Kidney secretes an enzyme, which changes plasma protein angiotensinogen into angiotensin. The enzyme is

• Renin

• Nitrogenase

• Hydrolase

• Mono-oxygenase

Red blood cells (RBCs) have

• no nucleus, no mitochondria and no endoplasmic reticulum

• nucleus, mitochondria and endoplasmic reticulum

• nucleus, mitochondria but no endoplasmic reticulum

• no mitochondria but endoplasmic reticulum is present

Colour vision in human eyes is the function of photoreceptor cells named

• Rods

• Cones

• Blind spot

• Fovea

Which one of the following statements is NOT correct?

• All proteins are enzymes

• Mostly enzymes arc proteins

• All fats are energy rich compounds

• Glucose is a common carbohydrate

Sugarcane is one of the important cash crops in India. It is grown to obtain

• Starch

• Glucose

• Fructose

• Sucrose

The colourful part of the Sunflower or Marigold plant is

• Flower

• Inflorescence

• Fruit

• Seed

47.

Which of the following statements about DNA is/are correct?

1. DNA is the hereditary material of all living organisms.
2. All segments of DNA code for synthesis of proteins.
3. Nuclear DNA is double helical with two nucleotide chains which run anti-parallel.
4. DNA is also found in mitochondria.

Select the correct answer using the code given below:

• 1, 2 and 3 only

• 3 and 4 only

• 1, 3 and 4 only

• 4 only

To prevent heart problems, blood of a normal healthy person should have

1. low cholestrol level
2. high HDL level
3. high VLDL level
4. high LDL level

Select the correct answer using the code given below:

• 1 and 2 only

• 1,2 and 4 only

• 3 and 4 only

• 1,2 and 3 only

Which of the following pairs of vector and disease is/ are correctly matched?

1. Anopheles : Malaria
2. Aedes aegypti : Chikungunya
3. Tsetse fly : Filariasis
4. Bed bugs : Sleeping sickness

Select the correct answer using the code given below:

• 1,2 and 3 only

• 1 and 2 only

• 1 and 4 only

• 2 only

Consider the following statements:

1. All Echinoderms are not marine.
2. Sponges are exclusively marine.
3. Insects are found in all kinds of habitats.
4. Many primates are arboreal.

Which of the statements given above is/are correct?

• 1,3 and 4 only

• 3 and 4 only

• 2 and 4 only

• 3 only