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Which of the following statements about DNA is/are correct? 1) DNA is the hereditary material of all living organisms. 2) All segments of DNA code for the synthesis of proteins. 3) Nuclear DNA is double helical with two nucleotide chains that run anti-parallel. 4) DNA is also found in mitochondria. Select the correct answer using the code given below:

Which of the following statements about DNA is/are correct? 1) DNA is the hereditary material of all living organisms. 2) All segments of DNA code for the synthesis of proteins. 3) Nuclear DNA is double helical with two nucleotide chains that run anti-parallel. 4) DNA is also found in mitochondria. Select the correct answer using the code given below: Correct Answer 3 and 4 only

The correct answer is option 2, i.e 3 and 4 only.

The basic of DNA

  • Molecular genetics emerged from the realization that DNA and RNA both constitute the genetic material of all living organisms. Hence statement 1 is NOT correct.
  • DNA is called the blueprint of life because it contains the genetic code which are instructions needed for an organism to grow, develop, survive and reproduce.
  • DNA stores the genetic information of the cell in the sequence of its 4 bases that is adenine, thymine, guanine, and cytosine.
  • The information in a small segment of DNA i.e.a gene is sent by mRNA to the ribosome to synthesize a protein. Hence statement 2 is NOT correct.
  • Deoxyribonucleic acid is made up of a polymer chain comprised of smaller monomers called nucleotides.
  • Each nucleotide has three-part i.e. a sugar group, a phosphate group, and a nitrogen base.
  • There are four sorts of nitrogen bases i.e. adenine (A), thymine (T), guanine (G), and cytosine (C).
  • DNA has a double-helical structure with two nucleotide chains that run anti-parallel, the outer edges are formed by alternating deoxyribose sugar molecules and phosphate groups, which make up the sugar-phosphate backbone. Hence statement 3 is correct.
  • Mitochondrial DNA or mtDNA is that the small circular chromosome found inside mitochondria. Hence statement 4 is correct.

Related Questions

Which of the following statements about DNA is/are correct?
1. DNA is the hereditary material of all living organisms.
2. All segments of DNA code for synthesis of proteins.
3. Nuclear DNA is double helical with two nucleotide chains which run anti-parallel.
4. DNA is also found in mitochondria.
Select the correct answer:
Consider the following statements: 1. The chain reaction process is used in nuclear bombs to release a vast amount of energy, but in nuclear reactors, there is no chain reaction. 2. In a nuclear reactor, the reaction is controlled, while in nuclear bombs, the reaction is uncontrolled. 3. In a nuclear reactor, all operating reactors are ‘critical’, while there is no question of ‘criticality’ in case of a nuclear bomb. 4. Nuclear reactors do not use moderators, while nuclear bombs use them. Which of the above statements about operational principles of a nuclear reactor and a nuclear bomb is / are correct?
Consider the following statements.
1. The chain reaction process is used in nuclear bombs to release a vast amount of energy, but in nuclear reactors, there is no chain reaction.
2. In a nuclear reactor, the reaction is controlled, while in nuclear bombs, the reaction is uncontrolled.
3. In a nuclear reactor, all operating reactors are 'critical', while there is no question of 'critically' in case of a nuclear bomb.
4. Nuclear reactors do not use moderators, while nuclear bombs use them.
Which of the above statements about operational principles of a nuclear reactor and a nuclear bomb is/are correct?
Which of the following are the salient features of the Double-helix structure of DNA? 1. The two chains have antiparallel polarity. 2. The bases in two strands are paired through hydrogen bonds (H-bonds) forming base pairs (bp).  3. The two chains are coiled in a right-handed fashion. Select the correct answer using the code given below.
Four statements followed by three conclusions numbered I, Il and III. You have to assume the given statements to be true even if they seem to be deviate from commonly known facts. Read all the conclusions and then decide which of the given conclusions logically follows from the given statements, disregarding commonly known facts. Statements: Some plates are knives All knives are chains. Some chains are wheels. All wheels are poles. Conclusions: I. Some poles are chains. II. Some Wheels are knives III. Some chains are plates
Which of the following statements are correct? 1. The DNA Technology (Use and Application) Regulation Bill, 2019 provides for the regulation of use of DNA technology for establishing the identity of certain persons. 2. DNA is made up of 26 pairs of chromosomes and provides instructions for building an entire organism and proteins. 3. DNA is composed of two chains, which coil around each other to form a double helix carrying the genetic instructions used in the growth. 4. Under the Bill, DNA profiling is allowed only in respect of criminal matters. Select the correct answer using the code given below:
Which of the following statements about living and non-living being is/are correct? 1. While living being can demonstrate growth and repair, non-living being cannot. 2. While living being demonstrates metabolic processes, non-living being does not. Select the correct answer using the code given below.
In the following question below are given some statements followed by some conclusions. Taking the given statements to be true even if they seem to be at variance from commonly known facts, read all the conclusions and then decide which of the given conclusion logically follows the given statements. Statements: Some books are flowers. Some flowers are chains. Some chains are hammers. Conclusions: I. Some hammers are flowers. II. Some chains are books. III. Some hammers are books.
Which of the following statements are correct regarding the general difference between cell and nuclear membranes? 1. A cell membrane occurs in both Eukaryotes and Prokaryotes while a Nuclear membrane occurs only in Eukaryotes.  2. Both cell membrane and nuclear membrane persists throughout the lifetime of a cell. 3. The main feature of the nuclear membrane is the presence of two lipid bilayer structures while a cell membrane has single lipid bilayer structures. Select the correct answer using the code given below.
Correct answer for the given blank out of the four alternatives.
The main failings were of conception and a political willingness to settle _________ easy options. _______________ the expansive declarationsof the need "to maintain effective security of all nuclear materials, _______________ includes nuclear materials used in nuclear weapons”, thesummits narrowed their _______________ to civilian holdings __________________ non­nuclear weapon states.
_______________ includes nuclear materials used in nuclear weapons”