General Biology

Purple sulfur bacteria are organisms capable of photosynthesis. They get their name, in part, ...

Purple sulfur bacteria are organisms capable of photosynthesis. They get their name, in part, ...

Purple sulfur bacteria are organisms capable of photosynthesis. They get their name, in part, because they use H2S (hydrogen sulfide) instead of water during the light reactions. In what form would you expect to find sulfur (S) as a result of photosy

gerti   50   1 Reply

RichardSoags

What nucleotide sequence would be found on the partner DNA strand of the strand shown?

What nucleotide sequence would be found on the partner DNA strand of the strand shown?

What nucleotide sequence would be found on the partner DNA strand of the strand shown?

 
A) ACTGT
B) UGAGA
C) TGACA
D) TGUGU

gerti   104   1 Reply

aaronF1234

Scientists are attempting to make a chicken look like a dinosaur ("dino-chicken") by using drugs ...

Scientists are attempting to make a chicken look like a dinosaur ("dino-chicken") by using drugs ...

Scientists are attempting to make a chicken look like a dinosaur ("dino-chicken") by using drugs or proteins to turn on certain homeotic genes during the development of a chicken embryo. If the scientists are successful in creating both male and fema

gerti   67   1 Reply

Marvinbog

The Mesozoic era is often called the age of reptiles. Which of the following also occurred during this era?

The Mesozoic era is often called the age of reptiles. Which of the following also occurred during this era?

The Mesozoic era is often called the age of reptiles. Which of the following also occurred during this era?
A) the origin of animals in the oceans
B) the appearance of the first plants on land
C) the appearance of the first animals (tetrapods and ins

gerti   37   1 Reply

Marostegui

It is estimated that the modern continents began to take shape

It is estimated that the modern continents began to take shape

It is estimated that the modern continents began to take shape
A) 1.3 million years ago.
B) 650 million years ago.
C) 65 million years ago.
D) 6,000 years ago.

gerti   39   1 Reply

cliffy420

The Himalayas are an example of a mountain range that formed as a result of

The Himalayas are an example of a mountain range that formed as a result of

The Himalayas are an example of a mountain range that formed as a result of
A) the collision of two continental plates.
B) the separation of two continental plates.
C) the buildup of sediments and conversion to rock.
D) volcanic eruptions.

gerti   61   1 Reply

sanjidhaa

During the Cambrian explosion approximately 535 to 525 million years ago,

During the Cambrian explosion approximately 535 to 525 million years ago,

During the Cambrian explosion approximately 535 to 525 million years ago,
A) all modern species of animals suddenly appeared.
B) animals rapidly diversified in the oceans.
C) a massive volcanic eruption nearly wiped out life on Earth.
D) great forest

gerti   32   1 Reply

Calyboo

Which of the following options lists the major groups or genera from the fossil record in the ...

Which of the following options lists the major groups or genera from the fossil record in the ...

Which of the following options lists the major groups or genera from the fossil record in the correct order from earliest to most recent?

 

A) Australopithecus, Sahelanthropus, Homo
B) Sahelanthropus, Ardipithecus, Australopithecus, Homo
C) Ardipit

gerti   38   1 Reply

Dareksupreme

The mucus-producing cells that line the stomach

The mucus-producing cells that line the stomach

The mucus-producing cells that line the stomach
A) increase the surface of the stomach for faster digestion.
B) stimulate production of hydrochloric acid.
C) lubricate and protect the stomach lining.
D) move food upward in the stomach to prolong dige

gerti   38   1 Reply

Tifany

To be scientifically valid, a hypothesis must be

To be scientifically valid, a hypothesis must be

To be scientifically valid, a hypothesis must be
A) part of a theory.
B) controlled.
C) reasonable.
D) testable and falsifiable.

gerti   57   1 Reply

Ceren Celik

doing a project for bio TOPIC how to conserve..

doing a project for bio TOPIC how to conserve..

any cool ideas how to conserve water, paper, gas ect ? Thanks!

getsomelanaa   303   2 Replies

agelessperson

Size-dependent temperature and desiccation constraints on performance capacity:

Size-dependent temperature and desiccation constraints on performance capacity:

https://bbhosted.cuny.edu/bbcswebdav/pid-18108660-dt-content-rid-100052313_1/courses/BKL01_BIOL._1001_TEEB_1149_1/BC%20Biol%201001_F14_Paper1-HW_4-6%281%29.pdf

Size-dependent temperature and desiccation constraints on performance capacity:

getsomelanaa   451   1 Reply

padre

Spontaneus

Spontaneus

the cells of your body have Na+-K+-ATPases,
which use energy from ATP to pump Na+ out of the cell and K+ into the cell. One
result of this is that there is an electrochemical gradient of Na+ ions
across the plasma membrane, with more

gh1991   1124   1 Reply

sarah!

