Practice MCQ Questions and answers on Biology-GK

Plant cells have a cell wall, as well as a cell membrane. In plants, the cell wall surrounds the cell membrane. This gives the plant cell its unique rectangular shape.

Mitochondria produces a usable form of energy for the cell.

Mitochondria is also called as 'power house of the cell'.

Volume of blood found in a healthy person is 5-6 litre.

For emergency transfusions, blood group type O negative blood is the variety of blood that has the lowest risk of causing serious reactions for most people who receive it. Because of this, it's sometimes called the universal blood donor type.

Haemoglobin is an oxygen carrying protein of red colour concentrated in red blood cells.

AB is a universal recipient.

The largest artery in the body is the aorta, which is connected to the heart and extends down into the abdomen.

The heart consists of four chambers in which blood flows. Blood enters the right atrium and passes through the right ventricle. The right ventricle pumps the blood to the lungs where it becomes oxygenated. The oxygenated blood is brought back to the heart by the pulmonary veins which enter the left atrium.

Blood pressure is the pressure that blood exerts on the wall of the blood vessels. This pressure originates in the contraction of the heart, which forces blood out of the heart and into the blood vessels. Two mechanisms take place in the heart: diastole and systole.