Lesson No. 6,7
Time :- 1 Hrs
Sub:- SchTI
Q.1 A) Fill in the blanks
1.
is an important component of protein and nucleic acid.
2. The pattern of energy exchange in an ecosystem is called as
the flowers are tetramerous or pentamerous,
. In pleridophytes, asexual reproduction occurs by
formation and sexual reproduction
occurs by
formula
B) Answer the following.
(1. Write the balanced chemical equation for photosynthesis and resperation.
2. Clve reason: Flow of nutrition to an ecosystem is cyclick.
3. Distinguish between:
1) Flow of matter and Flow of energy
LI) Gaseous cycle and sedimentary cycle.
Q.2 Answer the following questions brielly (Any 2)
1. Write the characteristics of division bryophyte
2. Write a paragraph in your own words about the omamental plants called Ferns.
3. Explain In detalls the interrelationship in between the food chain and food web.
4. What types of changes occur in the amount of energy during its transfer from plants to apex consum
Q.3 Answer the following.
1. Explain nitrogen cycle in own words with suitable diagram.
Answers
Answer:
Explanation:
Nucleic acids are the biopolymers, or large biomolecules, essential to all known forms of life. The term nucleic acid is the overall name for DNA and RNA. They are composed of nucleotides, which are the monomers made of three components: a 5-carbon sugar, a phosphate group and a nitrogenous base. If the sugar is a compound ribose, the polymer is RNA (ribonucleic acid); if the sugar is derived from ribose as deoxyribose, the polymer is DNA (deoxyribonucleic acid).
Nucleic acids are the most important of all biomolecules. These are found in abundance in all living things, where they function to create and encode and then store information of every living cell of every life-form organism on Earth. In turn, they function to transmit and express that information inside and outside the cell nucleus—to the interior operations of the cell and ultimately to the next generation of each living organism. The encoded information is contained and conveyed via the nucleic acid sequence, which provides the 'ladder-step' ordering of nucleotides within the molecules of RNA and DNA.
Strings of nucleotides are bonded to form helical backbones—typically, one for RNA, two for DNA—and assembled into chains of base-pairs selected from the five primary, or canonical, nucleobases, which are: adenine, cytosine, guanine, thymine, and uracil. Thymine occurs only in DNA and uracil only in RNA. Using amino acids and the process known as protein synthesis,[1] the specific sequencing in DNA of these nucleobase-pairs enables storing and transmitting coded instructions as genes. In RNA, base-pair sequencing provides for manufacturing new proteins that determine the frames and parts and most chemical processes of all life forms.