Spm Biology

Only available on StudyMode
  • Topic: Hypothesis, Enzyme, Starch
  • Pages : 5 (1244 words )
  • Download(s) : 1222
  • Published : June 29, 2011
Open Document
Text Preview
SPM Biology – Answering Techniques in Paper 3
SPM Biology candidates typically commit the mistake of thinking that the length of their answered essay or structured questions equates to marks deserve, under the formula, Length of Structure Answer/Essay = Marks. This is wrong and Berry Berry Easy wishes to clear the air regarding this issue. It is never about how long you write but more about how accurate you write. So for Berry Readers who can write long answers but never seemed to score well, do check out the post below. Share this with your other friends who have the same problem as you. The SPM question Paper 3 – (Answer all questions – Question 1 and 2 only) consist of 50 marks in total. In this paper, students need to answer all questions. Question 1 consists of 33 marks and Question 2 consists of 17 marks. There are some important points that will be discussed using the trial SPM 2010 Johor state paper 3. The marks for each question range from 0 (wrong response), 1 (idea level response), 2 (inaccurate response) to 3 (accurate response) marks for each questions. Paper 3 Biology involves with very detailed criteria of marking. 1) How to state the observation?

Usually it involves two criteria.
Example 1
State two different observations made from Table 1. (Nyatakan dua pemerhatian yang berbeza yang dibuat daripada Jadual 1). Q1 (b) (i) (3 marks). Idea level response (1 mark):
* The time taken is different for each temperature.
* Temperature influences time taken for iodine solution remains yellowish. No full marks will be given if students did not meet the 2 criteria of answer and the word ‘different’ / ‘influence’ is not specific. Students must try to avoid these words. Accurate response (3 marks):

P1: Temperature of water bath
P2: Time taken for iodine solution to remain yellowish
(Horizontal observation)
* At temperature 5˚C, time taken for iodine solution remains yellowish is 12 minutes. * At temperature 37˚C, time taken for iodine solution remains yellowish is 3 minutes. * At temperature 55˚C, time taken for iodine solution remains yellowish is 15 minutes. (Vertical observation)

* Time taken for iodine solution remain yellowish for temperature 37˚C is faster than 5˚C / 28˚C / 45˚C / 55˚C // Vice versa 2) How to state inference in Paper 3 Biology?
Similar to observation, inference involves 2 criteria.
Example 2
State the inference which corresponds to the observations in 1 (b) (i). (Nyatakan inferens yang sepadan dengan pemerhatian di 1 (b) (i)). Q1 (b) (ii) Idea level response (1 mark):
* Temperature influences the enzyme reaction.
Accurate response (3 marks):
P1: Rate of enzyme reaction
P2: Low / High (Reject: Lowest / Highest)
(Horizontal inference)
* At temperature 5˚C, the rate of enzyme (amylase) reaction is low / decreases / longer / lower. * At temperature 37˚C / optimum temperature, the rate of enzyme reaction is high. * At temperature 55˚C, the rate of enzyme reaction is low. (Vertical inference)

* At temperature 37˚C, the rate of enzyme reaction is higher than the rate of enzyme reaction at 5˚C / 28˚C / 45˚C / 55˚C // vice versa. 3) How to get full marks in hypothesis for an experiment?

Similar to the hypothesis in Chemistry Paper 3, it must always start with manipulated variable and follows by responding variables. Example 3
State the hypothesis for this experiment. (Nyatakan hipotesis bagi eksperimen ini.) Q1 (d) Idea level response (1 mark):
* The temperatures influence the enzyme reaction.
Accurate response (3 marks):
P1: Manipulated variable (temperature)
P2: Responding variable (time taken for iodine solution remain yellowish / rate of enzyme (amylase) reaction / activity) Hypothesis: relationship of P1 and P2 (MV + RV)
* The higher the temperature, the higher the rate of enzyme reaction / time taken for iodine solution remain yellowish (until it reaches the optimum temperature) * When the temperature increases, the rate of enzyme...
tracking img