Answer:
True
Explanation:
A DNA molecule is composed of the nitrogenous bases stacked inside the two backbones made up of the phosphate and sugar molecules. The nitrogenous bases form the nucleotide which when read in the triplets called codons code for specific amino acid and then form proteins.
If we say that we have to protect the DNA than it means that we have to conserve the DNA molecule. Conserving the DNA molecule means that the sequence of nucleotide which codes for specific proteins must be conserved as it is the protein molecule that is essential for survival.
Thus, true is correct.
Answer: No, The digestive enzyme pepsin is an example of the class of enzymes known as aspartyl proteases. Proteases are enzymes that hydrolyze peptide bonds. Aspartyl proteases use two aspartate groups in the active site to cleave the bond.
Explanation:
Answer:
Dehydration
Explanation:
What causes bacteria to die in an extremely salty environment is dehydration due to the loss of osmotic balance in their cells.
Water molecules would normally move from the region of high water potential or low solute concentration to the region of low water potential or high solute concentration through a biologically permeable membrane.
<em>An extremely salty environment would be hypertonic to the cells of bacteria and the cell walls of bacteria act as biologically permeable membranes. Hence, the bacteria cells lose water due to the osmotic movement of water from their cells to the surrounding salty environment. </em>
The correct answer is option C, that is, both the organisms generate haploid spores and exhibit diploid and haploid stages.
The sporophyte (of the haploid stage) in pteridophytes produce spores. The diploid stage in pteridophytes may take place when two of the spores combines and give rise to a prothallus, that is, the diploid stage of the pteridophytes.
In fungi, the production of spores takes place by sporangiophores (haploid stage). At a certain stage, two horizontal hyphae among the two species of fungi, may amalgamate at the tips and produce a zygote (diploid) via plasmogamy and karyogamy.
