What is the mass of an atom that has 4 protons, 5 neutrons and 4 electrons? 5 8 9 13

Recombinant DNA technology is possible because all organisms O A. rely on ribosomes to assemble proteins B. have some of the same genes C. use the same codes for amino acids D. replicate DNA before cell division

Which of the following cells engulf antigens by phagocytosis and present fragments of them on their own surfaces for recognition? a. plasma cells b. T lymphocytes c. dendritic cells d. NK cells

The apex is located at the A. cementoenamel junction. B. cervical neck. C. tip of the root. D. apical foramen.

Why does the code in dna need to be converted again into RNA before proteins can be made

In mitochondria, the rate of electron transfer is tightly coupled to the demand for ATP. When the rate of use of ATP is relatively low, the rate of electron transfer is low; when demand for ATP increases, electron‑transfer rate increases.

Which moon phases are direct opposites of each other in both appearance and position?

During Mendel's first set of experiments, he allowed true-breeding tall plants to cross with true-breeding short plants. What happened when he allowed the F, offspring from this first set of experiments to self-pollinate?

What process produced the sperm in the male flies and egg in the female flies

Explain why we would expect to find glucose in the urine of a diabetic person

What affect does extreme temperature and extreme pH have on enzyme activity?