Definitely, YES. It is important for all scientists to be open about ethical and moral aspects of their research projects from the first step to the conclusions or findings. Many universities and research centers have established Ethics Committees whose task is to approve or disapprove research projects even before being conducted.

It is not, nor should it ever be, that a concern for ethics should be suspected of holding back research. On the contrary, ethical concerns advance the aims of research, which have to do with knowledge, truth, and the reduction of error; they foster values that drive collaborative work, such as fairness, mutual respect, and trust; they give the assurance that researchers can be held accountable; they help build public support; and they promote associated moral and social values, such as compliance with the law, human rights, social responsibility, etc. And so, yes: scientists should make explicit the dilemmas they face.

Definitely, YES. It is important for all scientists to be open about ethical and moral aspects of their research projects from the first step to the conclusions or findings. Many universities and research centers have established Ethics Committees whose task is to approve or disapprove research projects even before being conducted.

There are many unclear concepts in the question with out which you can not prepare a good answer: What do you mean by"practicing science", or who do you call"scientists" and of course what you mean by" ethical and moral dilemmas"? with out knowing uncocealing these concepts there can be no answer for the question. however, if by science you mean: an theoretical intervention to a live being,human or animal,-as what might happen in some experimental psychologies, or other experimental practices, like what white scientists did to minorities or women of not developed countries to invent Combined oral contraceptive pills, the answer is Yes;

Yes. Reasons: 1) discussions inform people about moral issues; people do not have innate knowledge and understanding of ethical and moral problems; and it's important to keep both scientists and the public; 2) it is impossible to self reflect, especially on a collective level, and device better practices for the future without discussion.