Welcome to your GRADE 12 BIOLOGY MODEL EXAMINATIONS 2017
BIOLOGY MODEL EXAMNATION FOR GRADE 12 STUDENTS IN 2017 E.C
1.
The vaccine against terrible cattle disease rind pest was made by __________.
2.
Which of the following Ethiopian Biologist has been honored by developing high yielding strains of sorghum?
3.
Ethiopian Biologist who worked on effects of chemical pesticides on human is___________.
4.
Ethiopian Biologist who has made a soap berry to eradicate snail which is intermediate host of bilharzia :
5.
Among the following renowned Ethiopian Biologists who discover two 160,000 years old human skulls which have a big impact on the study of human evolution?
6.
All are the major research areas of EHNRI except
7.
Ethiopian Biological research center which is involved in mechanized farming is:
8.
Ethiopian Biological research center which is highly devoted on research related to Leprosy is:
9.
Among the following institutes which one is working on the management of the ecosystem?
10.
The resolution power of a microscope used to:
11.
Preparation of specimen to see under the microscope is known as ____________.
12.
Cells that are adapted to carry out a particular body function are:
13.
A cell with a large number of mitochondria is expected to:
14.
Which of the following structures of the cell are involved in the synthesis of protein?
15.
Which of the following organelle is the site of photosynthesis?
16.
The movement of water molecules from a region of high concentration to low concentration is
17.
Which of the following is true about rate of diffusion?
18.
The movement of substances from the region of higher concentration to lower concentration along concentration gradient is called ________.
19.
If an animal cell is put in concentrated salt solution which of the following event will happen?
20.
The most common monomer of carbohydrate is a molecule of___________ ?
21.
When 50 amino acids joined together through condensation reaction, how many peptide bonds are formed and water molecules are released respectively?
22.
Unsaturated fatty acids are differ from saturated fatty acids except___________
23.
Which of the following minerals is important constituent of bone and teeth needed for many metabolic processes?
24.
One of the following vitamins is needed for the formation of connective tissues which holds the body together?
25.
Water is crucial in human body for a number of reasons. Which one is not correct about their functions?
26.
Which one of the following is not the part of a balanced diet?
27.
Which one of the following is orders of digestive system that correctly illustrates from the beginning to the end
28.
In grade 9 laboratory class, the teacher gives the students a sampler of food and asked them to investigate the presence of glucose. What kind of test and result will enable the students to confirm the presence of glucose respectively?
29.
Which of the following factor affecting enzyme activity without denaturing the enzyme molecule?
30.
The shapes of different teeth in humans are ideally suited to their various functions. Which type of teeth is not correctly matched with their functions?
31.
In a Benedict’s test for sucrose, why does the test sample first boil with hydrochloric acid?
32.
Which deficient nutrients are correctly paired with their deficiency diseases?
33.
When you breathe out during gas exchange, all of the following happens to the breathing movement except?
34.
The muscle that separate the chest cavity from the abdominal cavity is known as_________
35.
Which of the following is the correct path way of breathing from the outer to the inner parts?
36.
While oxygen is carried by the red blood cells, most digested food and wastes are carried by the
37.
The absolute maximum amount of air you can take into or breathe out of your lungs is called
38.
Which of the following products are formed during anaerobic respiration of one glucose molecule in animal cells?
39.
Which of the following is the types of blood vessels that carries deoxygenated blood from the heart to lungs is called_________
40.
The right side chamber valve which directs the flow of blood by opening and closing is called_________
41.
Which one of the following statement is true about pulmonary circulation?
42.
Which organic molecule in our body has functions as antigens & antibodies of immune system?
43.
The blood group of human being which is commonly referred to as “universal acceptor” is
44.
All of the following factors that can be increases the risks of developing hypertension except?
45.
The modern technological instruments are learnt from nature by the process of
46.
The relevance and promise of biology as a field of science can be best explained by its application
47.
Among the following which one is incorrect statement about the importance of nature for imitating technological products?
48.
Which technological products have been made through imitation of termite mound architecture?
49.
Which one of the following are the impact of biology on society and natural world except?
