General Biology I — 2025C Past Questions

University of Ilorin BIO101: 225 questions.

Topics: Cell Structure and Organisation, Functions of Cellular Organelles, Living things, Characteristics and Reproduction, Heredity & Evolution, Chromosomes & Genes

1. Which is not an effect of competition?
   1. Resource partitioning
   2. Niche differentiation
   3. Increased aggression
   4. Mutualism
2. The following are part of the cell theory except...
   1. All living organisms are made up of one or more cells
   2. All cells arise from pre-existing cells
   3. All cells are created equal
   4. The activity of an organism depends on the total activity of independent cells
3. The following deals with taxonomy except...
   1. Classification
   2. Nomenclature
   3. Identification
   4. Evolution
4. In a dihybrid cross between AaBb, which proportion of organisms exhibit phenotype of dominant traits?
   1. 1/4
   2. 3/16
   3. 9/16
   4. 1/16
5. What is the ratio of the monohybrid F2 generation cross?
   1. 1:2:1
   2. 1:1
   3. 3:1
   4. 9:3:1
6. Mitosis occurs in which cells?
   1. Sex cells
   2. Autosomes
   3. Non-somatic cells
   4. Germ cells
7. Chiasma is in which stage of cell division and which type of cell division?
   1. Prophase I, Meiosis
   2. Metaphase I, Meiosis
   3. Anaphase I, Meiosis
   4. Telophase I, Meiosis
8. Plant that produces fruit for 1 year and die?
   1. Biennial
   2. Annual
   3. Perennial
   4. Monocarpic
9. At which stage in Meiosis does the daughter cells separate completely?
   1. Anaphase II
   2. Telophase II
   3. Telophase I
   4. Anaphase I
10. Which of the following is an obligate scavenger?
    1. Vulture
    2. Hyena
    3. Lion
    4. Tiger
11. Which of the following are acellular?
    1. Virus
    2. Bacteria
    3. Fungi
    4. Protists
12. Which of the following are the most primitive, that the simplest forms belong?
    1. Monera
    2. Protista
    3. Fungi
    4. Animalia
13. Phylogenetic taxonomy studies the...
    1. Evolutionary relationships among organisms
    2. Structural characteristics of organisms
    3. Functional characteristics of organisms
    4. Developmental characteristics of organisms
14. What is the theory of use and disuse
    1. Lamarckism
    2. Darwinism
    3. Mendelism
    4. Neo-Darwinism
15. Which histone protein is peferable for comparism across the sequence in eukaryotic cell
    1. H2A
    2. H1
    3. H3
    4. H2B
16. Which of the following solved the problem of scientists remembering 1.5 million organisms?
    1. Hierarchy
    2. Taxonomy
    3. Systematics
    4. Evolution
17. What is spontaneous generation?
    1. The process by which living organisms arise from non-living matter
    2. The process by which living organisms evolve from other living organisms
    3. The process by which living organisms adapt to their environment
    4. The process by which living organisms reproduce
18. What is the role of variation in Darwin's theory of evolution?
    1. Variation provides the raw material for evolution
    2. Variation is the driving force behind evolution
    3. Variation is the result of evolution
    4. Variation is not important in evolution
19. Which scientist said all plants contained cells, which later formed the basis of cell theory?
    1. Matthias Jakob Schleiden
    2. Theodor Schwann
    3. Antonie van Leeuwenhoek
    4. Robert Hooke
20. Pollination by animals is known as...
    1. Self-pollination
    2. Cross-pollination
    3. Zoophily
    4. Hydrophily
21. DNA is found in...
    1. Nucleus
    2. Mitochondria
    3. Chloroplasts
    4. All of the above
22. Which of the following will you do when trying to classify a group of students in a class?
    1. Group by height
    2. Group by age
    3. Group by gender
    4. Group by academic performance
23. What is the function of histone protein
    1. Cell division
    2. Packaging
    3. Compactness
    4. Structural support
24. A functional chromosome has...
    1. Telomere
    2. Centromere
    3. All of the above
    4. Origin of replication
25. The folded inner part of mitochondria...
    1. Cisternae
    2. Cristae
    3. Matrix
    4. Outer membrane
26. The confusion of animal diversity is aided by the rapid rate of...
    1. Distribution
    2. Evolution
    3. Reproduction
    4. Extinction
27. How many species did Carolus Linnaeus name?
    1. 1,200
    2. 300
    3. 5,500
    4. 12,000
28. Which of these associations of a parasite kills its host over time?
    1. Parasitism
    2. Commensalism
    3. Parasitoidism
    4. Mutualism
29. Which of the following is not found in prokaryotic cells?
    1. All of the above
    2. Nucleus
    3. Ribosome
    4. Vacuole
30. Tonoplast is associated with..
    1. Protoplasm
    2. Vacuole
    3. Cell wall
    4. Plasma membrane
31. Single membrane-bound round organelle made up of fine granules except for crystalloid and filamentous deposit?
    1. Ribosome
    2. Microbodies
    3. Lysosomes
    4. Peroxisomes
32. Who was the first to discover chromosomes?
