Answer:
False
Explanation:
Prokaryotic cells lack a membrane enclosed nucleus and organelles.
C) is definitely the bacterium!
A) look like a paramecium with it's flagela and vacuole
B) is a plant cell with chloroplasts
D) could be an animal cell, plant, or fungal since it has a nucleus
**remember: bacteria lack ALL membrane bound organelles: nucleus, mitochondria, chloroplasts, E.R.!!
Answer:
Explanation:
In the structure of Nucleic acids the nucleobases (nucleotide and bases) are arranged is a specific form.This form of arrangement is called Base stacking.It simply refers to the bond formed between the adjacent bases.
These nitrogenous bases of (A,T,C.G) pairing in DNA are in planes in geometry.The bases planes stack with one another.This form of arrangement give rooms for more Van der Waals interactions in the plane of the bases.Although the Van der Waals are weak interactions,the bond ensure that these bases are braided or twisted together to give maximum energy,to maintain stability of the bases,and therefore of DNA structure
Therefore in water and other aqueous solution the stability of structure of DNA is enhanced by the base stacking,(coiling or twisting)with maximum van der waals interaction among the bases, than the hydrogen bonds formed between bases.Generally there are more stacking among G-C,than A-T,thus the former pairing contribute more the structural stability than the latter (A-T)
The larynx is mostly made of cartilage, 3 paired (arytenoid, corniculate, cuneiform) and 3 unpaired (epiglottic, thyroid, and cricoid). The larynx is attached to the hyoid bone in humans and positioned lower in the throat. This decreases the nasality of the sound and increases the tonality as well as the resonance of the sound produced by the larynx which is required for effective communication.
