The main idea is that Xenopus ova can transcribe and translate injected foreign DNA, turning it into RNA and then protein. The oocyte’s transcriptional and translational machinery is highly active, so if the foreign DNA includes a promoter that the oocyte’s RNA polymerase II recognizes, it will be transcribed into mRNA and then translated into a detectable protein. That’s why expressing the foreign DNA is the expected outcome. So, the best answer is “Express,” because the goal is to see the exogenous gene produce RNA and protein inside the egg. While DNA can occasionally be degraded or the DNA might bind to cellular components without producing protein, the scenario described focuses on the ability of the oocyte to express the introduced genetic material.

Inbred strains are created by long-term brother-sister matings to produce nearly identical genetics across individuals, giving researchers a uniform background to study. BALB/c is a classic example of an inbred strain, maintained for many generations to maintain genetic and phenotypic consistency that’s valuable for immunology and cancer research. The other strains listed are outbred stocks, kept to preserve genetic diversity and heterogeneity, which makes them less uniform for controlled experiments. That combination of consistent genetics and well-documented traits makes BALB/c the best choice.

Steam under pressure makes autoclaving effective by driving the temperature up to about 121°C (250°F). At this temperature, proteins in microorganisms denature and most spores are killed when the exposure is long enough. The commonly cited standard cycle uses 121°C at about 15 psi for 15 minutes, which reliably sterilizes typical wrapped instruments and loads while keeping the process efficient. The other options either don’t reach a sufficient temperature or time to guarantee sterility, or impose a higher temperature for longer than the standard routine, which isn’t the typical cycle referenced for general autoclave sterilization.

The mission defines why the organization exists today—the purpose, scope, and how it serves stakeholders. The vision translates that purpose into a future state the organization aims to achieve, showing what success looks like down the road to fulfill the mission. Because the future direction must align with and support the organization’s purpose, the mission helps create the vision. In practice, you start with the mission to anchor your long-term aspirations, then craft a vision that shows how fulfilling that mission will unfold over time. That grounding explains why the correct choice emphasizes that the mission helps shape the vision.