Friday 24 May 2019 - Morning AS Level
Biology A H020/02 Depth in biology
QUESTIONS AND ANSWERS
1. An research turned into done into the loss of water from a leafy shoot. The apparatus
used is proven in Fig. 4.1 - ANSWER-transpiration is identical to water uptake
2. Cells A, C and D work collectively to carry out an critical feature. State the function that
cells A, C and D carry out - ANSWER-immunity
3. Fig. 2, on the insert, is a photomicrograph of a mammalian blood smear. (a) Calculate
the image duration, in µm, represented with the aid of the scale bar. Give your answer to
2 big figures - ANSWER-14 or 15 or 16 ÷ 1250 x one thousand= 12
4. discover an anomalous studying inside the statistics and compare the extent to which it
has affected the mean that has been calculated - ANSWER-57
Has elevated the mean in trial 4 situation 3
(ignoring / apart from 57) imply = 29.4
5. Name the cell labelled B - ANSWER-erythrocyte
6. Phloem tissue is made up of different cell types. Identify the type of phloem mobile into
which the stylet is inserted to achieve the sap - ANSWER-sieve tube element
7. Separate samples of the sap have been tested for the presence of glucose, starch and
sucrose. Using Table 1, complete the following passage, the usage of the maximum
appropriate phrases
In order to check for the presence of glucose, ................................. .................................
Become brought to the sap sample and boiled. The final shade become
....................................... And so it become viable to arrive at the conclusion proven in
Table 1. When iodine solution was introduced to the sap pattern, the very last color was
................................................... . To take a look at for the presence of sucrose, the
sample become first boiled with ................................................... . After the relaxation of
the take a look at were completed, the colour of the mixture indicated that sucrose
became gift within the pattern - ANSWER-1. Benedicts solution
2. Blue
three. Brown
4. Acid
8. Sucrose is carried in phloem sap from source to sink. (i) Explain why starch isn't
transported in the sap - ANSWER-Because it isn't soluble
9. Suggest a purpose for the analyzing that you diagnosed as anomalous in -
ANSWER-misinterpret, scale / ruler / distance
bubble changed into no longer (fully) lower back to beginning role
10.Suggest why sucrose is a greater suitable shipping molecule than glucose -
ANSWER-much less probably to, leave / exit / diffuse out of (sieve tubes
Biology A H020/02 Depth in biology
QUESTIONS AND ANSWERS
1. An research turned into done into the loss of water from a leafy shoot. The apparatus
used is proven in Fig. 4.1 - ANSWER-transpiration is identical to water uptake
2. Cells A, C and D work collectively to carry out an critical feature. State the function that
cells A, C and D carry out - ANSWER-immunity
3. Fig. 2, on the insert, is a photomicrograph of a mammalian blood smear. (a) Calculate
the image duration, in µm, represented with the aid of the scale bar. Give your answer to
2 big figures - ANSWER-14 or 15 or 16 ÷ 1250 x one thousand= 12
4. discover an anomalous studying inside the statistics and compare the extent to which it
has affected the mean that has been calculated - ANSWER-57
Has elevated the mean in trial 4 situation 3
(ignoring / apart from 57) imply = 29.4
5. Name the cell labelled B - ANSWER-erythrocyte
6. Phloem tissue is made up of different cell types. Identify the type of phloem mobile into
which the stylet is inserted to achieve the sap - ANSWER-sieve tube element
7. Separate samples of the sap have been tested for the presence of glucose, starch and
sucrose. Using Table 1, complete the following passage, the usage of the maximum
appropriate phrases
In order to check for the presence of glucose, ................................. .................................
Become brought to the sap sample and boiled. The final shade become
....................................... And so it become viable to arrive at the conclusion proven in
Table 1. When iodine solution was introduced to the sap pattern, the very last color was
................................................... . To take a look at for the presence of sucrose, the
sample become first boiled with ................................................... . After the relaxation of
the take a look at were completed, the colour of the mixture indicated that sucrose
became gift within the pattern - ANSWER-1. Benedicts solution
2. Blue
three. Brown
4. Acid
8. Sucrose is carried in phloem sap from source to sink. (i) Explain why starch isn't
transported in the sap - ANSWER-Because it isn't soluble
9. Suggest a purpose for the analyzing that you diagnosed as anomalous in -
ANSWER-misinterpret, scale / ruler / distance
bubble changed into no longer (fully) lower back to beginning role
10.Suggest why sucrose is a greater suitable shipping molecule than glucose -
ANSWER-much less probably to, leave / exit / diffuse out of (sieve tubes
