Practice Questions

TLS Online TPP Program

#Question id: 933

Industrially, nitrogen for use in fertilizers is converted to ammonia by ________.

#Unit 1. Molecules and their Interaction Relevant to Biology

a simple, energy efficient reaction of N2 with water
a cryogenic (very low temperature) process between N2 and H2
special catalysts which drive the reduction of N2 by H2
a reaction between nitric acid and hydrogen gas

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TLS Online TPP Program

#Question id: 12488

#Unit 8. Inheritance Biology

Retinoblastoma usually occurs as a sporadic event but in around 10% of cases there is a positive family history due to autosomal dominant inheritance. In these families the penetrance is approximately 80% (= 0.8). A woman with retinoblastoma, whose father and grandfather were also affected, has an unaffected partner with no relevant family history. Which of the following is correct regarding their children?

TLS Online TPP Program

#Question id: 33522

#Unit 2. Cellular Organization

Alignment of two entire genome sequences and comparison of the locations of orthologs is done by

TLS Online TPP Program

#Question id: 1242

#Unit 4. Cell Communication and Cell Signaling

Rhodopsin, a light-sensitive GPCR whose role in vision is dependent on its phosphorylation status, is influenced in part by the protein arrestin. Which of the following is TRUE with regard to rhodopsin and vision?

TLS Online TPP Program

#Question id: 23125

#Unit 2. Cellular Organization

Which of the following organism are known for bimodal distribution of the gene

TLS Online TPP Program

#Question id: 3421

#Unit 11. Evolution and Behavior

Following figure show fitness variation the presence of natural selection and frequency of genotype before natural selection. What will be effect on the frequency of phenotype? (Y axis- Frequency of genotype, X axis – phenotype)