Biology Today — May 2017

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CHAPTER-6 : ANATOMY OF FLOWERING PLANTS Multiple Choice Questions Which of the following is not the part of stele? (a) Pericycl ...

Match Column I with Column II. (There can be more than one match for items in Column I). Column I Column II A. Exarch xylem (i) ...

Pseudostratified ciliated columnar epithelium is found in (a) trachea (b) olfactory mucosa (c) bronchi (d) both (a) and (c). Wh ...

Figure Based Questions Refer to the given figure of various human blood corpuscles and answer the following questions. ABCD (a ...

rapid growth of the stem to form a cavity called protoxylem cavity or lacuna. (a) The balloon like structures ‘X’ represent tyl ...

31 FACTS HGH YIELD Class XI Analysis of various PMTs from 2012-2016 2012 2013 2014 2015 2016 AIPMT/NEET 6 3 4 4 8 AIIMS 1 ...

Functions • Synthesise and store ATPs by oxidation of respiratory substrates i.e., carbohydrates, proteins and fats. • Its ...

• Their size varies in different species. Chloroplasts of higher plants are 4-10 μm in length and 2-4 μm in breadth. • Chl ...

• Each ribosome consists of one larger and one smaller subunit. • The smaller subunit fits over larger one and requires Mg ...

CYTOSKELETAL STRUCTURES • They are minute, fibrous and tubular structures that form the structural framework inside the cell ...

Flagellar sheath Outer side arm Inner side arm B B B B B B B B B Matrix Transition junction Fig.: Ultrastructure of flagellum Ce ...

9 Triplets Centriole Centrosphere Fig.: Centrosome with pair of centrioles (Diplosome) Centriole Massule or pericentriolar satel ...

Nucleus Nuclear envelope • Separates nucleus from cytoplasm. It is made up of two lipoprotein and trilaminar membranes, each ...

• It controls the synthesis of RNAs (mRNA, rRNA, tRNA), enzymes and structural proteins. • It directs cell differentiation ...

Functions • Contain genes hence, transmit genetic information. • Control synthesis of proteins, enzymes, hence regulate ce ...

(a) At higher concentration of Mg2+, ribosomal subunits get separated. (b) Mg2+ is required for binding two subunits of ribosome ...

A system of classifying living and extinct organisms in the historical order in which they have evolved from common ancestors, ...

Match the following and select the correct option. Column I Column II A. Red rot of sugarcane (i) Alternaria B. Soft rot of ap ...

Select the mismatched pair. (a) Order - Primata (b) Genus - Mangifera (c) Class - Poales (d) Family - Canidae Complete the foll ...