A Culture of animal cells in which the cell cycles were asynchronous was incubated with 3H-Thymidine for 10 minutes.Autoradiography showed that 50% of the cells were labelled. If the cell cyle time (generation time) was 16 hrs, how long was the S period?

Read the given passage and answer the questions that follows: Rhodinus, a blood-sucking bug, shows five instars before it metamorphoses into an adult. It ahs a very long head with the brain located at tip and an organ called Corpora Cardiaca (C C) behind it. The hormone that ensures the continuum of the juvenile stages is called a juvenile hormone. Behind the head is a pro - thoracic gland, which gets triggered by the Pro - Thoracico - Tropic Hormone (PTTH) to release ecdysone required for molting into an adult. The following observations were made when the juveniles of this insect were subjected to various conditions : 1. Starved juveniles (any instar) when decapitated rarr remained juveniles and did not molt into adults. 2. Well-fed juveniles (any instar) when decapitated rarr molted into adults. 3. Starved juveniles (any instar) when partially decapitated to remove the brain cells rarr remained juveniles and did not molt into adults. 4. Well - fed juveniles (any instar) when partially deitated to remove the brain cells rarr did not molt into adults. If an unfed, completely decapitated, fth (final) instar juvenile is connected to a well-fed, decapitated fourth instar juvenile by a glass tube so that fluids can be exchanged, what whill be the expected result ?

A conductivity cell has been calibrated with a 0.01M, 1:1 electrolytic solution (specific conductance (kappa=1.25 times 10^(-3)" "S" "cm^(-1)) in the cell and the measured resistance was 800Omega at 25^(@)C . The cell constant is,

Given table gives an account of differences between PCR and gene cloning. Which of the following points shows the incorrect difference ? {:("Parameter",PCR,"Gene cloning"),(1."Efficient","More","Less"),(2."Apparatus Requirement",DNA,"Restriction enzyme, ligase, vector, bacterial cell"),(3."Manipulation","in vitro","in vitro and in vivo"),(4."Cost","More","Less"),(5."Automation","Yes",No),(6."Error probability","Less","More"),(7."Time for a typical experiment","2-4days",4hours),(8."Application","More","Less"):} a) 1 and 3 b) 4,5 and 6 c) 4 and 7 d) 4,7 and 8