Conifers differ from grasses in the:

1. production of seeds from ovules

2. lack of xylem tracheids

3. absence of pollen tubes

4. formation of endosperm before fertilization

How many different kinds of gametes will be produced by a plant having the genotype AABbCC?

1. Three

2. Four

3. Nine

4. Two

In maize, hybrid vigour is exploited by:

1. bombarding the protoplast with DNA

2. crossing of two inbred parental lines

3. harvesting seeds from the most productive plants

4. inducing mutations

Which of the following statements regarding mitochondrial membrane is not correct?

Amino acid sequence, in protein synthesis is decided by the sequence of:

1. t-RNA

2. m-RNA

3. c-DNA

4. r-RNA

How many ATP molecules could maximally be generated from one molecule of glucose if the complete oxidation of one mole of glucose to CO₂ and H₂O yields 686 kcal and the useful chemical energy available in the high energy phosphate bond of one mole of ATP is 12 kcal?

An organic substance bound to an enzyme and essential for its activity is called:

Bowman’s glands are found in:

1. olfactory epithelium

2. external auditory canal 

3. cortical nephrons only

4. juxtamedullary nephrons

The bacterium (Clostridium botulinum) that causes botulism is:

1. a facultative anaerobe

2. an obligate anaerobe

3. a facultative aerobic

4. an obligate aerobic

Which one of the following is the correctly matched pair of an endangered animal and a National Park?