Question
Why did Hershey and Chase work with bacteriophages in their experiments to prove that DNA is the genetic material? Explain.
✓
Answer
Hershey and Chase selected bacteriophage for their work because of the following reasons:
- A bacteriophage has only two components-protein and DNA.
- They worked to find whether it was protein or DNA from the virus that entered the bacteria.
- The bacteriophage attaches to the bacteria.
- Its genetic material enters the bacterial cell.
- The bacterial cell treats the viral genetic material as if it was its own and subsequently manufactures more virus particles. vi. Proving DNA to be the genetic material/by tracing the radioactivity on DNA.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Alien species are highly invasive and are a threat to indigenous species. Substantiate this statement with any three examples.
A teacher wants his/her students to find the genotype of pea plants bearing purple coloured flowers in their school garden. Name and explain the cross that will make it possible.
- Give the scientific name of the soil bacterium which produces crystal (Cry) proteins.
- How are these proteins useful in agriculture?
- What do the differently written terms ‘Cry’ and ‘cry’ represent respectively?
When someone buys packets of cigarettes, cannot miss the statutory warning that is present on the packing which warns against smoking and says how it is injurious to health. Yet, smoking is very prevalent in our society, both among young and old. Advise the adolescents about the importance of avoiding smoking. (Mention any six points.)
Bio-diversification of life started to occur almost 3 billion years ago. Since then new species have been evolving and then disappearing en masse from earth.
a. How many episodes of mass extinctions of species have already taken place and which one is in progress in the current era?
b. How is current episode in progress different from the previous episodes and why? Explain.
a. How many episodes of mass extinctions of species have already taken place and which one is in progress in the current era?
b. How is current episode in progress different from the previous episodes and why? Explain.
Draw a Punnett square diagram showing the incomplete dominance.
Besides better aeration and mixing properties, what other advantages do stirred tank bioreactors have over shake flasks.
The image below describes the process of Gene Therapy.
i. What is gene therapy?
ii. Name the first clinical case in which it was used.
i. What is gene therapy?
ii. Name the first clinical case in which it was used.
What is the study of fossils called? Mention any three points how the fossils throw light on the past.
Enumerate three most characteristic criteria for designating a Mendelian population.