Short Answer Set 1: SA 1. Ion channels are typically gated. Define ‘gating’ in this context and identify the three different stimuli that function to gate ion channels. SA 2. There are many regulatory steps involved in converting the information stored in genomic DNA to an active protein. Identify one post-transcriptional and one post-translational regulatory mechanism present in eukaryotic cells. SA 3. Identify the three transport mechanisms used for the intracellular trafficking of proteins that contain a sorting signal. Provide an example of an organelle that acquires its protein through each of these mechanisms. SA 4. A ribosome is described as having an A-, a P-, and an E-site. Identify the specific tRNA that occupies each of these sites during translation. SA 5. Identify two roles for SNARE proteins in vesicular trafficking. SA 6. Identify the direction of potassium ion movement by the potassium leak channels.  Is this an active or a passive process? What is the driving force for this movement? In which membrane is this channel found?

Questions 76 to 91 relate to material covered in BIO8053 (Comprehensive Study of Animals)

An analysis of variance yielded the following results.  Using the information provided, provide values for the rest of the table (a-d). (0.3pts each)   Given the F-ratio, do you think that you would reject the null hypothesis? (0.3pts)

Which of the following class or phylum is NOT correctly matched with a structure it possesses?

a. Identify an example member of the Chondrichthyes and Osteichythes. b. Compare and contrast Chondrichthyes and Osteichthyes. focusing on the: Skeleton Skin Respiratory system

Select from the options to correctly complete the following statement: Cardiac is considered ___________ muscle with the signal (for contraction) originating at the ___________, while skeletal muscle is considered __________ muscle.

The rhesus blood group gene (rhesus positive = R; rhesus negative = r) and a gene that causes a form of anemia called elliptocytosis (E = anemia; e = no anemia) show linkage. In 50 families, one parent is Rh negative with no anemia (r___e r___e) and the other parent is Rh positive with anemia (R___e r___E). Of 50 offspring: 22 are R___e r___e      22 are r­___E r­­­­___e        3 are R___E  r___e     3 are r___e r___e. Based off these 50 families. How many map units apart are the genes?

Questions 47 to 56 relate to material covered in BIO8023 (Modern Microbiology)

Spider goats, who have a gene to produce spider silk instead of milk, are an example of:

Question 2 This is an experimental study.