In the human digestive system, which one among the following is the role of the pancreas?
Secretion of surfactants to break up lipid droplets
Storage and regulated release of bile
Secretion of lipase, amylase and protease
Neutralizing stomach acids
Consider the following statements :
1. DNA replication takes place when chromatin is opened up.
2. Chromatin organises itself into rod-shaped chromosomes before cell division.
3. Both prokaryotes and eukaryotes have the same process for cell division.
Which of the statements given above is/are correct?
1 only
1 and 2 only
1, 2 and 3
3 only
A uniform meter scale of mass 0.24 kg is made of steel. It is kept on two wedges, W₁ and W₂, in a horizontal position. W₁ is at a distance of 0.2 m from one of its ends, while W₂ is at a distance of 0.4 m from the other end. If the force on the scale is N₁ due to W₁ and N₂ due to W₂, then : (take g = 10.0 m s⁻²)
N₁ = 1.6 N and N₂ = 0.8 N
N₁ = 0.8 N and N₂ = 1.6 N
N₁ = 0.6 N and N₂ = 1.8 N
N₁ = 1.8 N and N₂ = 0.6 N
Escape speed from the Earth is close to 11.2 km s⁻¹. On another planet whose radius is half of the Earth's radius and whose mass density is four times that of the Earth, the escape speed in km s⁻¹ will be close to :
11.2
15.8
5.6
7.9