    1. Waldeyer
    2. Strasburger
    3. Schleiden
    4. Schwann
33. Which scientist first discovered the cell structure in plants?
    1. T. Schwann
    2. M. Schleiden
    3. A. van Leeuwenhoek
    4. R. Hooke
34. Which type of competition involves aggression?
    1. Interference
    2. Exploitative
    3. Apparent
    4. None of the above
35. Crop-weed has what type of competition?
    1. Interference
    2. Exploitative
    3. Apparent
    4. None of the above
36. Which of the following is an active predator?
    1. Lion
    2. Cheetah
    3. Snake
    4. Hawk
37. Ability to respond to stimuli is...
    1. Sensitive
    2. Irritability
    3. Others
    4. None of the above
38. A flower with only female parts is called...
    1. Monoecious
    2. Dioecious
    3. Pistillate
    4. Staminate
39. Which of the following are parasitoid organisms except...
    1. Wasp
    2. Spider
    3. Flies
    4. Beetles
40. At what mitotic stage is spindle fiber formed?
    1. Metaphase
    2. Prophase
    3. Anaphase
    4. None of the above
41. How many sister chromatids are formed at the mitotic metaphase?
    1. One
    2. Two
    3. None
    4. Three
42. Which is a physical inheritable character?
    1. Height
    2. Blood group
    3. Eye color
    4. All of the above
43. Viewing a cell under a microscope is known as...
    1. Ultrastructure
    2. Super structure
    3. Higher structure
    4. Hyper structure
44. A single nucleotide of a DNA is mutated for a gene responsible for an enzyme. What process can make the mutation spread through the species and over generations?
    1. Natural selection
    2. Genetic drift
    3. Epistasis
    4. Pleiotropy
45. A plant with one reproductive organ in its flower is called...
    1. Bisexual
    2. Unisexual
    3. Monocarpic
    4. Dioecious
46. What is another name for kinetochore?
    1. Centric
    2. Chromomere
    3. Centromere
    4. Kinetosome
47. How many gametes are formed in RrRr?
    1. 1
    2. 2
    3. 4
    4. 8
48. The genetic makeup of a female is best written as...
    1. 44A and XX
    2. 44A and XY
    3. 46A
    4. 46X
49. A type of competition that involves sharing resources is...
    1. Apparent competition
    2. Exploitative competition
    3. Explorative competition
    4. Interference competittion
50. Which of the following is not viviparous?
    1. Snake
    2. Gorilla
    3. Man
    4. All of the above
51. ____ attach itself to the whale and feeds on ____.
    1. Barnacles and plankton
    2. Remora and crustaceans
    3. Remora and plankton
    4. Barnacles and crustaceans
52. Which of the following is not true of natural classification?
    1. It depicts imposed characters
    2. It involves evolutionary relationships
    3. It is based on morphology
    4. It is based on genetics
53. Which of the following is a non-membrane-bound organelle?
    1. Ribosome
    2. Vacuole
    3. Cytoskeleton
    4. Lysosome
54. Which cell organelle does autophagy take place?
    1. Cell wall
    2. Lysosome
    3. Nucleus
    4. Mitochondria
55. What is the importance of symbiosis except
    1. Niche differentiation
    2. Nutrient cycling
    3. Biodiversity
    4. Ecosystem balance
56. Which cell organelle can undergo secondary thickening?
    1. Cell wall
    2. Nucleus
    3. Cytoplasm
    4. Endoplasmic reticulum
57. Dihybrid cross experiment shows which law?
    1. Law of independent assortment
    2. Law of segregation
    3. Law of dominance
    4. Theory of chromosome inheritance
58. Who was the first scientist to use the term cell?
    1. Theodor Schwann
    2. Robert Hooke
    3. Antonie van Leeuwenhoek
    4. Matthias Jakob Schleiden
59. What type of competition leads to the decline in population of the other organism?
    1. Exploitative
    2. Interference
    3. Apparent
    4. Explorative
60. The Mendelian experiment that gave a 9:3:3:1 ratio explains which law?
    1. Law of segregation
    2. Law of independent assortment
    3. Law of dominance
    4. Law of uniformity
61. Who contributed significantly to cell theory?
    1. Matthias Jakob Schleiden
    2. Theodor Schwann
    3. Rudolf Virchow
    4. Antonie van Leeuwenhoek
62. Which RNA is present in the nucleus during cell division?
    1. mRNA
    2. tRNA
    3. rRNA
    4. None of the above
63. Dihybrid crossing follows which mendelian law?
    1. Law of segregation
    2. Law of independent assortment
    3. Law of dominance
    4. Law of uniformity
64. Car Von Linne divided plants and animals into?
    1. Kingdoms and classes
    2. Genera and species
    3. Families and orders
    4. Phyla and classes
65. Which of the following occurs at metaphase?
    1. Chromosomes become shorter
    2. Chromosomes become thicker
    3. Chromosomes become longer
    4. A and B
66. Which of the following are not diverse?
    1. Size
    2. Reproduction
    3. Nutrition
    4. All of the above
67. In a dihybrid cross of two organisms with the genotype (AaBb), what's the fraction of offspring that'd be dominant for both characters?
