MRNA, is used to transcript DNA codes from DNA molecules and then later exits the nucleus via nuclear pore, then moves to the ribosome. Then, tRNA is activated to bring specific amino acid to the ribosome for translation. Ribosome, which is the site of synthesis of proteins, is composed of rRNA and ribosomal proteins.
A codon is a three-base sequence (three nitrogen bases in a row) on mRNA. An anticodon is a three-base sequence on tRNA. It matches the codon.
Answer: alpha
Explanation: Alpha particles are fast moving streams of positively charged particles that are shown to be Helium nuclei. They have a mass
number of 4 and an atomic number of 2 and a charge of +2. Alpha particles are represented as 4He2. When 238U92 becomes 234Th90, it emitted a helium nucleus 4He2. The equation for the decay is 238U92 ---> 234Th90 + 4He2.
C. Digestion of food
The answer is C because the rest of the answer choices are all physical reactions. In your stomach, food is chemically broken down by different substances.
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➳ CloutAnswers
Nucleus - regulates all cell activity, and also holds the DNA
Smooth endoplasmic reticulum - lipid and carbohydrate synthesis.
Rough er - produces and modifies proteins
Located next to the nucleus
Golgi apparatus - <span>modify, sort, and package macromolecules for cell secretion </span>
Ribosome - <span> assembles the twenty specific amino acid molecules to form the particular protein molecule</span>
Mitochondria - converts energy into compounds that are easier for the cell to use
Chloroplast -<span> captures the energy from sunlight and converts it into food that contains chemical energy in a process called photosynthesis</span>
Lysosomes - breaks down, recycles macromolecules (lipids, carbohydrates, and proteins)
Perioxisome - where hydrogen peroxide and other harmful molecules are broken down by enzymes
Plasma membrane - controls the kinds and amounts of substances moving into and out of the cell; helps maintain cytoplasmic volume and composition
Cytoskeleton - structurally supports, impacts shape and moves cell and its componants
Centrioles - two perpendicular cylinders that form mitotic spindle fibers and microtubules for cilia and flagella, helps organize cell division
Cytoplasm - holds all organelles in place
Vacuole - stores water, salts, protein, and carbohydrates
Vesicles - <span>contains substances that recently entered the cell. Stores and transports newly synthesized molecules.</span>
Cell wall - supports and protects the cell, rigid barrier
Osmosis refers to the transfer of water across a membrane and pressure of water inside plant cells is called turgor pressure. Osmosis causes cells to lose or gain water, which means it can increase or decrease the turgor pressure inside the cells. When the concentration of water available outside the cell is higher than inside, plant cell will gain water. When it's the other way around, the plant cells lose water.
