, the closer the air is to saturation, and less evaporation can occur.
7:Because acceleration is velocity in m/s divided by time in s, the SI units for acceleration are m/s2, meters per second squared or meters per second per second, which literally means by how many meters per second the velocity changes every second.
8:When a body covers equal distances in a straight line, equal intervals of time are called uniform motion. Example: a car moving at 20km/h in a straight line. When a body covers unequal distance in equal intervals of time in a straight line is called non-uniform Example : spinning wheel.
(B) :
1:Mitochondria are tiny organelles inside cells that are involved in releasing energy from food. This process is known as cellular respiration. It is for this reason that mitochondria are often referred to as the powerhouses of the cell.
2:Molecules with higher kinetic energy diffuses quicker. That is the reason we can smell the perfume sitting several meters away. ... Gaseous particles tend to undergo diffusion because they have kinetic energy.
3: Average speed is the total distance traveled divided by the time. Speed takes into account the total path length traveled. Average velocity is the displacement divided by the time. Velocity only takes into account the starting and ending points of an object's pth.