Escherichia coli fully labelled with 15N is allowed to grow in 14N medium. The two strands of DNA molecule of the first generation bacteria have (a) different density and do not resemble parent DNA (b) different density but resemble parent DNA (c) same density and resemble parent DNA (d) same density but do not resemble parent DNA.

Escherichia coli fully labelled with 15N is allowed
to grow in 14N medium. The two strands of DNA
molecule of the first generation bacteria have
(a) different density and do not resemble parent
DNA
(b) different density but resemble parent DNA
(c) same density and resemble parent DNA
(d) same density but do not resemble parent DNA.
by

1 Answer

Answer :

(c) same density and resemble parent DNA
by

Related questions

Escherichia coli fully labelled with 15N is allowed to grow in 14N medium. The two strands of DNA molecule of the first generation bacteria have (a) different density and do not resemble parent DNA (b) different density but resemble parent DNA (c) same density and resemble parent DNA (d) same density but do not resemble parent DNA.

Description : Escherichia coli fully labelled with 15N is allowed to grow in 14N medium. The two strands of DNA molecule of the first generation bacteria have (a) different density and do not resemble parent DNA ( ... DNA (c) same density and resemble parent DNA (d) same density but do not resemble parent DNA.

Last Answer : (a) different density and do not resemble parent DNA

How do you find n (missing numbers in equivelent fractions) 1. 310ths n50 2. 29ths 14n 3.1218ths n36 4. 3038ths 15n 5. 6066ths n22 (hurry im on a school quiz TYSSM!!)?

Description : How do you find n (missing numbers in equivelent fractions) 1. 310ths n50 2. 29ths 14n 3.1218ths n36 4. 3038ths 15n 5. 6066ths n22 (hurry im on a school quiz TYSSM!!)?

Last Answer : You may be in a hurry, but we aren't going to help you cheat. Our doing your work doesn't help you because you won't learn what you need to learn for the test that will have the same problem. Get to work.

Polluted water usually contains coliform bacteria like _____. a. Streptococcus b. Proteus c. Escherichia coli d. Pseudomonas

Description : Polluted water usually contains coliform bacteria like _____. a. Streptococcus b. Proteus c. Escherichia coli d. Pseudomonas

Last Answer : c. Escherichia coli

The bacteria which is predominant flora of the human gut is A- Escherichia coli B- Clostridium perfringens C- Bacteroides D- Actinomyces

Description : The bacteria which is predominant flora of the human gut is A- Escherichia coli B- Clostridium perfringens C- Bacteroides D- Actinomyces

Last Answer : Clostridium perfringens

Semi-conservative replication of DNA was first demonstrated in (a) Escherichia coli (b) Streptococcus pneumoniae (c) Salmonella typhimurium (d) Drosophila melanogaster.

Description : Semi-conservative replication of DNA was first demonstrated in (a) Escherichia coli (b) Streptococcus pneumoniae (c) Salmonella typhimurium (d) Drosophila melanogaster.

Last Answer : (c) Salmonella typhimurium

Experimental material in the study of DNA replication has been (a) Escherichia coli (b) Neurospora crassa (c) Pneumococcus (d) Drosophila melanogaster.

Description : Experimental material in the study of DNA replication has been (a) Escherichia coli (b) Neurospora crassa (c) Pneumococcus (d) Drosophila melanogaster.

Last Answer : Pneumococcus

Antiparallel strands of a DNA molecule means that (a) one strand turns clockwise (b) one strand turns anti-clockwise (c) the phosphate groups of two DNA strands, at their ends, share the same position (d) the phosphate groups at the start of two DNA strands are in opposite position (pole).

Description : Antiparallel strands of a DNA molecule means that (a) one strand turns clockwise (b) one strand turns anti-clockwise (c) the phosphate groups of two DNA strands, at their ends, share the same position (d) the phosphate groups at the start of two DNA strands are in opposite position (pole).

Last Answer : (d) the phosphate groups at the start of two DNA strands are in opposite position (pole).

Give reason: The two strands of DNA molecule are complementary to each other but are not identical.

Description : Give reason: The two strands of DNA molecule are complementary to each other but are not identical.

