Model exam – 2 (experimental exam – may 2021)

•In an experiment to illustrate the relation between the amount of water absorbed by the plant from the soil and the lost amount during transpiration process in different times of the day, the results were as shown in the following table: Explain the reason for the changes occurred during the experiment,…….

•The opposite graph shows the results of a study done by one of the scientists for the effect of increasing the concentration of auxins on plant cells. Which of the following could be concluded from studying this graph?

•Study the opposite twofigures, then answer:

•What is the difference indivision between the two figures (1) and (2) ?

•The two opposite figures represent a plant cell before and after infection, study them, then deduce:

•What is (are) the immune substance(s) that are formed inside the cell?

•The opposite table shows the response of 4 endocrine glands to the pituitary gland hormones in the human body what do you expect the gland no.(3) to be ?

•The opposite figure shows planaria worm which was cut into 8 parts, then they were placed in salt water what is the expected number of planaria worms that produced by regeneration?

•In one of the experiments on the oat plant, the plants were divided into 3 groups as shown in the figure: The first group: the growing tip was separated from the plant by a metal plate The second group: the growing tip was separated from the plant by a gelatinous substance The third group: the growing tip was separated from the plant then reconnected directly after a few days, it was noticed that the plants of the first group stopped growing, while thegrowth of the second andthird groups continue:what is the explanation ofthese results?

•Study the two opposite figures, then deduce, when is substance (X) ?

•Study the opposite table, which shows the amount of energy (ATP) that is required for the normal contraction of 4 different muscles, what is the muscle which contains the largest amount of motor units?

•Study the opposite diagram which shows the whorls of a full-ripen flower arranged from outside to inside, then deduce, what is the reason that proves the occurrence of self-pollination

•From the two opposite figures:

•What is the type of immunecells in each of (1) and (2) respectively ?

•The following figure shows a filament of spirogyra alga isolated from a dry lake :

•What is the form ofreproductions in thisfilament?

•The opposite figure shows a structure in the immune system, what is the figure that describes regions (A) and (B)?

•What is the time taken by malaria plasmodium to make the symptoms appears repeatedly 5 successive times on the infected person ?

•In the aerobic respiration of skeletal muscle the amount of energy produced from hydrolysis of one glucose molecule equals 38 ATP molecules, while in anaerobic  respiration one glucose molecules produces 2 ATP molecules, where two molecules of lactic acid were produced. The opposite graph shows the amount of ATP and lactic acid that are produced during the activity of skeletal muscle. What is the ratio between the amount of glucose consumed by the muscle during its normal activity compared to the consumed amount by the muscle during fatigue respectively?

•Which of the following represents the difference between the steps of formation of both pollen grains and ovules in flowering plants?

•The opposite figure shows the role of two hormones secreted from the same gland, study it, then answer:

•Which of the following isconsidered the correct effectof the two hormones

•Which of the following describes the eggplant fruit?

•The opposite figure shows a joint in the human body, what is the structure that is responsible for determining the movement direction in this joint?

•A person performs a blood test for TSH level, and the analysis result appeared as shown. If he doesn’t sufferfrom any defect inthe pituitary gland, what may this person suffer from?

•Study the opposite figure, the determine :

•Which of the following characterized this stage ofembryo development?

•The opposite figure shows a part of a plant stem epidermis, what is the type of immune response appeared in (X)?

•Study the opposite graph which shows a vital process inside the pea plant ovules (their somatic cells contain 14 chromosomes), then deduce, what is the process expressed in (A) and (B) together?

•The opposite figure shows the structure of an immune component in the immune system, what is the result of replacing an amino acid with another one in region (A)?

•What is the reason for decreasing the fertility rate in a 25 years old female ?

•All or none law is the law that controls the muscle contraction, which means that the muscle doesn’t contract unless the stimulus is sufficient to stimulate it to contract, so that the muscle contracts with its maximum strength, if two identical muscles are exposed to two stimuli which are sufficient to stimulate them but the first stimulus is double the strength od the second stimulus. what is the result of this state?

•The opposite graph shows the relation between the number of sperms and the probability of fertilizing the ovum in a human female, which of the following could be deduced from this graph?

•Which of the following describes the opposite twin?