Welcome to your Biology 2005
1.
Which one of the following is the main constituent of biological membranes?
2.
One of the following biomes in Africa is supporting large wild mammals such as elephants, giraffes and lions.
3.
Which of the following steps in the scientific method comes following observation?
4.
The main components of the plant cell wall are ____________?
5.
Which of the following classes of enzymes digests carbohydrates?
6.
Which of the following kingdoms of life is consisting of prokaryotic organisms?
7.
Which component of soil fertility is improved when farmers grow legumes in crop rotation ?
8.
Before making crosses, which part of the flower did Mendel remove to avoid self pollination?
9.
Which one of the following do bees use to inform other bees about location and distance of a new source of nectar they discover?
10.
One of the following molecules is the building units of an enzyme molecule.
11.
What are the specialists in biology called if he/she studies fossils to generate new knowledge on the origin and evolution of living things of past geologic periods?
12.
All proteins contain carbon, hydrogen, oxygen and what other element?
13.
Which of the following is the correct F2 phenotypic ratio of a monohybrid cross?
14.
How many carbon atoms are there in one disaccharide molecule?
15.
Which unit is best to use for measuring the smallest cells and organelles?
16.
Which energy rich organic compound contains adenine in its molecule ?
17.
What are the most frequent causative agents of food poisoning?
18.
What are the most likely causes of variations within species?
19.
. In which hominid species did scientists find the smallest brain size (cranial capacity)?
20.
Which of the following is NOT classified as a learned behavior?
21.
In which one of the following aspects is the tropical rain forest biome poor?
22.
If the size of a cell increase, which one of the following gets smaller?
23.
What makes unsaturated fatty acids different from saturated fatty acids?
24.
Which of the following pairs of molecule are known to have catalytic activity?
25.
If a suspension of a mixture of cellular organelle is spun in a centrifuge, which organelle settles to the bottom first?
26.
During chemiosmosis, what substance diffuses from one side to the other side of the membrane?
27.
Which of the following human diseases can be prevented by taking proper diets?
28.
When two species are compared ,which of the following sources of evidence is least informative about the degree of relationships between the species?
29.
Which of the following practices dose NOT normally transmit HIV?
30.
What is the important role played by microorganism such as bacteria and fungi in the ecosystem?
31.
Which of the following theories explains evolutionary changes of living things in terms of changes in their allele frequencies?
32.
Which of the following is an important function of the Golgi apparatus?
33.
Which of the following is NOT usually true as an ecological succession progresses to advanced seral stages ?
34.
One of the following is an important cause of gene of gene mutation.
35.
What is the reproductive isolating mechanism called if two species of forgs do not interbreed because they cannot understand the mating calls of one another
36.
How many chromosomes do humans inherit from each of their parents?
37.
In which one of the four phases of population growth is the number of the population the highest ?
38.
Which of the following is NOT true abut the gene called SRY?
39.
To which of the following groups do those bacterio phages that integrate their DNA in to the chromosome of their bacterial host belong?
40.
What do we call the learned behavior if a mouse that had just escaped from the mouth of a cat jumped violemy at a slight touch by a trivial object?
41.
In which of the following features are eukaryotic cells distinguished from prokaryotic cells?
42.
What will happen if human red biood cells are kept in a hypotonic solution
43.
Which of the following field equipment is used to detrmine an exact location of a place?
44.
The sheep 'dolly' is an example of which biotechnological manipulation of animals by human?
45.
Among the following ,which one is the best criterion to show that two population belong to same species?
46.
In the process of the evolution of life on earth , which of the following four processes evolved last?
47.
What is a theory in biology?
48.
For which of the following is a theodolite used in biology education?
49.
What is the name of the suger found in milk?
50.
To which class of enzymes do the digestive enzymes belongs?
51.
Which of the following crops is considered to be the best choice for a better balance of essential amino aides as a human diet?
52.
What is the main reason fore the high species richness of pants and mammals observed in Ethiopia?
53.
In which type of solution is the water potential more negative than in the cells?
54.
Which of the following paired organelle are membrane-bound?
55.
Most cell membrane are primarily composed of which compounds
56.
Which group of micro-organisms cause the diseases known as athletes foot?
57.
Choose the one that is different from all the others.
58.
Under which of the following groups can the fungi be more conveniently placed?
59.
What is the type of community called when it has reached the final and most complex stage of a succession
60.
Which of the following is an ecosystem
61.
Which of the following characteristics can show the evolutionary relationships among organism?
62.
The group of the Ethiopian wolf does NOT contribute to territory marking with their urine containing pheromones is __________.
63.
In which of the following are flowers and fruits found?
64.
In a cross between heterozygous what proportion is expected to be homozygous recessive?
65.
Gene silencing is the function of one of the following molecules.
66.
Which processes is held responsible for chronic myelogenous leukemia?
67.
Two parents of genotype Aa are cross-bred .The alleles show complete dominance. What proportion of the offspring will phenotypically look like their parents?
68.
Which one of the following concepts contains all the other ?
69.
Choose the one that is NOT a requirement of all living things.
70.
What is the advantage of using HAART (highly active antiretroviral therapy ) for the treatment of HIV
71.
In which of its contents RNA differs from DNA?
72.
Which of the following cell types can be rich in lysosomes?
73.
What can one conclude about the contents of the food stuff if a mixture of Benedict solution and foodstuff remain blue after heating ?
74.
Which of the following types of enzyme inhibitions can be removed when the end product of the metabolic pathway is depleted?
75.
If red blood cells shrink when placed in a certain solution ,what is the strength of the solution relative to the strength of the protoplasm of the cells?
76.
Which of the following is NOT true about photo system-II?
77.
On which one of the following principle are most of the anti-HIV drugs currently in use working?
78.
Among the following mating, where the ABO blood genotype of the partners are shown, identify the mating in which all the children will have the same blood type.
79.
If a new mutant allele arises in a certain population, which of the following factors determines if the allele is going to b adaptive or non- adaptive
80.
Which of the following is the correct route that connects a stimulus and a response?
81.
In which of the following compound are both members of the pair are polymers of carbohydrates that naturally occur in plants only?
82.
Which of the following is generally expected to give better health benefits when presence in human diet?
83.
What is the important of chemiosmosis in photosynthesis and cellular respiration?
84.
If the age pyramid of a certain country is narrowing at the base ,what does this tell about the trend of the population size of the country? The population size is:
85.
Suppose the amino acid coding region in a mRNAis 1200 nucleotides long, how long is the protein in terms of amino acid number?
86.
If a new anti-HIV drug is to be developed to prevent the virus form entering the host cell, which one of the following processes should the drug target?
87.
Which one of the following factors is NOT important for evolutionary change of a population
88.
One of the following would be harder to see under the ordinary light microscope that is more likely to be available in school laboratories .
89.
In some human liver cells there are 92 chromosome per cell. What is the ploidy level of such cells?
90.
Which of the following groups of substance are all inorganic?
91.
To what kind of animal behavior can the spinning of a web by a spider be classified?
92.
Which of the following is a recently developed active area of research in biology today?
93.
Where dose the light dependent reaction of photosynthesis occur in the chloroplast?
94.
For which of the following is the sugar produced by photosynthesis NOT used?
95.
In which process is ATP generated during short distance hight speed running ?
96.
Which one of the following choices shows the end products of a mitotic cell division?
97.
What exactly happens during a substitution mutation?
98.
During the course of evolution, which of the following events came before all the others?
99.
What kind of natural selection is at work in a situation where individual at both extreme ends of the range get better survival advantages that those around the middle?
100.
In which geologic period does the fossil record show more diverse and relatively higher forms of organism?
