Description : In biological studies which of the following is used to refer to the oxygen-binding, iron-containing, conjugated protein complex present in the sarcoplasm of muscle cells? a) myelin b) myosin c) myoglobin d) none of these
Last Answer : ANSWER: C -- MYOGLOBIN
Description : A protein having both structural and enzymatic traits is (A) Myosin (B) Collagen (C) Trypsin (D) Actin
Last Answer : Answer : A
Description : The protein present in the finger nail is (1) Actin (2) Myosin (3) Globin (4) Keratin
Last Answer : (4) Keratin Explanation: Keratin is a fibrous protein making up most cells found in our nails and hair and the epidermis layer of our skin. It also makes up fish scales and crustacean shells, bird feathers and beaks, and animal horns and hooves.
Description : Microtubules consist of helically stacked molecules of the protein (A) Actin (B) Myosin (C) Keratin (D) Tubulin
Last Answer : (D) Tubulin
Last Answer : Keratin
Description : The microfilaments composed of (A) Actin protein (B) Gelatin protein (C) Keratin protein (D) Tubulin protein
Last Answer : (A) Actin protein
Description : Which of the following structures will not be common to mitotic cell of a higher plant? (a) Centriole (b) Spindle fibre (c) Cell plate (d) Centromere
Last Answer : (a) Centriole
Description : What are the components of the mitotic spindle?
Last Answer : •The mitotic spindle is an apparatus of microtubules that controls chromosome movement during mitosis •During prophase, assembly of spindle microtubules begins in the centrosome, the microtubule organizing center
Description : What are the components of the mitotic spindle? What is the source of these components?
Last Answer : •The mitotic spindle is an apparatus of microtubules that controls chromosome movement during mitosis
Description : The number of thick myofilaments (myosin) surrounding Single thin myofilament (actin) are
Last Answer : The number of thick myofilaments (myosin) surrounding Single thin myofilament (actin) are A. 3 B. 6 C. 2 D. 4
Description : Myosin bridges can be prevented from combining actin by two regulator proteins in resting muscle by (a) troponin (b) myofibril (c) troponin and tropomyosin (d) natural inhibiting proteins
Last Answer : Ans:(c)
Description : The H-disk in the skeletal muscle fibre is due to (a) the absence of myofibrils in the central portion of Aband (b) the central gap between myosin filaments in the Aband Questions (c) the ... myosin filaments in the A-band (d) birefringence of myosin filaments in the central portion of A-band
Description : The contractile proteins in a muscle are (1) Actin and Myosin (2) Actin and Tropomyosin (3) Myosin and Troponin (4)Troponin and Tropomyosin
Last Answer : (1) Actin and Myosin Explanation: Muscle fibers or myofibrils are formed of three types of proteins which are (1) contractile, (2) regulatory, and (3) structural. Contractile proteins are the force ... are Actin which is part of thin filament and Myosin, which is part of the thick filament.
Description : In the skeletal muscle: a. myosin is found in the thick filament b. the thin filament contains actin and troponin c. during stimulus excitation calcium ions are derived from the serum d. tropomyosin masks the myosin-combining sites on the actin
Last Answer : tropomyosin masks the myosin-combining sites on the actin
Description : The following are true about the smooth muscle cells: a. presence of a striated appearance b. do not contain actin and myosin c. spontaneous muscle contraction d. mitochondria are absent
Last Answer : spontaneous muscle contraction
Description : With reference to the skeletal muscle myofilaments a. actin is the major constituent of thin filaments b. myosin and tropomyosin combine to form the thick filaments c. troponin is a constituents of thin filaments d. tropomyosin prevents the interaction of actin and myosin in the resting state
Last Answer : actin is the major constituent of thin filaments
Description : Which one of the following is the correct matching of three items and their grouping category? Items Group (a) Ilium, ischium, Coxal bones of pelvic girdle pubis (b) Actin, myosin, Muscle proteins rhodopsin (c) Cytosine, uracil, Pyrimidines thiamine (d) Malleus, incus, Ear ossicles cochlea
Last Answer : (a) Ilium, ischium, Coxal bones of pelvic girdle pubis
Description : The H-zone in the skeletal muscle fibre is due to (a) the central gap between actin filaments extending through myosin filaments in the A-band (b) extension of myosin filaments in the central portion ... the central portion of A-band (d) the central gap between myosin filaments in the A-band.
Last Answer : (a) the central gap between actin filaments extending through myosin filaments in the A-band
Description : Sliding filament theory can be best explained as (a) actin and myosin filaments do not shorten but rather slide pass each other (b) when myofilaments slide pass each other, myosin filaments shorten ... filaments do not shorten (d) actin and myosin filaments shorten and slide pass each other.
Last Answer : (a) actin and myosin filaments do not shorten but rather slide pass each other
Description : Calcium is important in skeletal muscle contraction because it (a) binds to troponin to remove the masking of active sites on actin for myosin (b) activates the myosin ATPase by binding to it ... filament (d) prevents the formation of bonds between the myosin cross bridges and the actin filament.
Last Answer : (a) binds to troponin to remove the masking of active sites on actin for myosin
Description : Calcium is important in skeletal muscle contraction because it :- (1) binds to troponin to remove the masking of active sites on actin for myosin. (2) activates the myosin ATPase by binding to ... filament. (4) prevents the formation of bonds between the myosin cross bridges and the actin filament.
