Mitochondria, ribosomes, plastids, microbodies
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See all →- From the statements given below choose the correct option :A. The eukaryotic ribosomes are 80S and prokaryotic ribosomes are 70S.B. Each ribosome has two sub-units.C. The two sub-units of 80S ribosome are 60S and 40S while that of 70S are 50S and 30S… Answer: 1. A, B, C are true Key idea: Eukaryotic ribosomes are 80S, made of 60S and 40S subunits. Prokaryotic ribosomes are 70S, made of 50S... 1
- Given below are two statements :Statement I : Mitochondria and chloroplasts are both double membrane bound organelles.Statement II : Inner membrane of mitochondria is relatively less permeable, as compared to chloroplast.In the light of the above sta… Answer: 4. Statement I is correct but Statement II is incorrect. Key idea: both organelles are bounded by two membranes, and in both the inn... 1
- The DNA present in chloroplast is: Answer: 3. Circular, double stranded Key idea: chloroplast DNA is like bacterial DNA. It is circular and double stranded, and lies in the st... 1
- Match List I with List IIList I: A. Nucleolus; B. Centriole; C. Leucoplasts; D. Golgi apparatusList II: I. Site of formation of glycolipid; II. Organization like the cartwheel; III. Site for active ribosomal RNA synthesis; IV. For storing nutrientsCh… Answer: 2. A-III, B-II, C-IV, D-I Key idea: match each organelle with its function or structure. Nucleolus: site of active rRNA synthesis (I... 1
- How many different proteins does the ribosome consist of? Answer: 2. 80 Key idea: A ribosome is made of rRNA and about 80 different proteins. This is the figure used in NCERT, so the answer is 80. O... 1
- Match List - I with List - II.List - I | List - II(a) Cristae | (i) Primary constriction in chromosome(b) Thylakoids | (ii) Disc-shaped sacs in Golgi apparatus(c) Centromere | (iii) Infoldings in mitochondria(d) Cisternae | (iv) Flattened membranous… Answer: 3. (a)-(iii), (b)-(iv), (c)-(i), (d)-(ii) Match each structure with its description: Cristae are infoldings of the inner mitochondri... 1