Third calculations quiz: Attempt review PDF

Preview

Summary

Started on Tuesday, 26 November 2019, 11:30 AM State Finished Completed on Tuesday, 26 November 2019, 11:53 AM Time taken 23 mins 4 secs Marks 10/10. Grade 100 out of 100.Question 1CorrectMark 1 out of 1.Question 2CorrectMark 1 out of 1.You need to make 200ml of 49% SDS. How much SDS do you require?...

Description

Started on State Completed on Time taken

Tuesday, 26 November 2019, 11:30 AM Finished Tuesday, 26 November 2019, 11:53 AM 23 mins 4 secs

Marks

10.00/10.00

Grade

100.00 out of 100.00

Question 1 Correct Mark 1.00 out of 1.00

You need to make 200ml of 49% SDS. How much SDS do you require? The m Give your answer in the nearest whole gram

Answer:

!

The molecular weight of SDS is not relevant here. I included it as it is important to kno calculation. [If you were in the lab, you'd need to how to do this (the molecular weight to throw you off...!]. The correct answer is: 98

Question 2 Correct Mark 1.00 out of 1.00

You have made some competent E. coli cells and you want to determine their efficienc plasmid DNA at 1mg/ml. You add 950µl LB broth and incubate for 1h at 37˚C. From t fresh LB. You plate out 57µl of this. After an overnight incubation you count 271 colon competent cells in colony forming units (cfu) per µg? Give you answer to the nearest w

Question 3 Correct Mark 1.00 out of 1.00

The protocol specifies 142 microlitres of 4 M sodium hydroxide should be added to the much should you add? Answer:

!

The correct answer is: 95

Question 4 Correct Mark 1.00 out of 1.00

You are sending a DNA sample for sequencing and you are told to provide 3.1 pmoles/ How much of the stock do you add? Give your answer in µl, to two decimal places. Answer:

!

The correct answer is: 1.03

Question 5 Correct Mark 1.00 out of 1.00

You need to make 400ml of medium with 2% glucose, 0.67% yeast nitrogen each ingredient will you weight out? Select one: a. 80g glucose, 26.8g yeast nitrogen base and 4.52g aminoacid mix

Question 6 Correct Mark 1.00 out of 1.00

VAT is currently 15.2%. I buy a computer for £472. How many pounds of the Give your answer to the nearest pence

Answer:

!

Remember the total price will be the cost of the item with the VAT included. Look it up The correct answer is: 62.28

Question 7 Correct Mark 1.00 out of 1.00

You have a 4X stock of loading dye. Your protein samples are 135 µl in volume. How m of 2X loading dye? Give your answer to the nearest µl.

Answer:

!

The correct answer is: 135

Question 8 Correct Mark 1.00 out of 1.00

Question 9 Correct Mark 1.00 out of 1.00

What is the arithmetic mean of the following data - weights (g) of female m 52, 48, 59, 58, 46, 48, 52, 54.3, 53.3, 53.6 Give your answer to two decimal places

Answer:

!

The correct answer is: 52.42 g

Question 10 Correct Mark 1.00 out of 1.00

In a normal distribution the mode is: Select one: a. the range b. the central value c. the most frequent value

!

d. the average value

The correct answer is: the most frequent value

∠

P R E VI O U S ACT I VI T Y Second calculations quiz...