Answer:
sugar-phosphate forms the structural framework of nucleic acids, including DNA and RNA
Explanation:
A sugar-phosphate backbone joins together nucleotides in a DNA sequence. The sugar-phosphate backbone forms the structural framework of nucleic acids, including DNA and RNA. This backbone is composed of alternating sugar and phosphate groups, and defines directionality of the molecule.
The answer is A. The sulfur-filled fluid that comes from the vents is lethal to some animals.
Deep-sea vents are hydrothermal vents at the bottom of the oceans. The mineral water that comes from them is rich in sulfide and methane and can be lethal to the most of animals. However, some bacteria are able to survive in such conditions thanks to the process of chemosynthesis. Chemosynthesis is a process in which some bacteria produce sugar, similarly to photosynthetic process. But, while in photosynthesis the energy of Sunlight is used to convert carbon dioxide and water into sugar and oxygen, in chemosynthesis, carbon dioxide, oxygen, and hydrogen sulfide are used to produce sugar, along to water and sulfur. This process is preferable when there is no light and the environment is rich in sulfide or methane, such in deep sea vents.
The correct answer is option D
The viruses lack the ability to reproduce without a host cell. This is the reason why the scientist declared that the viruses are considered as non living.
Viruses have genetic material in the form of DNA or RNA that is only used for replication in the host's body.
Viruses cannot survive without the host cell.
The basic unit for electric current is the ampere. Its official symbol is A, and in speech, it is frequently abbreviated as "amp". This is also defined as 1 coulomb (C) per second, where coulomb is a unit of charge. The ampere is one of the seven fundamental SI units and it is named after Andre-Marie Ampere.
Answer:
Membrane Transport by ion channels.
Explanation:
Stromal interaction molecules STIM1 and STIM2 are membrane proteins localized in the Endoplasmic Reticulum (ER). It has been shown that these proteins play important cellular functions. For example, STIM1 and STIM2 ion channels are involved in the activation of cell surface receptors, being it a specific signaling pathway associated with the store‐operated calcium entry. Calcium ions (Ca2+) in the cytoplasm are released from the ER by STIM1 and STIM2, and this protein activity is required for initiating different cellular processes including apoptosis, migration and cell proliferation.