Red Muscle Fibre

Q.

Smooth muscles are______.

1. Voluntary, multinucleate, cylindrical

2. Involuntary, cylindrical, multinucleate

3. Voluntary, branched, uninucleate

4. Involuntary, spindle shaped, uninucleated, tapering

Q. The quaternary structure of human haemoglobin is a

1. homogenous dimer
2. homogenous tetramer
3. heterogenous dimer
4. heterogenous tetramer

Q. How does lactic acid accumulation cause muscle fatigue?

Q.

Match the following and select the correct option.

Column – I Column – ll

A. Fast muscle fibers (i) Myoglobin

B. Slow muscle fibers (ii) Lactic acid

C. Actin filament (iii) Contractile unit

D. Sarcomere (iv) l-band

1. A-(ii), B-(i), C-(iii), D-(iv)

2. A-(i) B-(ii), C-(iv), D-(iii)

3. A-(ii), B-(i), C-(iv), D-(iii)

4. A-(iii), B-(ii), C-(iv), D-(i)

Q. During skeletal muscle contractions following events can occur:
I. I-band shortens
II. A-band shortens
III. H-zone shortens
IV. Sarcomere contract
V. ATP changes to ADP and Pi
Choose the option with incorrect events.

1. Only I
2. Only III
3. IV and V
4. Only II

Q.

What are red fibres?

Q.

Match the following columns.

$\begin{array}{cc}\text{Column I}& \text{Column II}\\ A.\text{Fast muscle fibres}& 1.\text{Myoglobin}\\ B.\text{Slow muscle fibres}& 2.\text{Lactic acid}\\ C.\text{Actin filament}& 3.\text{Contractile unit}\\ D.\text{Sarcomere}& 4.I-band\end{array}$

Codes

A B C D

(a) 1 2 4 3

(b) 2 1 3 4

(c) 2 1 4 3

(d) 3 2 4 1

Q.

Myoglobin is

i.An iron- and oxygen-binding protein

ii. found mainly in muscle tissue.

iii. same as hemoglobin

iv. Myoglobin is a monomeric heme

1. only ii) is correct.

2. only i) and ii) are correct.

3. only i) and iii) are correct.

4. all statements are correct.

Q. Match the following
$\begin{array}{cc}\text{1) Striated Muscle}& \text{i. Thick filament}\\ \text{2) Red Muscle}& \text{ii. Thin filament}\\ \text{3) Troponin}& \text{iii. Voluntary}\\ \text{4) Myosin}& \text{iv. Myoglobin}\end{array}$

1. 1-ii, 2-iv, 3-i, 4-iii
2. 1-iii, 2-iv, 3-ii, 4-i
3. 1-iv, 2-iii, 3-i, 4-ii
4. 1-iii, 2-iv, 3-i, 4-ii

Q.

Slow twitch fibers have

1. Small diameter

2. Burst of power

3. More myoglobin

4. Fewer mitochondria

Q. Integral of:[|x|] limit from 1 to 2

Q. ATPase of the muscle is located in:

1. actinin
2. troponin
3. myosin
4. actin

Q. Which of the following is not true for red fibres?

1. They are also called aerobic muscles
2. High number of sarcoplasmic reticulum
3. Contains red, oxygen storing pigment
4. Large number of mitochondria

Q. The respiratory pigment present in the RBC of vertebrate blood is called

1. Haemoglobin
2. Haematin
3. Haematochrome
4. Erythrocyanin

Q. Source of $C{a}^{2+}$ for muscle contraction is both sarcoplasmic (endoplasmic) reticulum as well as extracellular fluid in case of
a. Skeletal muscles
b. Smooth muscles
c. cardiac muscles

1. a and c only
2. b and c only
3. a only
4. b only

Q.

Myoglobin is

i.An iron- and oxygen-binding protein

ii. found mainly in muscle tissue.

iii. same as hemoglobin

iv. Myoglobin is a monomeric heme

1. only ii) is correct.

2. i) and ii) are correct.

3. i), ii) and iv) are correct.

4. all statements are correct.

Q.

Lance Armstrong is a seven-time winner of Tour de France, which is a bicycle race that covers between 3500 to 4000 kilometers. What type of muscle fiber probably predominates in the legs of bicyclists, who compete in this annual event?

1. Red fibers

2. White fibers

3. Intermediate fibers

4. Inelastic fibers

Q. State whether the following statements are true or false.
H-zone of striated muscle fibre represents both thick and thin filaments.

1. True
2. False

Q. Which of the following is not true for red fibres?

1. Contains red, oxygen storing pigment
2. Large number of mitochondria
3. They are also called aerobic muscles
4. High number of sarcoplasmic reticulum

Q. State whether the following statements are true or false.
Cross bridges pull the actin chain as the myosin heads return to their unenergized conformation.

1. True
2. False

Q. ........... element is common in haemoglobin and myoglobin.

1. Fe
2. Cu
3. Mn
4. Mg

Q. In mammalian RBC, the percentage of haemoglobin is

1. 90% of biomass
2. 40% of biomass
3. 50% of biomass
4. 34% of biomass

Q. Human RBC has

1. A nucleus
2. No nucleus
3. More than one nucleus
4. None of the above

Q.

Lance Armstrong is a seven-time winner of Tour de France, which is a bicycle race that covers between 3500 to 4000 kilometers. What type of muscle fiber probably predominates in the legs of bicyclists, who compete in this annual event?

1. Red fibers

2. Inelastic fibers

3. Intermediate fibers

4. White fibers

Q. Myoglobin is present in.

1. all muscle fibres
2. white muscle fibres
3. red muscle fibres
4. none of these

Q. What do you mean by haemoglobin?

Q. Which of the following proteins has an impact on the regulation of internal movements?

1. All of the above
2. Actin
3. Tropomyosin
4. Myosin

Q. Which one of the following substances in the blood in man imparts the oxygen carrying capacity to it?

1. Haemocyanin
2. Sodium ions
3. Haemoglobin
4. Haemoerythrin

Q. Immediate source of energy for muscle contraction is

1. Glucose
2. Creatine phosphate
3. ATP
4. GTP