Sample question paper

During photosynthesis, what happens to carbon dioxide and water as glucose is formed?

1. ACarbon dioxide gains hydrogen, while water loses electrons.
2. BCarbon dioxide loses oxygen, while water gains oxygen.
3. CCarbon dioxide is oxidised, while water is reduced.
4. DBoth carbon dioxide and water undergo reduction.

During urine formation, tubular reabsorption and secretion take place in the kidneys. Which of the following sets correctly indicates both the substances that are reabsorbed in the kidneys?

1. AGlucose and salts
2. BGlucose and starch
3. CGlycogen and salts
4. DGlycogen and starch

In a controlled experiment, the anthers of a mustard plant's flowers were carefully removed in the bud stage before they matured. The bud was covered with a paper bag. What will be the most likely result for these flowers?

1. AThey will still produce seeds and fruit through self-pollination.
2. BThey will attract more insects and produce larger flowers but no fruit.
3. CThey will not produce any seeds or fruits.
4. DThey will produce seeds and fruits that are genetically identical to the parent.

The Vas deferens and the Oviduct are both targets for surgical contraception (Vasectomy and Tubectomy respectively). Analysing the process of reproduction, what common biological event is prevented by blocking both these structures?

1. AThe production of gametes (sperm and egg).
2. BThe implantation of the fertilized egg into the uterine wall.
3. CThe successful meeting and fusion of the male and the female gametes.
4. DThe release of hormones - testosterone and estrogen.

The male gamete of an apple plant has seventeen chromosomes. What is the number of chromosomes in the female gamete and in the cells of the adult plant respectively?

1. A17,17
2. B17,34
3. C34,34
4. D34,51

A fish living in a pond ecosystem feeds on small aquatic insects (larvae). These insect larvae, in turn, feed on green algae and small photosynthetic bacteria. In this specific food chain, what is the trophic level classification of fish?

1. AProducer
2. BPrimary Consumer
3. CSecondary Consumer
4. DTertiary Consumer

Assertion (A): The rate of breathing in aquatic organisms is much lower than in the terrestrial organisms. Reason (R): The amount of oxygen dissolved in water is less as compared to the amount of oxygen in air.

1. ABoth A and R are true, and R is the correct explanation of A.
2. BBoth A and R are true, and R is not the correct explanation of A.
3. CA is true but R is false.
4. DA is false but R is true.

Assertion (A): In an ecosystem, 1% of energy is available for transfer from one trophic level to the next. Reason (R): An average of 10% of the food eaten by organisms is available for flow in the form of chemical energy.

1. ABoth A and R are true, and R is the correct explanation of A.
2. BBoth A and R are true, and R is not the correct explanation of A.
3. CA is true but R is false.
4. DA is false but R is true.