Tissue-Culture-Microscope Resources

Tissue-Culture-Microscope

• Items 180-182
  (A) Monozygotic twins (B) Dizygotic Twins (C) Both (D) Neither 180. can be same sex or different sex 181. are invariably genetically and phenotypically identicalread more...
  
• Items 176-179
  The following set of items refers to the cytoplasmic localization of mRNA molecules. 176. Messenger RNA (mRNA) is LEAST likely to be found (A) in the nucleus (B) traversing a nuclear pore (C) associated with ribosomes of the rough endoplasmic reticulum (D) in the cytoplasm but devoid of any associated proteins (E) interacting with small ribosomal subunits and initiation factors 177. Theread more...
  
• Items 172-175
  This set of items refers to the synthesis and processing of RNA. For each numbered item choose the ONE lettered answers that is most appropriate. 172. Select the cellular region most likely to be the site of synthesis of messenger RNA (mRNA). (A) nuclear envelope (B) nucleolus (C) euchromatin (D)read more...
  
• Items 167-171
  Examine the electron micrograph of a freeze-fracture-etch specimen in Figuer 2.3 below and then choose the best response to the items below. 167. The structures at the arrows are (A) nuclear pore complexes (B) coated pits (C) gap junctions (D) ribosomes on endoplasmic reticulum (E) electron transport particles 168. These structures have which important function in the cell? read more...
  
• Items 159-166
  Match the nuclear protein in the list below with the most appropriate description of its functions in the items below. Answers may be used once, more than once, or not at all. (A) Histone H2A (B) Histone H1 (C) Cyclin (D) p 34 kinase (E) Nucleoplasmin (F) Lamin (G) Lamin kinase (H) Lamin phosphatase read more...
  
• Items 154-158
  Examine the transmission electron micrograph in Tissue-culture microscope 2.2 below and then choose the best response to the items below. 154. The structure at the opointer is a (A) nucleosome (B) kinetochore (C) nucleolus (D) nuclear envelope (E) heterochromatin mass 155. The chief function of this structure is read more...
  
• Items 149-153
  A twelve year-old female of Mediterranean background presents with severe anemia, weight loss and general fatigue. There is also a strong family history of severe anemia. Laboratory analysis shows a severe depletion of the ?-globin component of hemoglobin. 149. The most likely diagnosis for this child is (A) sickle cell anemia (B) pernicious anemia (C) Vitamin B12 deficiency T (D) read more...
  
• Items 145-148
  ( A ) Introns ( B ) Exons ( C ) Both ( D ) Neither 145. Contain nucleotide sequences read by RNA polymerase II. 146. Contain dispensable nucleotide sequences that are not spliced into mRNA. 147. Contain nucleotide sequences that are removed from the transcript before it is converted into mRNA. 148. Contain nucleotide sequences that are sometimes alternatively spliced into read more...
  
• Items 137-144
  Molecularly cloned DNA sequences are rapidly becoming an important tool in medicine. They can be used in the production of clinically important proteins, as diagnostic tools or in the application of gene therapy of inherited genetic defects. The following list of items refer to some key aspect of molecular cloning technology. Match the appropriate terms read more...
  
• ITEMS 133-136
  Polymerase chain reaction (PCR) technology has revolutionized DNA – based diagnostic procedures, this technique was developed in the mid – 1080’s and exploits certain basic features of the DNA replication process. 133. The polymerase chain reaction (PCR) requires all of the following EXCEPT: (A) highly purified and cloned DNA (B) a thermal cycling device (C) a supply of deoxyribonucleotide read more...
  
• ITEMS 131-132
  DNA – based diagnosis and treatment of inherited diseases is rapidly becoming an invaluable tool in the practice of medicine. The following set of items concern recent advances in molecular biology for the diagnosis and treatment of inherited disease. 131. All the following statements concerning ? – thalassemia are correct EXCEPT: (A) There are more than 50 read more...
  