Last Answer : The two strands of DNA are not identical because the nitrogenous bases are different in pairing. A purine base of one polynucleotide chain always pairs with a pyramidine base on the other. Adenine (A) pairs ... and Cytosine (C) pairs with Thymine (T). Hence the two strands of DNA are complementary.

In the semiconservative method of replication a. Both parent strands are degraded. b. One parent strand is conserved in each of the the new dna. c. Both parent strands reform with one another. d. Okazaki fragments form both of the new molecules of DNA.

Description : In the semiconservative method of replication a. Both parent strands are degraded. b. One parent strand is conserved in each of the the new dna. c. Both parent strands reform with one another. d. Okazaki fragments form both of the new molecules of DNA.

Last Answer : b. One parent strand is conserved in each of the the new dna.

Following statements describe the characteristics of the enzyme restriction endonuclease. Identify the incorrect statement. (a) The enzyme recognises a specific palindromic nucleotide sequence in the DNA. (b) The enzyme cuts DNA molecule at identified position within the DNA. (c) The enzyme binds DNA at specific sites and cuts only one of the two strands. (d) The enzyme cuts the sugar-phosphate backbone at specific sites on each strand.

Description : Following statements describe the characteristics of the enzyme restriction endonuclease. Identify the incorrect statement. (a) The enzyme recognises a specific palindromic nucleotide sequence in the DNA. (b) ... (d) The enzyme cuts the sugar-phosphate backbone at specific sites on each strand.

Last Answer : (c) The enzyme binds DNA at specific sites and cuts only one of the two strands.

n the DNA molecule, (a) the proportion of adenine in relation to thymine varies with the organism (b) there are two strands which run anti- parallel-one in 5′ → 3′ direction and other in 3′ → 5′ (c) the total amount of purine nucleotides and pyrimidine nucleotides is not always equal (d) there are two strands which run parallel in the 5′ → 3′ direction.

Description : n the DNA molecule, (a) the proportion of adenine in relation to thymine varies with the organism (b) there are two strands which run anti- parallel-one in 5′ → 3′ direction and other in 3′ → ... is not always equal (d) there are two strands which run parallel in the 5′ → 3′ direction.

Last Answer : (b) there are two strands which run anti- parallel-one in 5′ → 3′ direction and other in 3′ → 5′

During transcription, do both strands of DNA get transcribed into a double stranded RNA molecule?

Description : During transcription, do both strands of DNA get transcribed into a double stranded RNA molecule?

Last Answer : No. RNA is single stranded and is transcribed from only one of the DNA strands. DNA replication does make copies of both strands.

What was the first bacterial genome to be sequenced and made public? A- Bacillus subtilis B- Escherichia coli C- Haemophilus influenza D- No bacterial genome has been sequenced yet

Description : What was the first bacterial genome to be sequenced and made public? A- Bacillus subtilis B- Escherichia coli C- Haemophilus influenza D- No bacterial genome has been sequenced yet

Last Answer : Haemophilus influenza

What was the first bacterial genome to be sequenced and made public? A- Bacillus subtilis B- Escherichia coli C- Haemophilus influenza D- No bacterial genome has been sequenced yet

Description : What was the first bacterial genome to be sequenced and made public? A- Bacillus subtilis B- Escherichia coli C- Haemophilus influenza D- No bacterial genome has been sequenced yet

Last Answer : Haemophilus influenza

What was the first bacterial genome to be sequenced and made public? A- Bacillus subtilis B- Escherichia coli C- Haemophilus influenza D- No bacterial genome has been sequenced yet

Description : What was the first bacterial genome to be sequenced and made public? A- Bacillus subtilis B- Escherichia coli C- Haemophilus influenza D- No bacterial genome has been sequenced yet

Last Answer : Haemophilus influenza

Two microbes found to be very useful in genetic engineering are (a) crown gall bacterium and Caenorhabditis elegans (b) Escherichia coli and Agrobacterium tumefaciens (c) Vibrio cholerae and a tailed bacteriophage (d) Diplococcus sp. and Pseudomonas sp

