51. A network of membranous tubules and sacs called cisternae describes the:
Answer: B. endoplasmic reticulum
Biology Class 11 Unit 1: Cell and Sub-Cellular Organelles MCQs
144 multiple choice questions with the correct answer for each. Tap an option to check yourself, or switch on "Show all answers". This is page 2 of 3.
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52. Which organelle synthesizes lipids, steroids and detoxifies drugs in liver cells?
Answer: B. Smooth ER
53. Secretory proteins leave the rough ER in vesicles that bud from a region called:
Answer: B. transitional ER
54. Eukaryotic ribosomes are:
Answer: B. 80S with 40S and 60S subunits
55. Ribosomes are formed in the:
Answer: C. nucleolus
56. Ribosomal subunits are held together by the presence of:
Answer: B. magnesium ions
57. A chain of many ribosomes attached to one mRNA is called a:
Answer: B. polysome
58. The Golgi complex was discovered in 1898 by:
Answer: B. Camillo Golgi
59. The forming face of the Golgi complex is called the:
Answer: B. cis face
60. The Golgi complex gives rise to which structures?
Answer: C. Lysosomes, peroxisomes and glyoxysomes
61. During cytokinesis in plant cells, Golgi vesicles fuse at the equator to form the:
Answer: B. phragmoplast
62. Lysosomes contain about:
Answer: C. 40 digestive enzymes
63. The contents of a lysosome are:
Answer: C. acidic
64. The digestion of the cell's own worn-out organelles by lysosomes is called:
Answer: B. autophagy
65. Lysosomes are called suicidal bags because:
Answer: B. they can burst and digest the cell during autolysis
66. Peroxisomes are abundant in liver cells because they:
Answer: C. detoxify alcohol using catalase
67. The enzyme that breaks down hydrogen peroxide into water and oxygen is:
Answer: B. catalase
68. Glyoxysomes are found only in:
Answer: B. germinating oil-rich seeds
69. In glyoxysomes the glyoxylate cycle converts:
Answer: B. stored fatty acids to carbohydrates
70. The membrane that surrounds the central vacuole of a plant cell is the:
Answer: B. tonoplast
71. Contractile vacuoles in freshwater protists:
Answer: B. pump excess water out of the cell
72. The inner mitochondrial membrane is folded into:
Answer: C. cristae
73. Fo-F1 particles on the cristae are actually:
Answer: B. ATP synthase enzymes
74. The outer mitochondrial membrane is freely permeable because of the presence of:
Answer: B. porins
75. The mitochondrial matrix contains:
Answer: B. small circular DNA, RNA and 70S ribosomes
76. Mitochondria divide by:
Answer: C. fission
77. The stack of smaller thylakoids in a chloroplast is called a:
Answer: B. granum
78. Light-dependent reactions of photosynthesis occur in the:
Answer: B. grana
79. Enzymes for the light-independent reactions are found in the:
Answer: A. stroma
80. Colourless plastids found in roots, stems and seeds are:
Answer: C. leucoplasts
81. Centrioles are composed of:
Answer: C. nine triplets of microtubules
82. Centrioles also give rise to the:
Answer: B. basal bodies of cilia and flagella
83. The three types of cytoskeleton fibres are:
Answer: B. microfilaments, microtubules, intermediate filaments
84. The nuclear pores are composed of a transport protein called:
Answer: B. nucleoporin
85. The nucleolus is involved in the:
Answer: B. construction of ribosomes
86. The two chromatids of a chromosome are joined at the:
Answer: B. centromere
87. Which of the following is the correct pair for prokaryotic cells?
Answer: B. 70S ribosomes, one circular chromosome and plasmids
88. Prokaryotic cells divide by:
Answer: C. binary fission
89. The locomotory structure of prokaryotes is made of:
Answer: C. flagellin
90. Stem cells that can differentiate into ALL possible cell types, such as the first cells of the zygote, are:
Answer: C. totipotent
91. Adult hematopoietic stem cells that give red cells, white cells and platelets are:
Answer: C. multipotent
92. Induced pluripotent stem cells (iPSCs) were first described in 2006 by:
Answer: B. Shinya Yamanaka
93. A major disadvantage of iPSCs is that:
Answer: B. retroviruses used to make them may trigger cancer
94. Phagocytosis is also called:
Answer: B. cell eating
95. Pinocytosis is also called:
Answer: B. cell drinking
96. The vesicle formed during pinocytosis is called a:
Answer: B. pinosome
97. Exocytosis is the process of:
Answer: B. transporting material from inside the cell to the outside using vesicles
98. Cholesterol absorption by cells is an example of:
Answer: C. receptor-mediated endocytosis
99. The shortest phase of the cell cycle is the:
Answer: D. M phase
100. Chromosomes are duplicated only during the:
Answer: B. S phase
About Biology Class 11 Unit 1 MCQs (Federal Board)
These 144 Biology MCQs cover Class 11 Unit 1: Cell and Sub-Cellular Organelles of the Federal Board (FBISE) HSSC-I (1st Year / Class 11) syllabus. They are SLO-based MCQs as per the new pattern for FBISE exams. Each question has four options and the correct answer is shown, so you can practise for the annual examination and find the topics you still need to revise. The questions are split over 3 pages of 50. Use the Print button to save this chapter as a PDF.