Biochemistry

2400 chlorophyll molecules produce 1 oxygen molecule. This implies:

2400 chlorophyll molecules produce 1 oxygen molecule. This implies:

2400 chlorophyll molecules produce 1 oxygen molecule. This implies:
 a. All chlorophyll molecules harvest light and through a photochemical reaction convert light energy into chemical energy.
  b. Some chlorophyll molecules are inactive bu

Angela26kristin   61   1 Reply

ericpie13

25) The role of EF-Tu in bacterial protein synthesis is

25) The role of EF-Tu in bacterial protein synthesis is

25) The role of EF-Tu in bacterial protein synthesis is
A) formation of the peptide bond.
B) positioning the correct aminoacyl-tRNA at the A site.
C) positioning the correct aminoacyl-tRNA at the P site.
D) moving the mRNA by one

bkline14   356   1 Reply

bio_man

26) During protein synthesis the peptide bond is formed by

26) During protein synthesis the peptide bond is formed by

26) During protein synthesis the peptide bond is formed by
A) peptidyl transferase.
B) an RNA-catalyzed reaction.
C) a combination of peptidyl transferase and an RNA-catalyzed reaction.
D) hydrolysis of ATP.
E) hydrolysis of

bkline14   604   2 Replies

bio_man

2x + 9 = -3, x = 3

2x + 9 = -3, x = 3

2x + 9 = -3, x = 3

▸ true

▸ false

mlhickey   27   1 Reply

jaimieramirez

3 examples of synthetic compounds that contain aromatic rings

3 examples of synthetic compounds that contain aromatic rings

Three examples of synthetic compounds that contain aromatic rings.
indicate their sources or importance.

stuck on this question I get it aromatic rings another name for "Benzene Ring"
- need help explaining this TIA

angie19   2593   1 Reply

habiba

3'-Exonuclease activity of DNA polymerase I of E. coli has all the characteristics EXCEPT:

3'-Exonuclease activity of DNA polymerase I of E. coli has all the characteristics EXCEPT:

3'-Exonuclease activity of DNA polymerase I of E. coli has all the characteristics EXCEPT:
 
  a. is an editor of polymerase activity.
  b. is opposite to the polymerase activity.
  c. removes nucleotides that do not base pair at

kescobar5   37   2 Replies

kescobar5

3. By how much does the gravitational potential energy of a 64 kg pole vaulter change if his center of mass?

3. By how much does the gravitational potential energy of a 64 kg pole vaulter change if his center of mass?

3.By how much does the gravitational potential energy of a 64 kg pole vaulter change if his center of mass rises about 4.0 m during the jump?

ilikecrackers   3703   1 Reply

asjey

3.25 kcal is the same amount of energy as ________.

3.25 kcal is the same amount of energy as ________.

3.25 kcal is the same amount of energy as ________.

▸ 13600 J

▸ 0.777 J

▸ 777 J

▸ 13.6 J

▸ 3.25 J

mmora2   31   1 Reply

jaimieramirez

30S rRNA is a designation of the ____ of the RNA molecule.

30S rRNA is a designation of the ____ of the RNA molecule.

30S rRNA is a designation of the ____ of the RNA molecule.
 
  a. number of sugars
  b. sedimentation coefficient
  c. splicing coefficient
  d. sequence repeats
  e. splicing number

kristina92293   39   1 Reply

ABascomb

4300 expressed in scientific notation is 4.3 10-2.

4300 expressed in scientific notation is 4.3 10-2.

4300 expressed in scientific notation is 4.3 × 10-2.

▸ true

▸ false

CharW67   50   1 Reply

SUmmerPeople

45 is what percent of 150? (Multiple Choice)

45 is what percent of 150? (Multiple Choice)

45 is what percent of 150?
A) 0.30
B) 30
C) 0.0030
D) 3000

Neves   58   2 Replies

Neves

47.462 + 22.53 + 0.11443 (Multiple Choice Question)

47.462 + 22.53 + 0.11443 (Multiple Choice Question)

47.462 + 22.53 + 0.11443
A) 70.10643
B) 70.106
C) 70.11
D) 70.1

Neves   62   2 Replies

Neves

5-fluorouracil and 5-fluorodeoxyuridine are both prodrugs and potent inhibitors of DNA synthesis ...

5-fluorouracil and 5-fluorodeoxyuridine are both prodrugs and potent inhibitors of DNA synthesis ...

5-fluorouracil and 5-fluorodeoxyuridine are both prodrugs and potent inhibitors of DNA synthesis because they can be converted in the cell to 5-fluorodeoxyuridine monophosphate, an irreversible inhibitor of ________.

alpsi   94   2 Replies

alpsi

5-methylcytidine is a common modified base in mammalian DNA that plays roles in

5-methylcytidine is a common modified base in mammalian DNA that plays roles in

5-methylcytidine is a common modified base in mammalian DNA that plays roles in ________.
A) restriction endonucleases
B) regulation of transcription
C) chromatin assembly
D) both B and C

mikael   144   2 Replies

mikael

5-phosphoribosyl-α-D-1-pyrophosphate is a key intermediate in de novo synthesis of nucleotides but ...

