Class 12 Biology - Chapter Biotechnology Principles and Process NCERT Solutions | Discuss with your teacher and find out h
Discuss with your teacher and find out how to distinguish between
(a) Plasmid DNA and chromosomal DNA
(b) RNA and DNA
(c) Exonuclease and Endonuclease
(a) Plasmid DNA and chromosomal DNA
|
Plasmid DNA |
Chromosomal DNA |
|
Plasmid DNA is an extra-chromosomal DNA molecule in bacteria that is capable of replicating, independent of chromosomal DNA. |
Chromosomal DNA is the entire DNA of an organism present inside chromosomes. |
(b) RNA and DNA
|
RNA |
DNA |
|
|
1. |
RNA is a single stranded molecule. |
DNA is a double stranded molecule. |
|
2. |
It contains ribose sugar. |
It contains deoxyribose sugar. |
|
3. |
The pyrimidines in RNA are adenine and uracil. |
The pyrimidines in DNA are adenine and thymine. |
|
4 |
RNA cannot replicate itself. |
DNA molecules have the ability to replicate. |
|
5 |
It is a component of the ribosomes. |
It is a component of the chromosomes. |
(c) Exonuclease and Endonuclease
|
Exonuclease |
Endonuclease |
|
|
|
It is a type of restriction enzyme that removes the nucleotide from 5’ or 3’ ends of the DNA molecule. |
It is a type of restriction enzyme that makes a cut within the DNA at a specific site to generate sticky ends. |
More Questions From Class 12 Biology - Chapter Biotechnology Principles and Process
- Q:- Can you list 10 recombinant proteins which are used in medical practice? Find out where they are used as therapeutics (use the internet).
- Q:- What would be the molar concentration of human DNA in a human cell? Consult your teacher.
- Q:- Do eukaryotic cells have restriction endonucleases? Justify your answer.
- Q:- Describe briefly the followings:
(a) Origin of replication
(b) Bioreactors
(c) Downstream processing - Q:- Besides better aeration and mixing properties, what other advantages do stirred tank bioreactors have over shake flasks?
- Q:- Can you think and answer how a reporter enzyme can be used to monitor transformation of host cells by foreign DNA in addition to a selectable marker?
- Q:- Explain briefly
(a) PCR
(b) Restriction enzymes and DNA
(c) Chitinase - Q:- From what you have learnt, can you tell whether enzymes are bigger or DNA is bigger in molecular size? How did you know?
- Q:- Collect 5 examples of palindromic DNA sequences by consulting your teacher. Better try to create a palindromic sequence by following base-pair rules.
- Q:- Make a chart (with diagrammatic representation) showing a restriction enzyme, the substrate DNA on which it acts, the site at which it cuts DNA and the product it produces.
Popular Questions of Class 12 Biology
- Q:- Why is reproduction essential for organisms? Answer
- Q:- Name the parts of an angiosperm flower in which development of male and female gametophyte take place.
- Q:-
Fill in the blanks:
(a) Humans reproduce __________. (asexually/sexually)
(b) Humans are__________. (oviparous/viviparous/ovoviviparous)
(c) Fertilization is __________ in humans. (external/internal)
(d) Male and female gametes are __________. (diploid/haploid)
(e) Zygote is __________. (diploid/haploid)
(f) The process of release of the ovum from a mature follicle is called__________.
(g) Ovulation is induced by a hormone called the __________.
(h) The fusion of male and female gametes is called _____________.
(i) Fertilisation takes place in _____________.
(j) Zygote divides to form _____________which is implanted in uterus.
(k) The structure which provides vascular connection between fetus and uterus is called ____________. - Q:- What do you think is the significance of reproductive health in a society?
- Q:- Mention the advantages of selecting pea plant for experiment by Mendel.
- Q:- Group the following as nitrogenous bases and nucleosides:
Adenine, Cytidine, Thymine, Guanosine, Uracil and Cytosine. - Q:- Explain antibiotic resistance observed in bacteria in light of Darwinian selection theory.
- Q:- What are the various public health measures, which you would suggest as safeguard against infectious diseases?
- Q:- Explain in brief the role of animal husbandry in human welfare.
- Q:- Bacteria cannot be seen with the naked eyes, but these can be seen with the help of a microscope. If you have to carry a sample from your home to your biology laboratory to demonstrate the presence of microbes under a microscope, which sample would you carry and why?
Recently Viewed Questions of Class 12 Biology
- Q:- Give an account of energy flow in an ecosystem.
- Q:- When a cross in made between tall plants with yellow seeds (Ttyy) and tall plant with green seed (Ttyy), what proportions of phenotype in the offspring could be expected to be (a) Tall and green. (b) Dwarf and green.
- Q:- If the sequence of one strand of DNA is written as follows:
5-ATGCATGCATGCATGCATGCATGCATGC-3
Write down the sequence of complementary strand in 5→3 direction - Q:- Why is the offspring formed by asexual reproduction referred to as clone?
- Q:- How did Hershey and Chase differentiate between DNA and protein in their experiment while proving that DNA is the genetic material?
- Q:- Which is a better mode of reproduction sexual or asexual? Why?
- Q:- What is vegetative propagation? Give two suitable examples.
- Q:- Examine a few flowers of any cucurbit plant and try to identify the staminate and pistillate flowers. Do you know any other plant that bears unisexual flowers?
- Q:- Why are offspring of oviparous animals at a greater risk as compared to offspring of viviparous animals?
- Q:- What is a bisexual flower? Collect five bisexual flowers from your neighborhood and with the help of your teacher find out their common and scientific names.
- All Chapters Of Class 12 Biology
- All Subjects Of Class 12