- (A) They appear darker than smooth muscles by naked eye.
- (B) Alternating dark and light bands appear on their surface when visualized by naked eye.
- (C) Alternating dark and light bands appear on their surface when visualized via a microscope.
- (D) All of these
Biology Mcqs
- (A) Positive phototropism and negative geotropism
- (B) Negative phototropism and positive geotropism
- (C) Negative tactic movement and positive tropic movement
- (D) Positive geotropism of stem and roots
- (A) A smooth muscle
- (B) A cardiac muscle
- (C) A skeletal muscle.
- (D) All of these
- (A) An enzyme that digest endocuticle during an arthropodal ecdysis
- (B) A newly formed exoskeleton in authropods
- (C) A hormone that regulates moulting in arthropods
- (D) A process that involves moulting
- (A) It permits gaseous exchange
- (B) It contains joints, for the same purpose as present in human skeletal system
- (C) It provides muscle attachment
- (D) Like all the other types of exoskeleton, they lack sensation
- (A) Accunulation of rigid proteins molecules in sarcoplam.
- (B) Unavailability of ATP, which is necessary to break the link between actin and myosin.
- (C) Decrease in body temperature after death.
- (D) Death of tissue due to unavailability of O2.
- (A) CaPO4
- (B) CaCO3
- (C) CaSO4
- (D) SiO2
- (A) Binding sites of actin get attached to the myosin head.
- (B) Troponin uncovers the actin binding sites.
- (C) Tropomyosin gets removed from the binding sites of actin filaments.
- (D) Ca2+ goes back inside sarcoplasmic reticulum.
- (A) Z- lines get closer
- (B) A band becomes short
- (C) 1 band elongates
- (D) There is no change in sarcomere
- (A) Epicuticle
- (B) Procuticle
- (C) Ectocuticle
- (D) None of these
