A 29 year-old Caucasian male requests treatment for infertility. Routine patient reveals frequent colds and sinus infections; Examination of semen sample shows large numbers of non-motile spermatozoa. Chest X-rays reveal situs including right-sided location of the heart.
211. the most likely diagnosis is
(A) Down syndrome
(B) Cyptorchim
(C) Kartagener’s syndrome
(D) Bronchial pneumonia
(E) Klinefelter’s syndrome
A pregnant 39- years-old female has amniocentesis carried out because of concern about possible birth defect associated with pregnancy in older women. Strong reactivity with an antibody to glial fibrillary acidic protein (GFAP) is detected.
205. GFAP is
(A) found in neurons of the central nervous system
(B) a glycoprotein containing numerous sulfated side chains
(C) a constituent of […]
203. All of the following processes directly involve the binding/or hydrolysis of ATP EXCEPT
(A) assembly of actin monomers into microfilaments
(B) elongation of microtubules via addition of tubulin subunits
(C) movement of cilia
(D) transport of vesicles along axonal microtubules
(E) dissociation of myosin cross bridges from thin filaments in cardiac muscles
Match the appropriate lettered protein with the structure of function indicated by the numbered items that follow.
(A) Desmin
(B) Ankyrin
(C) Profilin
(D) Dynein
(E) Fragmin
(F) Actin
(G) ? –actinin
(H) Myosin
(I) Keratin
(J) Kinesin
(K) Integrin
(L) Tubulin
(M) Fibronectin
(N) Spectrin
Items 183-186
Examine the electron micrograph of a longitudinal section of skeletal muscle in Tissue-culture microscope 3.1 below and then match the lettered structure on the micrograph with the most appropriate description of this structure in the items below.
183. This structure contains an enzyme whose ability to release ADP and Pi is the rate limiting […]
Dissecting microscopes are perfect tools explorers used when they want to uncover natural wonders. These are designed to view specimens like insects, plants and minerals in a high-powered magnification. Top lighting is a feature most dissecting microscopes have that the other kinds of microscopes do not have. This gives them the edge when the discussion […]
Dissecting microscopes are constructed in such a way that these allow the magnification of three-dimensional objects. They can accommodate what compound microscopes can do with such ease.
Dissecting microscopes are often used in school laboratories because these contraptions help students in their biological studies. Here are some examples of activities that the students are engaged in, thanks to dissecting microscopes.
A dissecting microscope is a low magnifying microscope, which is typically used to observe and excise a given subject. Subjects may vary from a small plant to parts of animals. It can also cover the observation of electronic parts and complicated components of metals and rocks.
Are you looking for a new hobby which can provide you with tons of learning? Well certainly, a dissecting microscope can get you started. Almost everybody has experienced looking into microscopes and surprisingly people gasp for words to describe what they have just witnessed at that very moment. It can be very fascinating to see […]