50.
Among which explanation is correctly concerned about ethical issue in biology?
51.
Which common characteristics of animals that have balanced arrangement of body parts around a central point or axis?
52.
Which one of the following is the common characteristic of invertebrate animals?
53.
The form of animal fertilization which young develop within the female by receiving nourishment from mother’s blood through placenta is
54.
During reproduction, some individual insects are develop from unfertilized eggs by the process of
55.
Among which of the following organisms reproduce by external fertilization?
56.
Why temperature is the environmental factors that determine sex during incubation of crocodiles?
57.
Which mating system of birds those involve with two or more members of the opposite sex during a reproductive season?
58.
Which developmental processes of germ layers later develop into organs and organ system?
59.
All of the following are considered as a beneficial aspects of insects except?
60.
Which one of the following is true about harmful aspect of insect in agriculture?
61.
Which one of the following examples of behavior describes when an animal stops responding to stimulus or cue after a period of repeated exposure?
62.
The Ethiopian wolf lives and hunt in packs. During patrolling their habit, both male and female wolves of the group maintain their area with urine containing pheromone. This pattern of behavior is an example of
63.
A quick withdrawal of your hand from a hot plate is an example of
64.
An increase in blood sugar level causes the pancreases to release of the hormone insulin; insulin lowers blood sugar level, restoring the body to its original blood glucose level by converting glucose to glycogen. This is an example of
65.
Which one of the following statement explains the specificity of enzymes?
66.
Which protein structures have three-dimensional arrangement and unique shape of all amino acids in a single polypeptide chain?
67.
Which enzyme-substrate model that shows a change in shape of active site of an enzyme?
68.
The type of inhibitor that blocks the binding of the substrate to the active site by competition is
69.
One hundred forty-three thousand, three hundred forty-six and sixty-four cents.
70.
Which of the following is true about feedback inhibition?
71.
Which commercial fermentation uses of enzyme that is important for clarification of fruit juices?
72.
Which type organic molecules that are mainly derived from vitamins?
73.
In an enzyme catalyzed reaction, the substance that is used again and again is
74.
The process of heating treatment of germinated grain to dry the green malt and prevent from further germination is known as
75.
Which one of the following involves cutting back the shoots of plants to about 10-15 cm above the ground and allowing the stumps to regrow and Produce more branches?
76.
The first vitamin Produced by the fermentation process of bacteria was __________________
77.
The state in which all people have physical, social and economical access to sufficient, safe and nutritious food is
78.
Recently discovered biosensor can detect all except
79.
All are correct about genetic fingerprinting except
80.
Which one of the following is the characteristic of bacteria?
81.
Which one of the following archea can live in extremely hot temperature?
82.
Which one of the following fungi has been used as a test in organisms to determine Mg, Cu, Zn and MO in the soil?
83.
Which one of the following protozoa causes changes disease?
84.
All are correct about lysogenic cycle except
85.
Which one is the viral symmetry refers to the shape with 20 triangular faces and 12 corners?
86.
Which of the following soil bacteria produce powerful protein toxin that used to kill insect pests?
87.
All are correct about catabolism except
88.
Where the light-independent stage of photosynthesis is does take place?
89.
Which one of the following photosynthetic pigments absorbs mostly blue and yellow light?
90.
Which one of the following photosynthetic pigments found only in the photosynthetic members of Chromista and Dinoflagellates?
91.
All are correct about photosystem II except
92.
Which one of the following is incorrect about light independent reaction?
93.
Which one of the following processes occurs during light independent reaction of photosynthesis?
94.
The first stage of cellular respiration that takes place in the absence of oxygen is called ________
95.
The amount of net ATP that glycolysis provides to a cell is:
96.
In the mitochondrial matrix pyruvic acid reacts with a molecule of coenzyme A to form
97.
Pyruvic acid reacts with coenzyme A to form Acetyl CoA.
98.
The final electron acceptor in the electron transport chain is ___________.
99.
The electron transport chain and the enzyme ATP synthase are embedded in the
100.
All of the following occurs during Lactic acid fermentation except?
