Sample paper 5
Question: 1
A plant that lives in calcium- rich soil is called
A. Calcifuge
B. Calciplant
C. Limnophyte
D. Agarophyte
E. Calcicole
Correct Answer: E. Calcicole
Explanation:
Calcicole is a plant that grows well in calcareous soil (lime-rich soil). Calciphile and calciphyte are the
other terms by which such a plant is referred. Some plants cannot tolerate more calcium so they are
not capable of living in lime-rich soil. Such plants are called calcifuges. Limnophytes are the plants
that grow in marshy conditions and in shallow water. Agarophyte is a sea weed from which agar is
produced.
Question: 2
Highly repeated eukaryotic non-coding DNA sequences that are clustered in heterochromatin
are
A. Mitochondrial DNA
B. Spacer DNA
C. Satellite DNA
D. Single copy DNA
E. Complementary DNA
Correct Answer: C. Satellite DNA
Explanation:
Satellite DNA is a highly repeated eukaryotic non-coding DNA sequence that is clustered in
heterochromatin region of chromosome. Mitochondrial DNA is located in organelles called
mitochondria. Spacer DNA is the sequence of nucleotides that occurs between genes. Single copy
DNA are the nucleotide sequences present once in haploid genome. DNA transcribed from a specific
mRNA through the action of the enzyme reverse transcriptase is called complementary DNA.
Question: 3
Inner mitochondrial membrane has high amounts of
A. Cholesterol
B. Cardiolipin
C. Ergosterol
D. Stigmasterol
E. Galactolipids
Correct Answer: B. Cardiolipin