CBSE Class X – Science Biology Exam ( Full Syllabus)

Hormones and enzymes are proteins, and the formation of any specific protein is controlled by a particular gene. Fat biosynthesis occurs through metabolic reaction.

The size of the body is an acquired trait because it depends on nutritional status, health conditions, etc. It can change depending on the Components like availability of less or more food.

Tall plants having round seeds as well as dwarf plants with wrinkled seeds. There were also new combinations like tall plants with wrinkled seeds and dwarf plants with round seeds in the F2 progeny.

The cross between RR yy and rr YY seeds will obtain RrYy ofspring which will exhibit round and yellow phenotype, as these traits are the dominant ones.

The tendril of a pea plant and the phylloclade of Opuntia are homologous structures, as they are modifed stems but serve diferent functions in diferent plants.

only one parent is involved in the Asexual reproduction ,there is no fusion of male and female gamates.

formation of single cell during sexual reproduction by fusion of nuclei of male and female gamates.

After the pollen lands on a suitable stigma, a tube grows out of the pollen grain and travels through the style to reach the female ovary.

Reproduction is one of the important characteristic function of living things. it is essential for the continuity of species for generations to continue.

Bisexual flowers contains both reproductive organs, male & female.

Bile is secreted by the liver and is stored in the gall bladder from where it enters the small intestine via a common duct.

Rice water contains starch, hence when iodine solution is added to rice water it turns blue-black.

Pancreas secretes pancreatic Juice which contains trypsin, lipase and pancreatic amylase. Trypsin digests the proteins, lipase breaks down the fat droplets already emulsifed by bile salts and pancreatic amylase breaks down the starch.

Amylase is the enzyme which helps in primary digestion of starch only.Digestion of starch by salivary amylase into maltose starts in mouth. Oesophagus then pushes the food into stomach.

The oxygen during photosynthesis comes from split water.

Xylem tissues include tracheids, vessels, fbres and parenchyma and serve in the ascent of sap/water and minerals.