Description : Two microbes found to be very useful in genetic engineering are (a) crown gall bacterium and Caenorhabditis elegans (b) Escherichia coli and Agrobacterium tumefaciens (c) Vibrio cholerae and a tailed bacteriophage (d) Diplococcus sp. and Pseudomonas sp

Last Answer : (b) Escherichia coli and Agrobacterium tumefaciens

Assertion : Escherichia coli, Shigella sp. And salmonella sp. Are all responsible for diarrhoeal diseases. Reason : Dehydration is common to all types

Description : Assertion : Escherichia coli, Shigella sp. And salmonella sp. Are all responsible for diarrhoeal diseases. Reason : Dehydration is common to all types

Last Answer : Assertion : Escherichia coli, Shigella sp. And salmonella sp. Are all responsible for diarrhoeal ... If both the assertion and reason are false

A man has an Escherichia coli bacteremia with a low-grade fever (101.6°F). Appropriate management of his fever would be (a) Give acetaminophen 650 mg orally every 4 hours (b) Give aspirin 650 mg orally every 4 hours (c) Give alternating doses of aspirin and acetaminophen every 4 hours (d) Withhold antipyretics, and use the fever curve to monitor his response to antibiotic therapy (e) Use tepid water baths to reduce the fever

Description : A man has an Escherichia coli bacteremia with a low-grade fever (101.6°F). Appropriate management of his fever would be (a) Give acetaminophen 650 mg orally every 4 hours (b) Give aspirin 650 ... fever curve to monitor his response to antibiotic therapy (e) Use tepid water baths to reduce the fever

Last Answer : Ans: D

Which of the following organisms is notorious for developing antimicrobial resistance rapidly ? (a) Streptococcus pyogenes (b) Meningococcus (c) Treponema pallidum (d) Escherichia coli

Description : Which of the following organisms is notorious for developing antimicrobial resistance rapidly ? (a) Streptococcus pyogenes (b) Meningococcus (c) Treponema pallidum (d) Escherichia coli

Last Answer : Ans: D

What is the disease caused by Escherichia coli 0157 ?

Description : What is the disease caused by Escherichia coli 0157 ?

Last Answer : H7? Haemorrhagic colitis

Organism contaminating the eggs in the nest is A A. Escherichia coli B. Mycoplasma gallisepticum C. Pasturella multocida D. None of the these

Description : Organism contaminating the eggs in the nest is A A. Escherichia coli B. Mycoplasma gallisepticum C. Pasturella multocida D. None of the these

Last Answer : Escherichia coli

.Match items in column I with those in columnII. Column I Column II (A) Peritrichous flagellation (J) Ginkgo (B) Living fossil (K) Macrocystis (C) Rhizophore (L) Escherichia coli (D) Smallest flowering plant (M) Selaginella (E) Largest perennial alga (N) Wolffia Select the correct answer from the following. (a) A - L; B - J; C - M; D - N; E - K (b) A - K; B - J; C - L; D - M; E - N (c) A - N; B - L; C - K; D - M; E - J (d) A - J; B - K; C - N; D - L; E - M

Description : .Match items in column I with those in columnII. Column I Column II (A) Peritrichous flagellation (J) Ginkgo (B) Living fossil (K) Macrocystis (C) Rhizophore (L) Escherichia coli (D) Smallest flowering plant (M) Selaginella (E) Largest perennial ... - M; E - J (d) A - J; B - K; C - N; D - L; E - M

Last Answer : (a) A - L; B - J; C - M; D - N; E - K

Which one of the following organisms is not an eukaryote? (a) Paramecium caudatum (b) Escherichia coli (c) Euglena viridis (d) Amoeba proteus

Description : Which one of the following organisms is not an eukaryote? (a) Paramecium caudatum (b) Escherichia coli (c) Euglena viridis (d) Amoeba proteus

Last Answer : (b) Escherichia coli

Escherichia coli is used extensively in biological research as it is (a) easily cultured (b) easily available (c) easy to handle (d) easily multiplied in host.

Description : Escherichia coli is used extensively in biological research as it is (a) easily cultured (b) easily available (c) easy to handle (d) easily multiplied in host.