5-phosphoribosyl-α-D-1-pyrophosphate is a key intermediate in de novo synthesis of nucleotides but ...

5-phosphoribosyl-α-D-1-pyrophosphate is a key intermediate in de novo synthesis of nucleotides but not in salvage pathways.
T/F?

alpsi   134   2 Replies

alpsi

5.21 cm is the same length as ________.

5.21 cm is the same length as ________.

5.21 cm is the same length as ________.

▸ 5.21 mm

▸ 0.0521 m

▸ 5210 m

▸ 52.1 dm

▸ 0.00521 km

desiree_n   59   1 Reply

courtneyrmcd

50.0 mL HCl was combined with an excess amount of Al and 1.08 L hydrogen gas was

50.0 mL HCl was combined with an excess amount of Al and 1.08 L hydrogen gas was

Hydrochloric acid reacts with aluminum to produce hydrogen gas according to the reaction below.

6 HCl(aq) + 2 Al(s) → 2 AlCl3(aq) + 3 H2(g)

50.0 mL HCl was combined with an excess amount of Al and 1.08 L hydrogen gas was produce

vanvinny   354   1 Reply

dtimmons95

50.0 mL of a 0.250 M sucrose solution was diluted to 4.00 × 102 mL. What is the concentration of ...

50.0 mL of a 0.250 M sucrose solution was diluted to 4.00 × 102 mL. What is the concentration of ...

50.0 mL of a 0.250 M sucrose solution was diluted to 4.00 × 102 mL. What is the concentration of the new solution?

Neves   188   2 Replies

Neves

6) How is carbohydrate use similar or different between plants and animals?

6) How is carbohydrate use similar or different between plants and animals?

How is carbohydrate use similar or different between plants and animals? Select the true statement below.

    A)Carbohydrates catalyze reactions in both animals and plants.  
    B)Carbohydrates play a structural role in some types of animals and i

riyachand   874   2 Replies

rixter119

60% efficiency device uses chemical energy to generate 600J of electrical energy?

60% efficiency device uses chemical energy to generate 600J of electrical energy?

How much Chemical energy is used? A second device uses twice as much chemical energy to generate half as much electric energy, what is its efficiency?

illfavor   2248   2 Replies

ilikecrackers

650 cal = 2700 J

650 cal = 2700 J

650 cal = 2700 J

▸ true

▸ false

Diamondlove   38   1 Reply

KaylaG

68. Which of the following is alanylglycine?

68. Which of the following is alanylglycine?

68. Which of the following is alanylglycine?
  a.
   
 

lacinb30   55   2 Replies

lacinb30

7TM is an abbreviation for _______________________ receptors.

7TM is an abbreviation for _______________________ receptors.

7TM is an abbreviation for _______________________ receptors.

tulao68   52   1 Reply

iFISH

9.31 g is the same mass as ________.

9.31 g is the same mass as ________.

9.31 g is the same mass as ________.

▸ 931 μg

▸ 93.1 cg

▸ 931 kg

▸ 9310 mg

▸ 0.0931 dg

jazzygirl   47   1 Reply

FloraFitzw

A -barrel would most likely be composed of ____.

A -barrel would most likely be composed of ____.

A -barrel would most likely be composed of ____.
 
  a. parallel -sheets connected by regions of -helix
  b. parallel -sheets connected by -turns.
  c. parallel -sheets connected by regions of random coil.
  d. parallel -she

motee   43   1 Reply

mwarner93

A 1,2-diacylglycerol that has a phosphate group esterified at carbon atom 3 of the glycerol is a: ...

A 1,2-diacylglycerol that has a phosphate group esterified at carbon atom 3 of the glycerol is a: ...

A 1,2-diacylglycerol that has a phosphate group esterified at carbon atom 3 of the glycerol is a:
 a. cardiolipin
  b. tristearin
  c. sphingomyelin
  d. terpene
  e. glycerophospholipid

motee   49   2 Replies

motee

A 1,2-diacylglycerol that has a phosphate group esterified at carbon atom 3 of the glycerol is a: ...

A 1,2-diacylglycerol that has a phosphate group esterified at carbon atom 3 of the glycerol is a: ...

A 1,2-diacylglycerol that has a phosphate group esterified at carbon atom 3 of the glycerol is a:
 a. cardiolipin
 b. tristearin
 c. sphingomyelin
 d. terpene
 e. glycerophospholipid

adamsnaya   49   1 Reply

ravindergill185

A 1.0 M solution of an acid with a pKa of 5.65 has higher [H3O+] than a 1.0 M solution of an acid ...

A 1.0 M solution of an acid with a pKa of 5.65 has higher [H3O+] than a 1.0 M solution of an acid ...

A 1.0 M solution of an acid with a pKa of 5.65 has higher [H3O+] than a 1.0 M solution of an acid with pH of 6.75.
Pick whether it's true or false...

