Question

100X The following structure are found in both rokaryotic and cukaryotic cells except (a) mitochondrion (c) cytosol (b) ribosome (d) plasma membrane What is the maximum total magnification of light microscopy? (a) 5X (c) 100X (b) 40X (d) 1000X 3. The microscopy that scans the specimen with a focused laser beam to obtain a series of two dimensional optical sections, which can be used to reconstruct an image of the specimen in three dimensions (a) SEM (c) TEM (b) Confocal (d) Fluorescence 4. The organelle found in all eukaryotic cells that confines the DNA and keeps them separated from the cytoplasm is. (a) lysosomes (c) nucleus (b) ribosomes (d) endosome 5. Which of the following organelles has both an Outer and an inner membre? (a) rough ER (c) mitochondrion (b) lysosome (d) Golgi apparatus 6. The scientific name of a worm, which is an excellent experimental organism used to study developmental biology, is (a) Ecol (c) Screw (b) D. melanogaster (d) C elegans 7. Which subatomic particles contribute to the positive charge for any given clement? (a) protons (c) electrons (b) neutrons (d) protons and neurons 8. The isotopes of an element is due to the different number of (a) electrons (c) protons (b) neutrons (d) ions 9. An ionic bond between two atoms is formed as a result of the (a) sharing of electrons. (c) sharing of protons (b) transfer of electrons (d) transfer of protons 10. What is the valence of carbon (a) (b) (c)2 ( 11. DNAs are polymers of molecules (a) nucleosides (c) nucleotides (b) monosaccharides (d) amino acids 12. The degradation of macromolecules starch can be best described as (a) anabolic (c) exergonic (b) metabolic (d) endergonic 13. Generally, the atom that is reduced will experience which of the following with respect to the electrons in its outer shell? (a) net gain (c) no change (b) met loss (d) an equal sharing 14. Enrymes speed up chemical reactions by lower the requirement of Calcolato (c) free energy equilibrium (d) activation energy 15. Based on the difference of free energy AG, which of the following reaction is considered as +73 kcal mole (c) 5.5 kcal/mole (1) -3.7 kcal mole (d) +686 kcal/mole 16. Cellular respiration can burning" chemicals originated from al fot (c) protein (d) all of the above 17. Which of the following molecule is used by human as a short term storage of energy? ca) cholesterol (c) starch th glycogen (d) fat 18. Which of the following event takes place during lycosis? Caloridation only (c) exeryonic only (b) reduction only (d) endergonie only (c) all of the above 19. The molecule originated from glycolysis that antis Krebs cycle directly is (a) lacose (e) pyruvate (b) oxaloacetate (d) acetyl COA 20. Which of the following is used preferentially as energy source by your brain? (a) glucose (c) fatty acids (b) protein (d) glycerol 21. Which of the following processes require (a) protein synthesis (c) muscle contraction (b) glycogen synthesis (d) all of the above

Answer 1

1 to 4 has already been answered.

5. C

Mitochondria is a double membrane bound organelles present exclusively in eukaryotes. The inner membrane is highly folded and is called as cristae.

Rough endoplasmic reticulum and lysosomes and Golgi apparatus are all unit membrane bound organelles exclusive to eukaryotes.

6. D

Fact to remember

7. A

Protons impart positive charge Where are electrons impart negative charge to any species. Neutrons do not have any charge.

8. B

Isotopes are molecules which have same atomic number but different mass number. It is caused due to difference in the number of neutrons.

Isobars are molecules which have same mass number but different atomic number. It is caused to the differences in the number of electrons.

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