Energy of the Muscles

Q.

What is the source of energy for muscle contraction?

Q. Which one of the following will not directly affect transpiration?

1. wind speed
   
2. temperature
   
3. chlorophyll content of leaves
4. light
   

Q. ATP provides the energy for muscle contraction by allowing for:

1. An action potential formation in the muscle cell
2. Cross–bridge detachment of myosin from actin
3. Cross–bridge attachment of myosin to actin
4. Release of calcium by sarcoplasmic reticulum

Q. During oxidation within a cell, all the energy contained in respiratory substrate, is

1. Released in single step
2. Released in cell but not utilized in synthesis of ATP
3. Released free into cell
4. Not released free into cell

Q. $2H_{2}O\to 4H^{+}{O}_2+4e^{-}$ Based on the above equation, answer the following questions:
a. Where does this reaction take place in plants?
b. What is the significance of this reaction?

Q.

Name three substances transported by blood?

Q. A cyclic process is occurring in C3 plant, which is light dependent, and needs $O_2$ . This process doesn’t produce energy rather it consumes energy. a. Can you name the given process? b. Is it essential for survival? c. What are the end products of this process? d. Where does it occur?

Q. Immediate energy source for muscle contraction, until depletion is

1. ATP
2. ADP
3. Glucose
4. Lactic acid

Q.

In which compound, energy is stored?

1. NATP

2. NADP

3. ADP

4. ATP

Q.

Discuss the mechanism of photosynthesis.

Q. List the important events and end products of the light reaction?

Q.

ATP in the muscles, is replenished in three ways. Which of the following is not one of them ?

1. By cellular respiration (aerobic respiration)

2. Breakdown of protein

3. From creatine phosphate (anaerobic)

4. By glycolysis from glycogen (anaerobic)

Q. Which of the following acts as phosphagen in vertebrate muscles?

1. Phosphocreatine
2. ATP
3. Phosphoric acid
4. Phosphoarginine

Q. The immediate regeneration of energy after ATP is used for muscle contraction is facilitated by

1. Glucose
2. Glycogen
3. Lactic acid
4. Creatine phosphate

Q. During muscle contraction, actin and myosin form:

1. actomyosin
2. actoplasm
3. plastosine
4. myoplasmn

Q. Which one yields ATP required for muscle contraction?

1. Myoglobin
2. Myosin
3. Creatine phosphate
4. Creatinine phosphate

Q. Assertion: Muscle contracts upon stimulation normally when it is relieved from muscle fatigue.
Reason: The vein which is taking away blood from the muscle transports accumulated lactic acid from the muscle to the liver.

1. Both assertion and reason are true and the reason is not the correct explanation of the assertion.
2. Both assertion and reason are false.
3. Both assertion and reason are true and the reason is the correct explanation of the assertion.
4. Assertion is true but reason is false.

Q. The energy for contraction of muscles come from hydrolysis.

1. ADP
2. AMP
3. ATP
4. Pi

Q. During oxidation within a cell, all the energy contained in respiratory substrate, is

1. Released free into cell
2. Released in cell but not utilized in synthesis of ATP
3. Not released free into cell
4. Released in single step

Q. Which of the following occurs during muscle contraction?

1. Reduction of ATP liberates oxygen
2. Z lines move closer together
3. Muscle fibres lengthen
4. Filaments of myosin slide past filaments of actin.

Q. The immediate source of energy is _________ for muscle contraction.

1. glycogen
2. phosphocreatine
3. ATP
4. lactic acid

Q. For a skeletal muscle to contract, what should happen first?

1. ATP must be completely broken down
2. A nerve must stimulate the muscle
3. A muscle must stimulate a nerve
4. A bone must move

Q.

ATP in the muscles, is replenished in three ways. Which of the following is not one of them ?

1. From creatine phosphate (anaerobic)

2. By glycolysis from glycogen (anaerobic)

3. By cellular respiration (aerobic respiration)

4. Breakdown of protein

Q. ATPase enzyme needed for muscle contraction is located in ______.

1. Myosin
2. Actin
3. Actinin
4. Troponin

Q. Immediate energy source for muscle contraction, until depletion is

1. ATP
2. ADP
3. Creatine Phosphate
4. Glycogen

Q.
If you were to sprint a hundred meters a few hours after lunch, which one of the following stored fuels would you probably tap?

1. Fat stored in the liver
2. Fat stored in adipose tissue
3. Muscle proteins
4. Muscle glycogen

Q. ATP for muscle contraction can be formed by

1. Aerobic respiration
2. Glycolysis
3. Creatine phosphate breakdown
4. All of the above

Q. Blood glucose level is not dependent upon muscle glycogen, because of the absence of

1. Phosphorylase
2. Glucose-6-phosphatase
3. Branching enzyme
4. Aldolase

Q. Rigor mortis is due to

1. Leakage of calcium out of the sarcoplasmic reticulum after death
2. lack of ATP
3. death of the motor neuron
4. loss of electrical potential difference across the sarcolemma.

Q. When muscles contracts

1. Myosin slides past actin
2. Sarcomeres increase in size
3. Calcium is taken up by calcium storage sacs
4. H zone disappears