Last Answer : (a) easily cultured

Which organism is found in the acidic vagina of women of reproductive age? a. Candida albicans b. Lactobacillus c. Escherichia coli. d. Staphylococcus epidermidis

Description : Which organism is found in the acidic vagina of women of reproductive age? a. Candida albicans b. Lactobacillus c. Escherichia coli. d. Staphylococcus epidermidis

Last Answer : b. Lactobacillus

: All the following are among the opportunistic organisms that may cause nosocomial disease except: a. Pseudomonas aeruginosa. b. Escherichia coli. c. Staphylococcus aureus. d. Mycobacterium leprae.

Description : : All the following are among the opportunistic organisms that may cause nosocomial disease except: a. Pseudomonas aeruginosa. b. Escherichia coli. c. Staphylococcus aureus. d. Mycobacterium leprae.

Last Answer : d. Mycobacterium leprae.

The most common cause of an invasive wound infection, such as a burn, is a. gram-positive bacterial species. b. treponema pallidum. c. Pseudomonas aeruginosa. d. Escherichia coli.

Description : The most common cause of an invasive wound infection, such as a burn, is a. gram-positive bacterial species. b. treponema pallidum. c. Pseudomonas aeruginosa. d. Escherichia coli.

Last Answer : c. Pseudomonas aeruginosa.

Hemorrhagic colitis and hemolytic uremic syndrome are associated with a. Helicobacter Pylori. b. Staphylococcus Aureus. c. Escherichia Coli. d. Salmonella Typhi.

Description : Hemorrhagic colitis and hemolytic uremic syndrome are associated with a. Helicobacter Pylori. b. Staphylococcus Aureus. c. Escherichia Coli. d. Salmonella Typhi.

Last Answer : c. Escherichia Coli.

Gastric ulcer disease is caused by a. Helicobacter pylori. b. Yersinia entercolitica. c. Escherichia coli. d. Salmonella Typh

Description : Gastric ulcer disease is caused by a. Helicobacter pylori. b. Yersinia entercolitica. c. Escherichia coli. d. Salmonella Typh

Last Answer : a. Yersinia pestis.

This gram-positive rod can cause meningoencephalitis, septicemia, and newborn meningitis. a. Bacillus cereus b. Listeria monocyto genes c. Clostridium peringens d. Escherichia coli

Description : This gram-positive rod can cause meningoencephalitis, septicemia, and newborn meningitis. a. Bacillus cereus b. Listeria monocyto genes c. Clostridium peringens d. Escherichia coli

Last Answer : b. Listeria monocyto genes

Escherichia coli is a common gram that can be a cause of a. positive rod; hemorrhagic colitis b. negative rod; traveler‘s diarrhea c. positive coccus; typhoid fever d. negative rod; cholera

Description : Escherichia coli is a common gram that can be a cause of a. positive rod; hemorrhagic colitis b. negative rod; traveler‘s diarrhea c. positive coccus; typhoid fever d. negative rod; cholera

Last Answer : b. negative rod; traveler‘s diarrhea

Which one of the following bacterial species is NOT a cause of food poisoning (noninflammatory gastroenteritis)? a. Escherichia coli b. Bacillus cereus c. Staphylococcus aureus d. Clostridium perfringens

Description : Which one of the following bacterial species is NOT a cause of food poisoning (noninflammatory gastroenteritis)? a. Escherichia coli b. Bacillus cereus c. Staphylococcus aureus d. Clostridium perfringens

Last Answer : a. Escherichia coli

Hemorrhagic colitis and hemolytic uremic syndrome are associated with a. Helicobacter Pylori. b. Staphylococcus Aureus. c. Escherichia Coli. d. Salmonella Typhi.

Description : Hemorrhagic colitis and hemolytic uremic syndrome are associated with a. Helicobacter Pylori. b. Staphylococcus Aureus. c. Escherichia Coli. d. Salmonella Typhi.

Last Answer : c. Escherichia Coli.

Gastric ulcer disease is caused by a. Helicobacter pylori. b. Yersinia entercolitica. c. Escherichia coli. d. Salmonella Typhi.

