Biology experts can you check if my answer are right please?

Biotechnology cannot be used to:


a. Produce large quantities of particular human proteins


b. Produce effective and safe vaccines


c. Identify human fetuses with particular genetic diseases


d. Alter food plants to increase yield


e. Alter the intelligence levels of newborn infants





answer is E





DNA recombination does not occur between different species in nature by:


a. Bacterial transformation


b. Bacteria acquiring plasmids


c. Viruses transferring DNA between host organisms


d. Sexual reproduction in animals


e. None of the above is a correct choice





ANSWER IS E





Restriction enzymes:


a. Randomly sever DNA into small pieces


b. Defend bacteria against viral infections


c. Normally cut bacterial DNA as well as viral DNA


d. Will only cut DNA containing methyl groups


e. Will only work on viruses that attack bacteria





ANSWER IS A





Suppose ENZ-1 and ENZ-2 are two different restriction enzymes. If various pieces of DNA are cut with either of these enzymes, which of the following cut DNAs would join together most easily to form recombinant molecules?


a. Human DNA cut with ENZ-1 and gorilla DNA cut with ENZ-2


b. Human DNA cut with ENZ-1 and human DNA cut with ENZ-2


c. Human DNA cut with ENZ-2 and bacterial DNA cut with ENZ-2


d. Bacterial DNA cut with ENZ-1 and gorilla DNA cut with ENZ-2


e. All of the above choices





ANSWER IS B





Which of the following has not yet been done by using the technique of inserting human genes into bacteria?


a. Making growth hormone to help children grow normally


b. Making insulin to treat diabetics


c. Making blood clotting enzymes to treat hemophiliacs


d. Making cancer cell-killing hormones to treat those with malignancies


e. Making clot-dissolving enzymes to treat those with heart attacks


ANSWER IS E





Which of the following is not a goal of biotechnology?


a. To understand more about the process of inheritance and gene expression


b. To provide better understanding and treatment of various human diseases


c. To generate improved agricultural plants and domestic animals


d. To prevent the inheritance of human genes judged to be undesirable


e. All the above choices are valid goals of biotechnology





ANSWER IS D

Biology experts can you check if my answer are right please?
3. i don't think it's A because it's not random, mabye c? the rest i think your right but it's been a while since my genetics class.
Reply:Suppose ENZ-1 and ENZ-2 are two different restriction enzymes. If various pieces of DNA are cut with either of these enzymes, which of the following cut DNAs would join together most easily to form recombinant molecules?





I think the answer is C.


When two same enzymes cut different fragments they generate same ends since they are the same enzymes. So, when you cut with 2 different enzymes you will never have LIGATION. So, cutting bacterial DNA and HUman DNA with the same enzyme (1) will result in ligation. In fact, this is what we use in labs.
Reply:3 is wrong... answer is c.