101. The word "mitosis" comes from the Greek word "mitos" meaning:
Answer: C. thread
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 3 of 3.
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102. Which is the longest stage of mitosis?
Answer: B. Metaphase
103. Which is the shortest stage of mitosis?
Answer: C. Anaphase
104. Chromosomes line up on the metaphase plate during:
Answer: B. metaphase
105. Sister chromatids separate and move to opposite poles during:
Answer: B. anaphase
106. Nuclear envelopes re-form around the two sets of chromosomes in:
Answer: C. telophase
107. The pinching of the animal cell membrane during cytokinesis forms the:
Answer: B. cleavage furrow
108. Meiosis in animals produces:
Answer: B. sperms and eggs
109. The pairing of homologous chromosomes in prophase I is called:
Answer: B. synapsis
110. A tetrad (bivalent) consists of:
Answer: B. four chromatids and two centromeres
111. The X-shaped point where homologous chromatids cross is the:
Answer: C. chiasma
112. Exchange of chromosome segments between homologues is called:
Answer: B. crossing over
113. Meiosis II is similar to:
Answer: B. mitosis
114. DNA does NOT replicate during:
Answer: B. Interphase II
115. At the end of meiosis I, the two daughter cells are:
Answer: B. haploid
116. Which is a significance of meiosis?
Answer: C. Genetic variability and constant chromosome number across generations
117. Which is a significance of mitosis?
Answer: B. Growth, wound healing and regeneration with identical daughter cells
118. In an electron microscope the denser regions of the specimen:
Answer: B. scatter more electrons
119. The cell cycle checkpoint at the G1/S transition is called the:
Answer: A. G1 checkpoint
120. Which of the following has a double membrane?
Answer: C. Chloroplast
121. The total magnification used is:
Answer: C. 400X
122. The student cannot see the ribosomes in this slide because the light microscope has:
Answer: B. a resolving power of about 250 nm, too low for ribosomes
123. To see the internal ultrastructure of the mitochondria she should use a:
Answer: C. transmission electron microscope
124. Why are chloroplasts absent in these cells?
Answer: C. Chloroplasts occur in green parts and root cells contain leucoplasts instead
125. The proteins are first made by ribosomes attached to the:
Answer: B. rough ER
126. The proteins then move in transport vesicles to the:
Answer: C. Golgi complex
127. The Golgi complex of this cell would be:
Answer: C. abundant, as the cell is secretory
128. The final step in releasing the enzymes out of the cell is:
Answer: B. exocytosis
129. The organelle that increases in activity in the tail cells is the:
Answer: B. lysosome
130. The type of programmed cell death in which lysosomes burst and release enzymes is:
Answer: C. autolysis
131. The fragments of the dead cells are removed by:
Answer: B. phagocytosis by other cells
132. The enzymes responsible are mainly:
Answer: C. hydrolases
133. Entry of glucose into the red cell down its gradient through a carrier protein is:
Answer: B. facilitated diffusion
134. The sodium-potassium pump uses:
Answer: C. ATP
135. In the pump, sodium ions are moved:
Answer: B. out of the cell, and potassium in
136. Active transport is stopped if the cell stops:
Answer: C. respiration
137. These reprogrammed cells are called:
Answer: C. induced pluripotent stem cells
138. An advantage of using the patient's own cells is the:
Answer: B. lower risk of rejection and no ethical concern of destroying embryos
139. Pluripotent cells can:
Answer: C. turn into almost any cell type
140. One risk of the technique is:
Answer: B. cancer from viral vectors or overgrowth of transplanted cells
141. After DNA replication in the S phase the number of chromatids is:
Answer: C. 8
142. At the end of mitosis each daughter cell has:
Answer: B. 4 chromosomes
143. At the end of meiosis the gametes have:
Answer: B. 2 chromosomes
144. Number of daughter cells produced by meiosis of one cell is:
Answer: C. 4
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.