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TLS Online TPP Program

#Question id: 27383

Choose the correct statement related to the atomic size Cl and Mg

#Unit 1. Molecules and their Interaction Relevant to Biology

  1. Mg has a bigger size than Cl due to effective nuclear charge

  2. Mg has a smaller size than Cl due to effective nuclear charge

  3. Mg and Cl have equal size due to effective nuclear charge

  4. effective nuclear charge has nothing to do with size 

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TLS Online TPP Program

#Question id: 6949

#Unit 5. Developmental Biology

During gastrulation in Xenopus, the future mesoderm and endoderm move inside the embryo through the "blastopore"; in contrast, in chickens, gastrulation involves cells moving inward through the:
TLS Online TPP Program

#Question id: 15149

#Unit 8. Inheritance Biology

In this problem we will explore some of the many ways that mutations in two different genes can interact to produce different Mendelian ratios. Consider a hypothetical insect species that has red eyes. Imagine mutations in two different unlinked genes that can, in certain combinations, block the formation of red eye pigment yielding mutants with white eyes. In principle, there are two different possible arrangements for two biochemical steps responsible for the formation of red eye pigment. The two genes might act in series such that a mutation in either gene would block the formation of red pigment. Alternatively, the two genes could act in parallel such that mutations in both genes would be required to block the formation of red pigment.
Further complexity arises from the possibility that mutations in either gene that lead to a block in enzymatic activity could be either dominant or recessive. If the crosses is made between a wild type insect with red eyes and a true breeding white eyed strain with mutations in both genes. Such considerations yield the Pathways in series with recessive mutations in both genes, what will be the phenotype in F1 progeny?
TLS Online TPP Program

#Question id: 334

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following statements about hydrogen bonding is not true?
TLS Online TPP Program

#Question id: 8908

#Unit 9. Diversity of Life Forms

According to one hypothesis, the jaws of vertebrates were derived by the modification of
TLS Online TPP Program

#Question id: 23146

#Unit 13. Methods in Biology

A phenomenon of absorption of light at a certain wavelength and then emission at longer wavelength is known as