Description : Gastric ulcer disease is caused by a. Helicobacter pylori. b. Yersinia entercolitica. c. Escherichia coli. d. Salmonella Typhi.

Last Answer : a. Helicobacter pylori.

This gram-positive rod can cause meningoencephalitis, septicemia, and newborn meningitis. a. Bacillus cereus b. Listeria monocyto genes c. Clostridium peringens d. Escherichia coli

Description : This gram-positive rod can cause meningoencephalitis, septicemia, and newborn meningitis. a. Bacillus cereus b. Listeria monocyto genes c. Clostridium peringens d. Escherichia coli

Last Answer : b. Listeria monocyto genes

Escherichia coli is a common gram that can be a cause of a. positive rod; hemorrhagic colitis b. negative rod; traveler‘s diarrhea c. positive coccus; typhoid fever d. negative rod; cholera

Description : Escherichia coli is a common gram that can be a cause of a. positive rod; hemorrhagic colitis b. negative rod; traveler‘s diarrhea c. positive coccus; typhoid fever d. negative rod; cholera

Last Answer : b. negative rod; traveler‘s diarrhea

Which one of the following bacterial species is NOT a cause of food poisoning (noninflammatory gastroenteritis)? a. Escherichia coli b. Bacillus cereus c. Staphylococcus aureus d. Clostridium perfringens

Description : Which one of the following bacterial species is NOT a cause of food poisoning (noninflammatory gastroenteritis)? a. Escherichia coli b. Bacillus cereus c. Staphylococcus aureus d. Clostridium perfringens

Last Answer : a. Escherichia coli

The figure below shows the structure of a mitochondrion with its four parts labelled A, B, C and D. Select the part correctly matched with its function. D B A C (a) D (outer membrane) – gives rise to inner membrane by splitting (b) B (inner membrane) – forms infoldings called cristae (c) C (crista) – possesses single circular DNA molecule and ribosomes (d) A (matrix) – major site for respiratory chain enzyme

Description : The figure below shows the structure of a mitochondrion with its four parts labelled A, B, C and D. Select the part correctly matched with its function. D B A C (a) D (outer ... possesses single circular DNA molecule and ribosomes (d) A (matrix) - major site for respiratory chain enzyme

Last Answer : (b) B (inner membrane) – forms infoldings called cristae

.E.coli cells with a mutated z gene of the lac operon cannot grow in medium containing only lactose as the source of energy because (a) the lac operon is constitutively active in these cells (b) they cannot synthesise functional beta galactosidase (c) in the presence of glucose, E.coli cells do not utilise lactose (d) they cannot transport lactose from the medium into the cell.

Description : .E.coli cells with a mutated z gene of the lac operon cannot grow in medium containing only lactose as the source of energy because (a) the lac operon is constitutively active in these cells ( ... coli cells do not utilise lactose (d) they cannot transport lactose from the medium into the cell.

Last Answer : (b) they cannot synthesise functional beta galactosidase

two soccer players kick the same 2-kg ball at the same time in opposite directions One kicks with a force of 15N the other kicks with a force of 5N. what is the resulting acceleration of the ball, in m/s2?

Description : two soccer players kick the same 2-kg ball at the same time in opposite directions One kicks with a force of 15N the other kicks with a force of 5N. what is the resulting acceleration of the ball, in m/s2?

Last Answer : 5

Why does it seem so important to some people that children resemble each other or a parent?

Description : Why does it seem so important to some people that children resemble each other or a parent?

Last Answer : answer:Validation. Validation that my gene pool survived, the closest I can get to typical ideals of immortality. And validation that my Ever Lovin’ didn’t spoon with the mailman.

The structure of DNA is a double helix formed by two strands of DNA sequence. This sequence consists of 4 different nucleotides- Adenine, Thymine, Cytosine and Guanine. How do the nucleotides on one strand interact with the nucleotides on the second strand to maintain the helical shape of DNA?

Description : The structure of DNA is a double helix formed by two strands of DNA sequence. This sequence consists of 4 different nucleotides- Adenine, Thymine, Cytosine and Guanine. How do the nucleotides on one strand interact with the nucleotides on the second strand to maintain the helical shape of DNA?