    1. 1/16
    2. 9/16
    3. 3/16
    4. 10/16
68. In a cross between two organisms which gives a ratio of 9:3:3:1, what mendelian law explains this?
    1. Law of independent assortment
    2. Law of dominance
    3. Law of segregation
    4. Law of uniformity
69. Nutrition, respiration, and reproduction are characteristics of:
    1. All plants and animals
    2. Only plants
    3. Some plants and animals
    4. Only animals
70. Ribosomes are primarily found where?
    1. Freely in the cell or attached to endoplasmic reticulum
    2. Only in the nucleus
    3. Only in the mitochondria
    4. Only in the cytoplasm
71. Cell organelles are:
    1. Cell components with distinct structure and function
    2. Cell components with specific function
    3. Cell components with no function
    4. Cell components with no structure
72. Chiasmata is formed in what stage?
    1. Prophase I
    2. Metaphase I
    3. Anaphase I
    4. Telophase I
73. Role of saprophytes in the ecosystem.
    1. Decomposers
    2. Producers
    3. Consumers
    4. None of the above
74. Prokaryotic cells have ———nuclear membrane?
    1. Single
    2. Double
    3. None
    4. None of the above
75. Which of the following is not a type of competition?
    1. Interference
    2. Exploitative
    3. Apparent
    4. Mutualistic
76. Blood cells are which type of cells
    1. Muscle cells
    2. Epithelial cells
    3. Connective tissue
    4. Nerve cells
77. Which of the following is constantly found in the nucleus?
    1. RNA
    2. Proteins
    3. DNA
    4. Histones
78. Which of the following protein is not associated with chromatin?
    1. Histones
    2. Condensin
    3. SMC proteins
    4. Topoisomerase
79. Which of the following is a type of ecological relationship?
    1. Mutualism
    2. Commensalism
    3. Parasitism
    4. All of the above
80. Which of the following is an example of ambush predation?
    1. Crocodile
    2. Cheetah
    3. Hawk
    4. Lion
81. Which of the following is not a type of protein embedded in plasma membrane?
    1. Integral protein
    2. Peripheral protein
    3. Structural protein
    4. Enzyme
82. Which of the following sex chromosomes are for males?
    1. XXY
    2. XY
    3. XX
    4. XXX
83. Who was the first to observe chromosomes?
    1. Waldeyer
    2. Antonie van Leeuwenhoek
    3. Robert Hooke
    4. Matthias Jakob Schleiden
84. What is the total number of chromosomes found in a female?
    1. 44
    2. 46
    3. 48
    4. 50
85. A type of relationship where one of the organism involved benefits and live at the expanse of the other is?
    1. Parasitism
    2. Mutualism
    3. Saprophitism
    4. Symbiosis
86. Sex-linked disease...
    1. Colorblindness
    2. Hemophilia
    3. Sickle cell anemia
    4. All of the above
87. Which involves gradual decline in one of the organisms?
    1. Mutualism
    2. Commensalism
    3. Parasitism
    4. Competition
88. The daughter cells fully separate at which stage?
    1. Anaphase
    2. Telophase
    3. Cytokinesis
    4. Prophase
89. How is the chromosome of a female human written?
    1. XX
    2. XY
    3. XXY
    4. XXX
90. Which of the following includes the blood tissues?
    1. Connective tissue
    2. Epithelial tissue
    3. Muscle tissue
    4. Nervous tissue
91. DNA uncondenses in which mitotic phase?
    1. Prophase
    2. Metaphase
    3. Anaphase
    4. Telophase
92. Parasitoidism meaning...
    1. An organism that kills its host
    2. An organism that lives on its host
    3. An organism that lives inside its host
    4. An organism that eats its host
93. In a test cross between a plant of an unknown genotype and another with a homozygous recessive genotype, if the phenotypic ratio is 1:1, what is the possible genotype of the unknown plant?
    1. RR
    2. Rr
    3. rr
    4. Rr or rr
94. Which of the following is true about the chromatid of a cell?
    1. It is the duplicate chromatids
    2. It has haploid chromosome
    3. None of the above
    4. It is a copy of a chromosome
95. At the anaphase stage in the formation of red blood cells in the bone marrow, each chromosome has...
    1. One chromatid
    2. Two chromatids
    3. Four chromatids
    4. No chromatid
96. What cell produce diploid cell
    1. Autosomes
    2. Non somatic
    3. Somatic cells
    4. Germ cells
97. At what stage do they move to opposite
    1. Prophase
    2. Metaphase
    3. Anaphase
    4. Telophase
98. What instrument aided the discovery of cell?
    1. Telescope
    2. Microscope
    3. Magnifying glass
    4. Spectroscope
99. The relationship between sea anemones and clownfish is?
    1. Mutualism
    2. Commensalism
    3. Parasitism
    4. Predation
100. The phenotypic ratio of the F2 generation of a monohybrid cross is
     1. 9:3:3:1
     2. 1:2:1
     3. 3:1
     4. 1:1

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