ng structure are found in both and eukaryotic cells except mitochondrion (c) cyt
ID: 280004 • Letter: N
Question
ng structure are found in both and eukaryotic cells except mitochondrion (c) cytosol (b) ribosome (d) plasma membrane 2. What is the maximum total magnification of light y? (a) 5X (b) 40X (c) 100x 1000X 3. The microscopy that scans the specimen with a tocused laser beam to obtain a series of two- ional optical sections, which can be used to reconstruct an image of the specimen in three dimensions OSEM (b) Confocal (c) TEM (d) Fluorescence 4. The organelle found in all eukaryotic cells that confines the DNA and keeps them separated from the cytoplasm is. (a) lysosomes (b) ribosomes nucleus (d) endosome 5. Which of the following organelles has both an outer and an inner membrane? rough ER (c) nuclear envelope (d) Golgi apparatus (b) lysosome 6. The scientific name of flat worm, which is an excellent experimental organism used to study developmental biology, is (a) E coli (c) S cerevisiae (b) D. melanogasterC elegans 7. Which subatomic particles contribute to the positive charge for any given element? (c) electrons protons and neutrons 8. The isotopes of an element is due to the different (a) protons (b) neutrons number of (c) protons (d) ions (a) electrons neutrons 9. An ionic bond between two atoms is formed as a result of the (a) sharing ofelectrons. (c) sharing ofprotons transfer of electrons (d) transfer of protons (a)1 (b)3 (e)2 4 (a) nucleosides (c) nucleotides 10. What is the valence of carbon molecules 11. DNAs are polymers ofExplanation / Answer
Hi Answer:
1. Prokaryotic and eukaryotic cell except for mitochondria. [Prokaryotic cells do not contain any membrane-bound structure called organelles. As mitochondria is an organelle so the prokaryotic cells lack this organelle. Whereas they have Cytosol, ribosome’s and plasma membrane.]
2. What is the maximum total magnification of the Light microscope
Answer: Option D [1000X] [actually the exact magnification of the light microscope is 1500X, but in option 1000X is given maximum so in present answer we can choose option D. the main advantage of light microscope is that we can use it to visualize lots of samples which include whole living organisms or sections of large plants and animals.]
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.
Answer: Option B [Confocal microscope]
4.The organelle found in all eukaryotic cells that confines the DNA and keeps them separated from the cytoplasm
Answer: Option C [Nucleus] [Nucleus the brain and it contain genetic material. A well-defined nucleus is present only in the eukaryotic cells. The nuclear membrane is called nuclear membrane which separates the nucleus from the cytoplasm.]
5. Which of the following organelle have both an outer and inner membrane?
Answer: Option A [Rough ER] [Also known as RER or granular endoplasmic reticulum having ribosomes on it which synthesized the proteins. It has both inner and outer membrane.]
6.The scientific name of a flatworm, which is an excellent experimental organism used to study developmental biology is……
Answer: Option D [ C. elgans] [It is the small worm which is a non-hazardous, non-infectious, non-pathogenic, non-parasitic organism, which is extensively used for the studies and used as a model laboratory organism. It is found all parts of the world. It feeds on the bacteria.]
7. Which subatomic particles contribute to the positive charge for any given element?
Answer: Option A [Protons ]
8. The isotopes of an element are due to the different number of …..
Answer: Option B [Neutrons]
9. An ionic bond between two atoms is formed as a result of the….
Answer: Option B [transfer of electrons] [An ionic bond is formed by the transferring of electrons between metals and non-metals.]
10. What is the valence of carbon
Answer: Option D [4] [The valence means how easily an atom combines with another chemical species or in simple words how many bonds an atom can make or how many electrons it can share to achieve the stable configuration. Carbon can make 4 bonds or have 4 valences.]
11.DNA are polymers of nucleotides molecules
Answer: Option C [Nucleotide] [A nucleotides is formed by the combination of a nitrogenous base plus a sugar molecule plus one phosphoric group.]
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