Scientific Method SAC

Question 1

Accuracy

Answer 1

how close it is to the ‘true’ value of the quantity being measured.

Question 2

Precision

Answer 2

how closely a set of measurement values agree with each other

Question 3

Repeatability

Answer 3

a measure of the likelihood that, having produced one result from an experiment, you can try the same experiment, with the same setup, and produce that exact same result.

Question 4

Reproducibility

Answer 4

How much variability in the measurement system is caused by differences between operators

Question 5

True value

Answer 5

the value, or range of values, that would be found if the quantity could be measured perfectly.

Question 6

Validity

Answer 6

a measurement is said to be valid if it measures what it is supposed to be measuring.
An experiment is said to be valid if it investigates what it sets out and/or claims to investigate.

Question 7

Personal errors

Answer 7

mistakes or miscalculations

Question 8

Random errors

Answer 8

affect the precision of a measurement. Random errors are unpredictable variations in the measurement process and result in a spread of readings.

Question 9

Systematic errors

Answer 9

affect the accuracy of a measurement. Systematic errors cause readings to differ from the true value by a consistent amount each time a measurement is made, so that all the readings are shifted in one direction from the true value

Question 10

Uncertainty

Answer 10

the lack of exact knowledge of the value of the quantity being measured.

Question 11

Outliers

Answer 11

Readings that lie a long way from other results. Repeating readings may be useful in further examining an outlier.

Question 12

Factors that impact enzyme function

Answer 12

• temperature
• PH
• enzyme concentration
• substrate concentration
• prescence of competitive inhibitors
• prescence of cofactors
• prescence of non-competitive inhibitors
• product concentration

Question 13

Factors that affect the rate of photosynthesis

Answer 13

• light availability
• water availability
• temperature
• CO2 concentration

Question 14

Factors that affect the rate of cellular respiration

Answer 14

• temperature
• glucose availability
• oxygen concentration

Question 15

Crispr applications to improve crop yields and photosyhthetic efficiencies

Answer 15

• genes coding for rubisco that result in photorespiration can be knocked out by CRISPR-Cas9
• alternative genes that cods for an imporved for of rubisco with superior efficiency of CO2 fixation could be inserter by CRISPR-Cas9