Last Answer : Complementary Base Pairing. Adenine complementary base pairs with Thymine and Guanine complementary base pairs with Cytosine.

Two bacteria found to be very useful in genetic engineering experiments are (a) Nitrobacter and Azotobacter (b) Rhizobium and Diplococcus (c) Nitrosomonas and Klebsiella (d) Escherichia and Agrobacterium.

Description : Two bacteria found to be very useful in genetic engineering experiments are (a) Nitrobacter and Azotobacter (b) Rhizobium and Diplococcus (c) Nitrosomonas and Klebsiella (d) Escherichia and Agrobacterium.

Last Answer : (d) Escherichia and Agrobacterium.

Which of the following gram-negative bacteria is/are not aerobic? A.Pseudomonas B.Neisseria C.Escherichia D.None of these

Description : Which of the following gram-negative bacteria is/are not aerobic? A.Pseudomonas B.Neisseria C.Escherichia D.None of these

Last Answer : C.Escherichia

Which of the following gram-negative bacteria is/are not aerobic? A.Pseudomonas B.Neisseria C.Escherichia D.None of these

Description : Which of the following gram-negative bacteria is/are not aerobic? A.Pseudomonas B.Neisseria C.Escherichia D.None of these

Last Answer : C.Escherichia

Carbon-14 dating is based on the decay of 14C to 14N. What type of radioactive decay is associated with this nuclear reaction?

Description : Carbon-14 dating is based on the decay of 14C to 14N. What type of radioactive decay is associated with this nuclear reaction? 

Last Answer : ANSWER: b-RAY or b DECAY or ELECTRON EMISSION

In the light of recent classification of living organisms into three domains of life (bacteria, archaea and eukarya), which one of the following statements is true about archaea? (a) Archaea completely differ from both prokaryotes and eukaryotes. (b) Archaea completely differ from prokaryotes. (c) Archaea resemble eukarya in all respects. (d) Archaea have some novel features that are absent in other prokaryotes and eukaryotes.

Description : In the light of recent classification of living organisms into three domains of life (bacteria, archaea and eukarya), which one of the following statements is true about archaea? (a) Archaea ... respects. (d) Archaea have some novel features that are absent in other prokaryotes and eukaryotes.

Last Answer : (d) Archaea have some novel features that are absent in other prokaryotes and eukaryote

$ The two strands of DNA run in an antiparallel directions DNA is formed of Deoxyribose sugar. Phosphorus and nitrogen bases called purines and pyrimi

Description : $ The two strands of DNA run in an antiparallel directions DNA is formed of Deoxyribose sugar. Phosphorus and nitrogen bases called purines and pyrimi

Last Answer : $ The two strands of DNA run in an antiparallel directions DNA is formed of Deoxyribose sugar. Phosphorus and ... wrong D. If both As and R are wrong.

The two strands of the DNA double helix are held together by (a) Hydrogen bonds (b)C=C double bonds (c) Hydrophobic bonds (d) Peptide bonds

Description : The two strands of the DNA double helix are held together by (a) Hydrogen bonds (b)C=C double bonds (c) Hydrophobic bonds (d) Peptide bonds

Last Answer : Ans:(a)

The figure below shows three steps (A, B, C) of Polymerase Chain Reaction (PCR). Select the option giving correct identification together with what it represents? A. B. C ds DNA 3 5 5 3 5 3 5 3 5 3 5 3 5 5 3 3 5 3 5 3 Region to be amplified . (a) B - denaturation at a temperature of about 98°C separating the two DNA strands (b) A - denaturation at a temperature of about 50°C (c) C - extension in the presence of heat stable DNA polymerase (d) A - annealing with two sets of primers

Description : The figure below shows three steps (A, B, C) of Polymerase Chain Reaction (PCR). Select the option giving correct identification together with what it represents? A. B. C ds DNA 3 5 5 3 ... - extension in the presence of heat stable DNA polymerase (d) A - annealing with two sets of primers

Last Answer : (c) C - extension in the presence of heat stable DNA polymerase