Tag: zoology

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Questions Related to zoology

Multiple choice zoology musculo-skeletal system red and white muscle types of muscle fibres locomotion and movements

Red muscles have abundant

  1. Lactic acid and acetic acid

  2. Glucose and haemoglobin

  3. Relaxin and myosin

  4. Myoglobin and cytochrome

  5. None of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
  • Muscle is a  bundle of fibrous tissue in a body that has the ability to contract, producing movement in or maintaining the position of parts of the body.
  • Muscles appear in red color due to a pigment called myoglobin. Myoglobin receives oxygen from the red blood cells and transports it to the mitochondria of muscle cells, where the oxygen is used in cellular respiration to produce energy.
  • Cytochrome is a protein associated with the inner membrane of mitochondria. As the number of mitochondria is abundant in red fibers thus represents the abundance of cytochrome in red muscles. 
  • Hence red muscles are rich in myoglobin and cytochrome.
  • So, the correct answer is 'Myoglobin and cytochrome'.
Multiple choice zoology musculo-skeletal system red and white muscle types of muscle fibres locomotion and movements

Mitochondria are more in

  1. Striated muscles

  2. Cardiac muscles

  3. Smooth muscles

  4. All of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
  • Cardiac muscles are the muscles of the heart. They have striated appearance and are involuntary in nature.
  • Each heart cell has about 5000 mitochondria i.e far more mitochondria than any other organ in the body!
  • Mitochondria are more in cardiac muscles because the constantly-beating heart works harder than any other organ in your body and thus requires more amount of energy.
  • So, the correct answer is 'Cardiac muscles.
Multiple choice zoology musculo-skeletal system red and white muscle types of muscle fibres locomotion and movements

Sarcolemma is the outer membrane of ______________.

  1. Muscle fibre

  2. Cartilage

  3. Nerve fibre

  4. Collagen fibre
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

  • Sarcolemma is the cell membrane of a striated muscle fiber cell.
  •  It is the outer layer of a striated muscle fibre
  •  It consists of a lipid bilayer and a thin outer coat of polysaccharide material (glycocalyx) that contacts the basement membrane. Hence, Sarcolemma is the outer membrane of muscle fibre.
So, the correct answer is 'muscle fibre'.

Multiple choice zoology musculo-skeletal system red and white muscle types of muscle fibres locomotion and movements

The white fibers are chemically composed of ______

  1. Myosin

  2. Elastin

  3. Collagen

  4. Actin
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
  • White fibers appear white in color because They have lower myoglobin and therefore lower oxygen content, which is why they do not appear reddish.
  • White fibers are made up of collagen whereas yellow fibers are made up of elastin.
  • The function of white fibrous tissue is to connect structures of the body together while providing support and shock absorption to the structures. For Example, ligaments, and tendons.
  • Hence The white fibers are chemically composed of Collagen.
  • So, the correct answer is 'Collagen'.
Multiple choice zoology musculo-skeletal system red and white muscle types of muscle fibres locomotion and movements

The flight muscles in an eagle has more of aerobic muscles. These muscles are also called red muscles because they are rich in

  1. Haemoglobin

  2. Sarcoplasmic reticulum

  3. Myoglobin

  4. Globin
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
  • Muscle is a  bundle of fibrous tissue in a body that has the ability to contract, producing movement in or maintaining the position of parts of the body.
  • Muscles appear in red colour due to a pigment called myoglobin. It receives oxygen from the red blood cells and transports it to the mitochondria of muscle cells, where the oxygen is used in cellular respiration to produce energy. Hence they are also called aerobic muscles.
  • Hence the flight muscles in an eagle have more of aerobic muscles. These muscles are also called red muscles because they are rich in myoglobin.
  • So,the correct answer is 'Myoglobin'.
Multiple choice zoology musculo-skeletal system red and white muscle types of muscle fibres locomotion and movements

The striated appearance of a myofibril is due to the distribution pattern of 

  1. Actin and myosin.

  2. Fascides.

  3. Troponin.

  4. Meromyosin.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The myofibril appears striated as they are composed of actin and myosin filaments, repeated in units called sarcomere, which is the basic functional unit of the muscle fiber. The sarcomere is responsible for the striated appearance of muscle.The actin is thin filament and myosin is thick filaments.

A muscle fascicle is a bundle of skeletal muscle fibers surrounded by perimysium.
Troponin is a globular protein complex involved in muscle contraction.It occurs with tropomyosin in the thin filament of muscle fiber.
Meromyosin are subunits of myosin, the thick filament.
Hence, the correct answer is option A.

Multiple choice zoology musculo-skeletal system red and white muscle types of muscle fibres locomotion and movements

Red muscle fibres are rich in

  1. Golgi bodies

  2. Mitochondria

  3. Lysosomes

  4. Ribosomes
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
  • Muscle is a  bundle of fibrous tissue in a body that has the ability to contract, producing movement in or maintaining the position of parts of the body.
  • The total number of muscles in the human body comes in the range of 640-850.
  • Red muscle fibers are rich in mitochondria. The muscle cells are red due to the presence of a protein called myoglobin. The myoglobin provides the oxygen to the mitochondria which in turn generate ATP. Hence red muscle fibers are rich in mitochondria.
  • So, the correct answer is 'Mitochondria'.
Multiple choice zoology musculo-skeletal system red and white muscle types of muscle fibres locomotion and movements

An individual muscle fiber is wrapped by

  1. Sarcomeres

  2. Endomysium

  3. Perimysium

  4. Epimysium
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The outer connection tissue covering of a muscle is the epimysium. Within muscle, there are subdivisions called fascicles. The perimysium surrounds these muscle fascicles. The endomysium is the covering around an individual muscle fibre.

So, the correct option is 'Endomysium'.

Multiple choice zoology musculo-skeletal system red and white muscle types of muscle fibres locomotion and movements

For the given statements X and Y which option is the correct option. Statement X - Red muscle are also called aerobic muscle.
Statement Y - Red muscle possesses large amount of mitochondria which can utilise large amount of oxygen stored in them for ATP production.

  1. Statement X is correct and T is incorrect

  2. Statements X and Y are correct and statement Y is incorrect explanation of

  3. Statement X is incorrect and Y is correct.

  4. Statements X and Y are correct and statement Y is correct explanation for 'X'.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The muscle that is dense with capillaries and is rich in mitochondria and myoglobin has a characteristic red color. Hence the name red muscle.  mitochondria which can utilize a large amount of oxygen stored in them for ATP production. Thus the correct answer is option D.