Which of the following observations is not used as evidence to support the concept of endosymbiotic origin of chloroplasts and mitochondria? A. Both have their own DNA B. Both have their own ribosomes C. Both strongly resemble prokaryotes, especially in size D. Both can live and function independently of the cell.... The fluid matrix of a cell is called the A. nucleus B. cytosol C. cytoskeleton D. endoplasmic reticulum.... In plant cells, which of the following is not a function of the large central vacuoles of plant cells? A. Storage of food B. Support C. Contractile regulation of D. Waste storage water content Which of the following can be found as a part of the mitochondrial matrix? A. Ribosomes B. DNA....

Both plant and animal cell possess A. cell walls B. mitochondria C. central vacuoles D. chloroplast The cellular organelle associated with secretion is the A. golgi complex B. mitochondrion C. ribosome D. lysosome Which of the following statements about mitochondrial proteins is true? A. All mitochondrial proteins are coded for and synthesized in the mitochondria B. Some mitochondrial proteins are coded for and synthesized in the mitochondria and others C. All mitochondrial proteins are imported from the cytoplasm D. Mitochondrial proteins arise from other mitochondrial proteins....

A cell without cell wall is called A. apoplast B. protoplast C. symplast D. none of these.... Chemical energy is supplied to eukaryotic cells by A. chloroplasts and golgi complexes B. mitochondria and ribosomes C. mitochondria only D. mitochondria and chloroplasts.... Which part of a plant contains the male sex cell? A. Ova B. Style C. Stamen D. Pollen....

Which of the following functional groups would make a carbon-based compound the least polar? A. Phosphate B. Methyl C. Carboxyl D. Amino.... Which is not true about a photon? A. It is a packet of light energy B. The shorter the wavelength, the greater the energy of the photons C. It is trapped by photosynthetic unit D. It donates electron to reduce carbon dioxide to glucose... If the ends of the following polysaccharide are pulled, which one would stretch the most? A. Glycogen B. Starch C. Cellulose D. None of these.....

The first therapeutic product formed by means of recombinant DNA technology is A. human growth hormone B. insulin C. hepatitis B vaccine D. vaccine for foot and mouth disease..... Which one of the following capsid protein of picorna virus is immunogenic in nature? A. VP1 B. VP2 C. VP3 D. VP4....... Recombinant vaccine for HBV was produced by cloning viral genes in A. plasmids B. cosmids C. autonomously replicating plasmid of yeast D. phagemids..... The promoter used for cloning HBV surface antigen is A. galactokinase B. alcohol dehydrogenase 1 C. β-galactosidase D. polyhedrin......

The piece of equipment, that introduces DNA into cells via DNA-coated microprojectiles is known as A. laser B. DNA probe C. gene gun D. inoculating needle An animal, that has gained new genetic information from the acquisition of foreign DNA, is considered as A. a chimera B. a transgenic animal C. a vector D. an enzyme that links DNA molecules The advantage of using DNA polymerases from thermophilic organisms in PCR is that A. the DNA polymerases of these bacteria are much faster than those from other organisms B. the DNA polymerases of these bacteria can withstand the high temperatures needed to denature the DNA strands......

Which of the following is not commonly used as vector? A. Artificial chromosome B. Cosmid C. Fungi D. Plasmid A short molecule containing 2-20 nucleotide is A. plasmid B. vector C. oligonucleotide D. mononucleotide....... Enzymes that recognize and cleave specific 4 to 8 base pair sequences of DNA are A. DNA ligase B. helicases C. restriction endonucleases D. DNA gyrase.... Charged molecules are separated based on varying rates of migration through a solid matrix when subjected to an electric field. This technique is known as A. photoreactivation B. gel electrophoresis C. autoradiography D. blotting........ Which of the following vector can maintain the largest fragment of foreign DNA? A. YAC B. Cosmid

A molecular technique in which DNA sequences between two oligonucleotide primers can be amplified is known as A. southern blotting B. northern blotting C. polymerase chain reaction D. DNA replication... The Southern blotting technique depends on A. similarities between the sequences of probe DNA and experimental DNA B. similarities between the sequences of probe RNA and experimental RNA C. similarities between the sequences of probe protein and experimental protein D. the molecular mass of proteins... Problems in obtaining large amounts of proteins encoded by recombinant genes can often be overcome by using A. BACS B. expression vectors C. YACS D. all of these....

Cây xanh ở đâu nhiều nhất? a. Rừng nhiệt đới b. Rừng Taiga c. Rừng Amazon..... Vào mùa đông ở xứ lạnh, khi các mặt hồ và dòng sông đóng băng, cá sẽ đi đâu? a. Sống ở tầng nước dưới. b. Chuyển đi nơi khác, hết lạnh cá lại về. c. Cá chết hết. d. Thành cá đông lạnh...... Muỗi thường đốt người là muỗi đực hay muỗi cái? a. Muỗi cái b. Muỗi đực c. Cả hai d. Không thể phân biệt được giới tính của muỗi....

Màu da của khủng long: a. Không được duy trì trong hóa thạch b. Thường có màu đất c. Rất sặc sỡ d. Phụ thuộc vào nhiệt độ môi trường....... Khủng long bị tuyệt chủng như thế nào? a. Bị con người săn đến cạn kiệt. b. Bị một virus chết tấn công. c. Bị quét sạch bởi một vụ va chạm thiên thạch. d. Vì chúng không thành công theo lý thuyết tiến hoá........ Loài động vật nào có da dày nhất? a. Voi b. Tê giác......