FBISE Class 9th (SSC-l)
Explore subjects and practice MCQs
3
Chapters
1,610
Total MCQs
FBISE Class 9th (SSC-l)
Answer: Chlorophyll, present in chloroplasts, gives leaves their green color and captures light energy.
Answer: Leucoplasts are storage plastids found in non-green parts of plants.
Answer: Chromoplasts contain pigments other than chlorophyll and give color to flowers and fruits.
Answer: Chloroplasts carry out photosynthesis using light, water, and carbon dioxide.
Answer: A chloroplast has an outer and an inner membrane surrounding the stroma and thylakoids.
Answer: Centrioles are found in animal cells but are generally absent in higher plant cells.
Answer: Centrioles organize the spindle apparatus that separates chromosomes during cell division.
Answer: The cytoskeleton maintains the shape of the cell and supports its organelles.
Answer: The cytoskeleton is built from microtubules, microfilaments, and intermediate filaments.
Answer: Along with support, the cytoskeleton assists in cell movement and the movement of materials within the cell.
Answer: The cell cycle includes all the events that occur in a cell from one division to the next, including interphase and the mitotic phase.
Answer: The cell cycle is divided into interphase, where the cell prepares to divide, and the mitotic phase, where division occurs.
Answer: Interphase consists of the G1 (first gap), S (synthesis) and G2 (second gap) phases during which the cell grows and prepares for division.
Answer: In the S (synthesis) phase, the DNA of each chromosome is duplicated so that each chromosome consists of two sister chromatids.
Answer: The G1 phase is typically the longest phase of interphase because the cell grows rapidly and synthesizes proteins and organelles.
Answer: The S phase is called the synthesis phase because DNA is synthesized (replicated) during this phase.
Answer: During the G2 phase, the cell synthesizes proteins and other materials needed for division, such as tubulin for spindle fibers.
Answer: After a cell divides, it enters the G1 phase of interphase, where it grows before starting DNA replication.
Answer: G2 is the last phase of interphase; after G2 the cell enters mitosis.
Answer: Cells in G0 are metabolically active but have exited the cell cycle and do not divide, e.g., mature nerve cells.