Neves   454   3 Replies

Cesar Fujiwara

A 10-year-old with precocious puberty is found to have a space-occupying tumor in the arcuate nucleu

A 10-year-old with precocious puberty is found to have a space-occupying tumor in the arcuate nucleu

A 10-year-old with precocious puberty is found to have a space-occupying tumor in the arcuate nucleus of the hypothalamus, leading to excessive prolactin release. Which of the following correctly describes changes in plasma levels of hormones?
A

SalwanJ   222   2 Replies

SalwanJ

A 100-mg technetium-99m sample is used in a medical study. How much of the Technetium-99m sample ...

A 100-mg technetium-99m sample is used in a medical study. How much of the Technetium-99m sample ...

A 100-mg technetium-99m sample is used in a medical study. How much of the Technetium-99m sample remains after 24 hours? The half-life of Tc-99m is 6 hours.

Neves   122   2 Replies

Neves

A 12-g sample of cooking oil, which is a fat, contains ________ kcal. (Round to the tens place.)

A 12-g sample of cooking oil, which is a fat, contains ________ kcal. (Round to the tens place.)

A 12-g sample of cooking oil, which is a fat, contains ________ kcal. (Round to the tens place.)

your lady   180   1 Reply

jiran50

A 150 lb man has approximately what volume of whole blood in his body?

A 150 lb man has approximately what volume of whole blood in his body?

A 150 lb man has approximately what volume of whole blood in his body?
 a. 3 L c. 9 L
  b. 6 L d. 12 L

lacinb30   37   1 Reply

steffers12

A 19-year-old male client presents with rheumatoid arthritis. The client has a tall, lanky body, ...

A 19-year-old male client presents with rheumatoid arthritis. The client has a tall, lanky body, ...

A 19-year-old male client presents with rheumatoid arthritis. The client has a tall, lanky body, sparse facial hair. He complains of decreased physical endurance. How could a diagnosis of Klinefelter syndrome be confirmed in the client?
 

slapaburger   35   1 Reply

WillGross3

A 20-year-old man died following a car collision which caused sudden deceleration injury of the ...

A 20-year-old man died following a car collision which caused sudden deceleration injury of the ...

A 20-year-old man died following a car collision which caused sudden deceleration injury of the thorax. Massive bleeding was found at the autopsy. The most likely source of this bleeding was the
 
  A. left ventricle
  B. left atrium

SnowQueen   32   1 Reply

irina99

A 23-year-old woman was bitten by a tick during a camping trip in the Rocky Mountains. Upon return ...

A 23-year-old woman was bitten by a tick during a camping trip in the Rocky Mountains. Upon return ...

A 23-year-old woman was bitten by a tick during a camping trip in the Rocky Mountains. Upon return from the trip, she developed fever accompanied by migratory erythema.
 
  These symptoms subsided, but then she developed pains in both arms

strobro   51   1 Reply

Kojico

A 25-year-old man with short limbs has achondroplasia. No one in his family has had the disease. He ...

A 25-year-old man with short limbs has achondroplasia. No one in his family has had the disease. He ...

A 25-year-old man with short limbs has achondroplasia. No one in his family has had the disease. He married a woman of normal height and wanted to know their chances of having a child with the same disease. As a consultant you say that
 
 

Skoochy   32   1 Reply

tdubb1992

A 25-year-old woman developed septicemia accompanied by the appearance of an exfoliating rash on her ...

A 25-year-old woman developed septicemia accompanied by the appearance of an exfoliating rash on her ...

A 25-year-old woman developed septicemia accompanied by the appearance of an exfoliating rash on her palms and soles. Subsequent studies found that this toxic shock syndrome (TSS) was related to a bacterial colonization of the vaginal tampon.
 

bribery   40   1 Reply

ruff

A 28-year-old woman complained of blurry vision, tingling in her fingers, and weakness in both legs. ...

A 28-year-old woman complained of blurry vision, tingling in her fingers, and weakness in both legs. ...

A 28-year-old woman complained of blurry vision, tingling in her fingers, and weakness in both legs. Magnetic resonance imaging revealed numerous plaques in the cerebral white matter. The cerebrospinal fluid analysis most likely will show
 

nameless23   63   1 Reply

m7md9078

A 29-year-old client had a Papanicolaou smear performed during her most recent visit to her primary ...

A 29-year-old client had a Papanicolaou smear performed during her most recent visit to her primary ...

A 29-year-old client had a Papanicolaou smear performed during her most recent visit to her primary care provider. This diagnostic procedure aims to identify:
 
  A) Atypical cervix cellular changes
  B) Human papillomavirus (HPV) ant

RENCEE72   39   2 Replies

RENCEE72

A 35-year-obese man complaining of dysphagia was found to have a hiatal hernia and esophagitis. This ...

A 35-year-obese man complaining of dysphagia was found to have a hiatal hernia and esophagitis. This ...

A 35-year-obese man complaining of dysphagia was found to have a hiatal hernia and esophagitis. This inflammation is most likely caused by
 
  A. gastric acid
  B. viruses
  C. fungi
  D. bacteria
  E. protozoa

alexisblack   63   1 Reply

suarezs1