Midcourse test pt 1 Flashcards
q1 What is the magnification of the plant cell? I =50mm
2.0x10^3
what bonds hold quaternary protein structure together? 2
hydrogen bonds and disulphide bonds
What relationships could be investigated with a colorimeter? 2
The effect of high intensity on the rate at which a solution of light sensitive dye changes from green to colourless
The effect of temperature on the rate of breakdown of cell membranes in tissues with pigmented cells, such as beetroot
Q4 read context, which statement correctly explains a response to ethanol that could account for the increase in tolerance of yeast cell membranes to ethanol?
Increasing the proportion of palmitoleic acid (a C16 unsaturated fatty acid) to oleic acid (a C18 unsaturated fatty acid) in the phospholipids of the bilayer increases fluidity of the cell membrane
Q5 read context, what will happen in the second investigation after 5 minutes?
Water molecules will enter and leave the cell in equal amounts both at an initial rate that is less than R in the first investigation
What does adenine pair with in DNA?
Thymine
What does adenine pair with in RNA?
Uracil
What does Guanine pair with?
Cytosine
What bases are pyrimidines?
Uracil, thymine, and cytosine
What bases are purines?
Adenine and guanine
What type of bases are the DNA and RNA bases?
Nitrogenous
Which bases have two rings in their structure?
adenine and guanine
which bases have one ring in their structure?
Uracil, thymine and cytosine
Q6 which statements about this nucleotide are correct? (can actually look at multiple choice)
1,2 and 3
Q7 which description if the cross section of F correctly states what the students could actually see?
circular
A student used Benedict’s solution to test a sample known to contain carbohydrate. At the end of the test, the solution was blue. Which carbohydrate could be present?
sucrose
Q9 what sugar could be represented by the linear structure?
glucose
Q10 which row describes protein structure?
C
Draw the general structure of an amino acid
See Q 11 a
Q11 b) calculate the rate of reaction when the standard brown colour was reached in 2 minutes 30 seconds
0.4
Q11 b) ii) ( look at graph & read Q 11 b context on prev pg) state how the results shown in fig 11.3 show that the substrate was in excess at all concentrations of catechol oxidase tested
the line continues rising with each concentration and doesn’t reach a plateau
