Practice Questions

TLS Online TPP Program

#Question id: 9235

Agricultural lands frequently require nutrient augmentation because ________.

#Unit 9. Diversity of Life Forms

nitrogen-fixing bacteria are not as plentiful in agricultural soils because of the use of pesticides
the nutrients that become the biomass of plants are not cycled back to the soil on lands where they are harvested
land that is available for agriculture tends to be nutrient-poor
cultivation of agricultural land inhibits the decomposition of organic matter

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TLS Online TPP Program

#Question id: 27100

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following statement is correct regarding the α -Turn and β turns

(1)In α - Turn H-bond is seen between i and i + 4 (First and Fifth residue)

(2) In α Turn conformation is based on i + 1 , i + 2 and i + 3 on the basis of this, they are classified

(3)In β turns H-bond is seen between i and i + 4 (First and Fifth residue)

(4) In β turns conformation of i + 1 and i + 2 are crucial and on the basis of this, they are classified

TLS Online TPP Program

#Question id: 2734

#Unit 2. Cellular Organization

Although nucleotides bearing the major purines and pyrimidines are most common, both DNA and RNA also contain some minor bases. In DNA the most common of these are _______________ forms of the major bases; in some viral DNAs, certain bases may be hydroxymethylated or glucosylated.

TLS Online TPP Program

#Question id: 30105

#Unit 1. Molecules and their Interaction Relevant to Biology

Methotrexate is an inhibitor of dihydrofolate reductase. Administration of methotrexate would inhibit:

1. de novo synthesis of UMP.

2. conversion of dUMP to dTMP.

3. conversion of IMP to GMP.

4. de novo synthesis of IMP

TLS Online TPP Program

#Question id: 5783

#Unit 8. Inheritance Biology

Which of the following genetic diseases results from a mutation that prevents a protein from forming?