• ITEMS 128-130
  128. Restriction endonuclease digestion of DNA can used in all of the following medical situation EXCEPT: (A) diagnosis of sickle cell anemia (B) diagnosis of ? – thalassemia (C) diagnosis of cystic fibrosis (D) diagnosis of pregnancy (E) establishment of paternity 129. Restriction fragment length polymorphisms (RFLP) are medically useful in a growing number of arenas. Which statement BEST characterizes these read more...
  
• ITEM 123-127
  For each numbered items of and event during meiosis, choose the lettered phase that is the most appropriate match for the time during which the event is most likely to occur. A) Prophase I (B) Metaphase I (C) Anaphase I (D) Telophase I (E) Cytokinesis after Meiosis I (F) Prophase II (G) Metaphase II (H) Anaphase II (I) Telophase II (J) Cytokinesis after Meiosis II (K) read more...
  
• Items 116-122
  The following set of items pertains to the cell cycle. Match the portion of the cell cycle in the answer with the most appropriate description of this portion of the cell cycle in the items. (A) G0 (B) G1 (C) G2 (D) S (E) M 116. Many differentiated cells are permanently arrested in this phase of the cell cycle. read more...
  
• Items 110-115
  The following set of items pertains to the structure and function of the mitotic spindle. For each numbered statement of function, choose the lettered structure that most closely corresponds. (A) Polar microtubules (B) Kinetechore microtubules (C) Astral microtubules (D) Centriole (E) Centrosome (F) Centromere (G) Kinetochore (H) Microfilaments (I) Kinesin 110. These tubulin-rich structures extend form from the centrosomes to the chromosomes.read more...
  
• Items 106-109
  106. Which portion of the cell cycle was this cell in when this karyotype was made? (A) G (B) S? (C) M (D) I (E) G1 read more...
  
• ITEMS 101-105
  For each numbered items of an event that occurs during mitosis, choose the lettered stage of mitosis that most closely corresponds. (A) Prophase (B) Metaphase (C) Anaphase (D) Telophase (E) None of the aboveread more...
  
• Items 98-100
  98. Which enzyme is inhibited by this drug? ( A ) DNA polymerase ( B ) thymidine kinase ( C ) reverse transcriptase ( D ) thymidylate synthetase ( E ) HGPRT 99. Which compound would accumulate in 5-FU treated patients? read more...
• CHAPTER II - NUCLEUS, CELL CYCLE,MITOSIS AND MEIOSIS
  Items 94-97 94. In a typical eukaryotic cell the nucleus ( A ) has a diameter of between 50 and 520 ?m ( B ) is tightly connected to the plasma membrane by bunds of microtubules ( C ) contains chromatin, which is a complex of acidic proteins and glycolipids ( D ) is surrounded by a double membrane, the read more...
  
• Bacteria Culture Propagation
  Bacteria are single-celled microorganisms and can be found anywhere in the planet. Although they are often seen in a negative light, bacteria also plays a positive role as it help in recycling nutrients and discovering cures for various diseases. A tissue culture microscope is used for studying bacteria. Not all species of bacteria, however, can read more...
  
• Growth Medium
  A tissue culture microscope is used for observing cells and tissues in a controlled environment, more often than not a sterilized container wherein all the requisites for growing can be found. Tissue culture microscopes are often inverted in design, meaning that a user will have to look up rather than down to see the magnified read more...
  
• Plant Tissue Culture Growth: Propagation, Uses and Advantages
  Plant tissue culture growth has been in use for many decades to improve plant variety and quality. Many of the world’s most successful attempts at plant breeding and propagation came as a result of plant tissue culture efforts both by professional agriculturists and hobby horticulturists. Aside from providing better looking and interesting varieties of plants, read more...
  
• Safety Considerations for Growing Tissue Culture
  Tissue culture or micropropagation is one of the most important and useful processes used to increase plant variety and improve both plant and animal species. No longer is growing and nurturing a specified variety or characteristic of a particular plant a problem, primarily because tissue culture helps produce more plants without the need of relyingread more...
  
• Important Steps in Tissue Culture Preparation
  The success in developing and growing plant and animal tissue cultures is dependent on the preparation and skill of the individual who will be performing the steps. Tissue culture is a very sensitive process, efficient and useful only when performed under controlled conditions. There are certain steps involved in tissue culture preparation and read more...