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Which of the following statements are co...

Which of the following statements are correct regarding muscle proteins ?
(i) Actin is a thin filament and is mde up to two F-actin
(ii) The complex protein, tropomyosin is distributed at regular intervals on the troponin
(iii) Myosin is a thick filament which is also a polymerised protein.
(iv) The globular head of meromyosin consists of light meromyosin (LMM).

A

(i) , (ii) and (iii) are correct

B

(i) , (ii) and (iv) are correct

C

(i) and (iii) are correct

D

(ii) and (iv) are correct

Text Solution

Verified by Experts

The correct Answer is:
C
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Read the statements regarding muscle proteins (A) Actin is a thin filament and is made up of two F-actins (B) The complex protein, tropomyosin is distributed at regular intervals on the troponin (C) Myosin is a thick filament which is also a polymerized protein (D) The globular head of mermyosin consists of light meromyosin (LMM) Of the above statements

Which of the following statements regarding the structure of contractile proteins are correct ? I. Each actin filaments is made up of two ' F ' actins, which are wound helically around each other. II. Two types of troponins are distributed at regular intervals on the tropomyosin . III. The globular head of meromyosin has binding sites for ATP and troponins. IV myosin is a structure proteins which also has enzymatic activity.

Which of the following statements are correct regarding secretion oxynthic cells? (i) It denatures proteins and softens fibrous connective tissues in the blood. (ii) It activates rennin. (iii) It has a role in maturation of RBCs. (iv) It activates trypsin.

Which of the following statements about the molecular arrangement of actin and mysin In myofibre is/are incorrect ? (i) Each actin (thin filament) is made of 2F (filamentous) actins. (ii) F-actin is the polymer of G (globular) actin. (iii) 2F0actins are twisted into a helix. (iv) Two strands of tropomyosin (protein) lie in the grooves of F-actin. (v) Troponin molecules (complex proteins) are distributed at regular intervals on the tropomyosin. (vi) Troponin forms the head of the myosin molecule. (vii) The myosin is a polymerised protein.

Which of the following statements is/are not correct regarding connective tissues ? (i) They are most abundant and widely distributed in the body of complex animals (ii) They connect and support other tissues (iii) They include diverse tissues such as bones, cartilage, tendons, adipose and other loose connective tissues. (iv) They form the internal and external lining of many organs (v) In all connective tissues except blood, the cells secrete fibres of structural proteins like collagen and elastin.

Which of the following statements is/are not correct for single cell protein (SCP)? (i) The biomass is obtained from unicellular microorganisms only. (ii) It provides a protein rich supplement. (iii) They can be grown easily on materials like waste water from potato processing plants, straw, manure, sewage, etc. (iv) It helps to minimise environmental pollution. (v) SCP has to be processed before use.

Fill in the blanks with the suitable words Each actin (thin) filament is made of two 'F' (filamentous) actins (a) wound to each other. Each 'F' actin is a polymer of (b) actins. Two filaments of another protein (c) ____also run close to the 'F' actins throughout its length. A complex protein (d) ____ is distributed at regular intervals on the tropomyosin. in the resting state a submit of troponin masks the active binding sites for (e)____ on the (c)____filaments.

Given below are the following statements regarding actin (i) Is the main constituent of light band (ii) Forms the Anisotropic band on its own (iii) Are the thicker filaments (iv) A part of the H zone. Choose the correct option

Which of the following statements regarding single cell protein are true? I. It contains high quality fat and low protein content. II. Fusarium graminearum is a yeast that produces SCP. III. It reduces pressure on agricultural production system. IV. Spirulina is a cyanobacteria which produces SCP.

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