Producing thousands of copies of a gen:PCR

PCR & CRISPR

• PCR

Polymerase chain reaction (PCR) is a method widely used in molecular biology to make many copies of a specific DNA segment.

This is a very basic video about PCR

https://www.youtube.com/watch?v=DkT6XHWne6E

Answer the following questions:

a) How can humans manipulate the DNA for our own benefit?

b) How can many copies of a gene be made for analysis?

c)  How can this used to detect the COVID-19?

• CRISPR

In this video Paull Andersen tells how the inmune system CRISPR/CAS 9 was identified in bacteria and how this system was used to edit genomes.

https://www.youtube.com/watch?v=MnYppmstxIs

Answer the following question:

a) How can the CRISPR be used against the COVID-19?

INFECTION AND RESPONSE

Pathogens are disease-causing viruses, bacteria, fungi or protists, which can infect animals and plants. 
Humans have an immune system, which can defend them from pathogens.

Wach the following videos
https://www.youtube.com/watch?v=zQGOcOUBi6s
https://www.youtube.com/watch?v=wUm71FPuVCQ


Now try the following test. Good luck!
https://www.bbc.co.uk/bitesize/guides/zcqs2nb/test

UARM Activitysheet Quarantine 3

1. A golf ball rolls up a hill toward a miniature-golf hole. Assign the direction toward the hole as being positive.

• a. If the ball starts with a speed of 4.0 m/s and slows at a constant rate of -0.50 m/s 2 , what is its velocity after 3.0 s?
• b. If the constant acceleration continues for 10.0 s, what will be its velocity then?
• c. Describe the motion of the golf ball during the six seconds.

2. A bus, traveling at 35.0 km/h, speeds up at a constant rate of 3.5 m/s 2 . What velocity does it reach 7.0 s later?

3. If a car accelerates from rest at a constant 5.5 m/s 2 , how long will it need to reach a velocity of 42 m/s?

4. A car slows from 22 m/s to 3.0 m/s at a constant rate of 3.5 m/s 2 . How many seconds are required before the car is traveling at 3.0 m/s?

5. A race car traveling at 44 m/s slows at a constant rate to a velocity of 22 m/s over 11 s. How far does it move during this time?

6. A car accelerates at a constant rate from 12 m/s to 27 m/s while it travels 125 m. How long does it take to achieve this speed?

7. A bike rider accelerates constantly to a velocity of 9.5 m/s during 3.5 s. The bike’s displacement during the acceleration was 22 m. What was the initial velocity of the bike?

8. An airplane starts from rest and accelerates at a constant 4.50 m/s 2 for 35.0 s before leaving the ground.

• a. How far did it move?
• b. How fast was it going when it took off?

9. A brick is dropped from a high scaffold.

• a. What is its velocity after 4.5 s?
• b. How far does the brick fall during this time?

10. A tennis ball is thrown straight up with an initial speed of 20.5 m/s. It is caught at the same distance above ground as it was thrown.

• a. How high does the ball rise?
• b. How long does it take for the ball to reach its maximum height?

SEXUAL VS ASEXUAL REPRODUCTION

Sexual Reproduction Activities

Watch this video about sexual reproduction and then, do the worksheet related to it.

https://www.youtube.com/watch?v=tFZeyFbBLXE

https://docs.google.com/file/d/0Bx3dvd-kesbET3JpMGw3d1lOWEk/edit

Asexual Reproduction Activities

Watch this video and do the worksheet related to it.

https://www.youtube.com/watch?v=jk2RJm5RBEk
https://docs.google.com/file/d/0Bx3dvd-kesbEazdualBQWjh3c00/edit

F&Q UARM PROBLEMS WORKSHEET QUARANTINE WEEK 2

WORKSHEET QUARANTINE WEEK 2

UARM PROBLEMS

1. With an initial velocity of 20 km/h, a car accelerated at 8 m/s² for 10 seconds.
   a) What is the position of the car at the end of the 10 seconds?
   b) What is the velocity of the car at the end of the 10 seconds?
2. An object is thrown straight down from the top of a building at a speed of 20 m/s. It hits the ground with a speed of 40 m/s.
   a) How high is the building?
   b) How long was the object in the air?
3. A train brakes from 40 m/s to a stop over a distance of 100 m.
   a) What is the acceleration of the train?
   b) How much time does it take the train to stop?
4. A boy on a bicycle increases his velocity from 5 m/s to 20 m/s in 10 seconds.
   a) What is the acceleration of the bicycle?
   b) What distance was covered by the bicycle during the 10 seconds?
5. From rest, a car accelerated at 8 m/s² for 10 seconds.
   a) What is the position of the car at the end of the 10 seconds?
   b) What is the velocity of the car at the end of the 10 seconds?

F&Q FREE FALL PROBLEMS WORKSHEET QUARANTINE WEEK 2

WORKSHEET QUARANTINE WEEK 2

FREE FALL PROBLEMS

Instructions: Read each question carefully. Choose the answer that best fits the question. Short answer response questions must be responded to in complete sentences. If the question involves calculations, you must show all your math work.

1. Free fall is an idealized situation in which air friction is ignored, and objects accelerate at a constant downward 9.8m/s2. If you throw your graduation cap upward, the cap is in free fall the moment it leaves your hand, even though it is moving in an upwards direction.

1. True
2. False

2. From how high up do you have to drop a marble for it to hit the ground in exactly 1 s?
   1. 5.1m
   2. 9.8m
   3. 4.9m
   4. 3.6m
3. A quarter is flipped up in the air at the start of a football game and returns to the point from which it was flipped after 2.5s. What would be the quarter’s original speed, presuming that the acceleration of the quarter is 9.8m/s² downward?
   1. 4.9 m/s
   2. 25 m/s
   3. 12.25 m/s
   4. 49 m/s
4. An outfielder is practicing catching pop-up fly balls. He throws the baseball straight up with a velocity of +15 m/s. At what height will it reach its peak, if it falls back to his mitt, at the same height he released the ball, in 3 s?

1. 45 m
2. 22.5 m
3. 11.5 m
4. 10 m

4. The distance traveled by a freely-falling body is proportional to

1. the mass of the body.
2. the square of the acceleration due to gravity.
3. the square of the time of fall.
4. the time of fall

F&Q UARM EXPLANATIONS

HOW TO SOLVE URM PROBLEMS

THE HUMAN EAR

THE HUMAN EYE

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