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TLS Online TPP Program

#Question id: 779

Which is TRUE of the following statements?

#Unit 1. Molecules and their Interaction Relevant to Biology

  1. A microRNA normally works by binding to perfectly complementary sequences within an RNA transcript, usually a mRNA.

  2. A single type of mRNA can be regulated by multiple different miRNAs.

  3. A single miRNA normally binds to transcripts from just one target gene.

  4. MicroRNAs normally regulate the expression of just a single gene.

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TLS Online TPP Program

#Question id: 15192

#Unit 8. Inheritance Biology

Genes that control coat color in mammals represent some of the best early examples of genes with multiple alleles exhibiting different phenotypes. A classic example is the C gene in hamsters. Three of the known alleles of this gene are C, ca and ck. Each supplies a different amount of black pigment to the coat hair. The phenotypes of three different homozygous strains are as follows.
Based on the concepts of recessivity, determine whether ck and ca were dominant or recessive alleles by crossing the true-breeding albino hamsters  with the true-breeding sepia hamsters. From the resulting F1 progeny phenotype, what would be the ratio of F2 phenotype
TLS Online TPP Program

#Question id: 2994

#Unit 2. Cellular Organization

If a cell has completed meiosis I and the first cytokinesis, and is just beginning meiosis II, which of the following is an appropriate description of its genetic contents?
TLS Online TPP Program

#Question id: 12571

#Unit 10. Ecological Principles

Although extinction is a natural process, current extinctions are of concern to environmentalists because
TLS Online TPP Program

#Question id: 2620

#Unit 2. Cellular Organization

Which option is correct about catabolite activator protein binds as
TLS Online TPP Program

#Question id: 15779

#Unit 5. Developmental Biology

During stem cell regulation extracellular mechanisms leading to intracellular changes that regulate stem cell behaviour. Which of the following is not consider as extracellular mechanisms for stem cell regulation?