Last Answer : (1) binds to troponin to remove the masking of active sites on actin for myosin.
Description : The phase of contraction of a muscle occurs when: a) tropomyosin binds and releases actin b) myosin binds and releases actin c) actin binds and releases myosin d) none of the above
Last Answer : ANSWER: B -- MYOSIN BINDS AND RELEASES ACTIN
Description : The major fibrous proteins are: a) peptone and edestin b) glutelin and leucine c) valine and lysine d) myosin and actin
Last Answer : ANSWER: D -- Myosin and Actin
Description : The organic portion of bone consists of which one of the following proteins. a) fibrin b) collagen c) actin d) myosin
Last Answer : ANSWER: B -- COLLAGEN
Description : The myofilaments of muscles consist primarily of two proteins. These two proteins are called: a) actin and myosin b) progesterone and testosterone c) progesterone and estrogen
Last Answer : ANSWER: A -- ACTIN AND MYOSIN
Description : The contractile proteins in a muscle are (1) Actin and Myosin (2) Actin and Tropomyosin (3) Myosin and Troponin (4) Troponin and Tropomyosin
Last Answer : Actin and Myosin
Description : Protein which renders a cell less susceptible to attack by viruses is called - (1) Actomyosin (2) Chloromycetin (3) Hybridoma (4) Inferon
Last Answer : (4) Inferon Explanation: Interferons are proteins which render the cells less susceptible to attack by viruses. Interferons are proteins made and released by host cells in response to the presence of pathogens such as viruses, bacteria, parasites or tumor cells.
Description : Protein which renders a cell less susceptible to attack by viruses is called— (1) Actomyosin (2) Chloromycetin (3) Hybridoma (4) Inferon
Last Answer : Inferon
Description : The following protein/polypeptide has a quaternary structure : (A) cc-Chymotrypsin (B) Hemoglobin (C) Insulin (D) Myoglobin
Last Answer : (B) Hemoglobin
Description : Vitamin B2 is associated with formation of (a) Actomyosin (b) FMN & FAD (c) Fibrinogen (d) Acetylcholine
Last Answer : (b) FMN & FAD
Description : The protein present in hair is (A) Keratin (B) Elastin (C) Myosin (D) Tropocollagen
Description : Match the following: Product Protein A Milk (i) keratin B Egg (ii) Myosin C Meat (iii) Casein D Wool (iv) Albumen
Last Answer : (c) A-iii, B-iv, C-ii, D-i
Description : Which of the following is the contractile protein of a muscle? (a) Tropomyosin (b) Tubulin (c) Myosin (d) All of these
Last Answer : (c) Myosin
Description : The contractile protein of skeletal muscle involving ATPase activity is (a) troponin (b) tropomyosin (c) myosin (d) α-actinin.
Last Answer : (c) myosin
Description : Myosin is one of two proteins that make up the myofibrils of striated muscles. Name the other protein.
Last Answer : ANSWER: Actin
Description : Genes are packaged into a bacterial chromosome by (a) acidic protein (b) actin (c) histones (d) basic protein.
Last Answer : basic protein
Description : Macrophages are professional antigen- presenting cells. The protein molecule through which theypresent antigen in human is A.actin B.interleukin C.HLA D.CD8
Last Answer : D.CD8
Description : Macrophages are professional antigen- presenting cells. The protein molecule through whichthey present antigen in human is A- actin B- nterleukin C- HLA D- .CD8
Last Answer : .CD8
Description : What is Myoglobin ?
Last Answer : Myoglobin is a type of protein linked by iron and oxygen. It is most commonly found in the fleshy muscle cells of vertebrates. It is related to hemoglobin.
Description : Myoglobin is present in
Last Answer : Myoglobin is present in A. White muscle fibers B. Red muscle fibers C. Involuntary muscles D. All the above
Description : Iron is stored in the form of (A) Ferritin and transferrin (B) Transferrin and haemosiderin (C) Haemoglobin and myoglobin (D) Ferritin and haemosiderin
Last Answer : Answer : D
Description : Each myoglobin molecule contains (A) One iron atom (B) Two iron atoms (C) Four iron atoms (D) Six iron atoms
Description : About 5% of the total body, iron is present in (A) Transferrin (B) Myoglobin (C) Cytochromes (D) Haemosiderin
Last Answer : Answer : B
Description : Sigmoidal oxygen dissociation curve is a property of (A) Haemoglobin (B) Carboxyhaemoglobin (C) Myoglobin (D) Methaemoglobin
Description : The red colour of human blood is due to (1) myoglobin (2) hemoglobin (3) immunoglobulin (4) haptoglobin
Last Answer : (2) hemoglobin Explanation: Hemoglobin is the ironcontaining oxygen-transport metalloprotein in the red blood cells of all vertebrates which carries oxygen from the respiratory organs to the rest of the body. It ... oxygen than had in the vein the blood' came from. Therefore, the blood turns red.
Description : Mast cells secrete (a) haemoglobin (b) hippurin (c) myoglobin (d) histamine
Last Answer : (d) histamine.
Description : Both Haemoglobin and myoglobin require _______ for formation —
Last Answer : Iron
Last Answer : hemoglobin
Description : Cell wall is mainly composed of -Science
Last Answer : The cell wall is composed of a network of cellulose microfibrils and cross-linking glycans embedded in a highly cross-linked matrix of pectin polysaccharides. In secondary cell walls, lignin may be deposited.