Biology

Which of the following statements about fractures in old age is incorrect?

Options:

• A. They are more common than in adult age.
• B. Occur as a result of bone being thin and weak.
• C. Due to good blood supply it results in quick healing.
• D. It involves osteoblasts and osteocytes.

View Answer

C. Due to good blood supply it results in quick healing.

A smallest contractile unit of muscle contraction called sarcomere is the area between two:

Options:

• A. H- zone
• B. M- Line
• C. Z- Line
• D. A band

View Answer

C. Z- Line

Tetany is caused by__________?

Options:

• A. Hypocalcemia
• B. Hypercalcemia
• C. Clostridum tetani.
• D. Low O2 level

View Answer

A. Hypocalcemia

Among the following organisms which shows the best adaptations for locomotion?

Options:

• A. Amoeba.
• B. Earthworm.
• C. Reptiles
• D. Amphibians.

View Answer

C. Reptiles

The pressure generated when water enters & inflates plant cells is called ___________ potential?

Options:

• A. Water
• B. Osmotic
• C. Pressure
• D. Solute

View Answer

C. Pressure

Tricuspid valve is present_____________?

Options:

• A. Between right atrium and right ventricle
• B. Between left atrium and left ventricle
• C. At base of pulmonary artery
• D. At base of aorta

View Answer

A. Between right atrium and right ventricle

Which of the following is present inside the vertebral column______________?

Options:

• A. Brain
• B. Spinal cord
• C. Both of these
• D. none of these.

View Answer

B. Spinal cord

Which of the following is a compensation point:

Options:

• A. Leaves respire and utilize O2 and release CO2.
• B. Photosynthesis and respiration occur at same rate. So there is not net exchange of gases between atmosphere and plants.
• C. Rate of photosynthesis increases, so do the O2 production, with a net release of oxygen coupled with the uptake of CO2.
• D. Rate of respiration becomes more than rate of photosynthesis.

View Answer

B. Photosynthesis and respiration occur at same rate. So there is not net exchange of gases between atmosphere and plants.

First Actions spectrum was obtained by using__________?

Options:

• A. Algae
• B. Fungi
• C. Bacteria
• D. Spirogyra

View Answer

D. Spirogyra

Chlorophylls are found embedded in the __________ membranes?

Options:

• A. Stroma
• B. Grana
• C. Thylakoid
• D. Intergrana

View Answer

C. Thylakoid