DNA AND PLASMID...help

DNA AND PLASMID...help

what is the difference between bacterial genomic dna that results in the precipitation of genomic DNA with proteins, leaving the plasmid in the supernatant?
-please n thanks

gh1991   773   1 Reply

bio_man

Calculate the amount of DNA present in your sample if the absorbance at 260 is 0.3

Calculate the amount of DNA present in your sample if the absorbance at 260 is 0.3

CALCulate the amount of DNA present iin your sample if the absorbance at 260 is 0.3

gh1991   2200   2 Replies

bio_man

DNA is killing me!

DNA is killing me!

what property of DNA allows it to be separated  by size using gel electrophoresis?

gh1991   780   1 Reply

bio_man

boil buffa

boil buffa

what is in the boil buffer that helps "break open" the bacterial cells??
-thanks =)

gh1991   932   1 Reply

bio_man

the ended non-sticky DNA :)

the ended non-sticky DNA :)

the blunt ended (non-sticky) segment of dna shows below has restriction sites I and II cut by the HindIII restriction enzyme, which creates restriction fragments A,B, and C. Draw a cartoon of what the bands would look like on the gel after restrictio

gh1991   1060   1 Reply

bio_man

SYNONYM!

SYNONYM!

what is a synonym for the word LIGAND  as in fatty acids can act as a LIGAND for TLR4?

gh1991   1180   3 Replies

bio_man

Adult mammalliaaa :)

Adult mammalliaaa :)

In an adult mammal, which chamber of the heart pushes blood through the pulmonary circuit, and which chamber pushes blood through the rest of the body?
Please n thanx!

gh1991   664   1 Reply

bio_man

DNA-- why so specific?

DNA-- why so specific?

1. E. coli DNA polymerase I has three enzymatic activities (listed below). Briefly
explain the role the each of these activities plays in DNA replication.
A. 5’-->3’ DNA polymerase activity

B. 5’-->3’ exonuclease activity

gh1991   1237   2 Replies

star

VISCERA-piggy piggy

VISCERA-piggy piggy

-contrast the cerebellum and cerebral cortex in therms of their governing roles?

- name 3 parts if the brain that you can see from dorsal view?

gh1991   670   1 Reply

bio_man

Hormone control helpo!!

Hormone control helpo!!

what does the pea mutation affect?

why are we studying pollen tube growth in a lab on hormones?

what is Rootone?

please helpe mey ... i always get stuck on these kind of problems

gh1991   961   1 Reply

Biology Forums

mRNA transcription and translation

mRNA transcription and translation

mRNA TRANSCRIPTASE TO TRNA TRANSLATION HELP

gh1991   1586   5 Replies

bio_man

Electric ladder

Electric ladder

In tube A you cut with HindIII. Tube B: Smal, Tube C: HindIII and Tube D: EcoRI and HindIII. show positive and negative electrodes and DNA ladder sizes from 2-24.

Please if someone can explain this process and how its done with the answer

gh1991   962   2 Replies

bio_man

competent

competent

what is chemically competent and electro competent, and what is their difference?
-thanks!

gh1991   487   1 Reply

star

HELP ASAPPPP flow

HELP ASAPPPP flow

starting from when blood enters the heart from the rest of the body, order the flow of blood from the heart back to the heart

carotid artery
aorta
pulmonary artery
right ventricle
jugular vein
left atrium
rig

gh1991   614   1 Reply

chemb

Please don't use google I just need the following in order. Thanx :)

Please don't use google I just need the following in order. Thanx :)

   
HELP ASAPPPP flow
« on: Today at 10:50:11 PM »   
starting from when blood enters the heart from the rest of the body, order the flow of blood from the heart back to the heart

carotid artery
aorta
pulmonary artery

gh1991   796   2 Replies

gh1991

spectrophotometer.. in BIO!

spectrophotometer.. in BIO!

if a culture of cells is in a salt solution, your blank measurment in the spectrophotometer would be with?

gh1991   1075   3 Replies

bio_man

If DNA was inflexible, why wouldnt enhancers work

If DNA was inflexible, why wouldnt enhancers work

if DNA was inflexible, why wouldnt enhancers work?

gh1991   709   1 Reply

bio_man

Help please Darwin theory, guppy spots, bioman! :)

Help please Darwin theory, guppy spots, bioman! :)

1)Below are two histograms showing guppy coloration in two different streams, Stream North and Stream South. Use these histograms to answer the first two questions.
Q1. Which spot brightness level is most heavily represented in Stream North?

12...56

gh1991   17056   77 Replies

Sylvia Okoroafor

Process of how a positive single strand of DNA makes a template

Process of how a positive single strand of DNA makes a template

1) i need help as to understanding the process of how a positive single strand of DNA makes a template thats a negative strands, etc until it reaches proteins, and then i need help understanding how a NEGATIVE single strand of DNA does the same proce

gh1991   475   1 Reply

bio_man

how to make atp?

how to make atp?

i know theres 2 ways of making atp, 1 is substrate level phosphorylation and the other is oxidative phosphorylation. what is the process of both, and what does the chemo-osmotic hypothesis have to do with any of it?

-thank you

gh1991   624   1 Reply

barry

pathways, glucose, enterdudroff

pathways, glucose, enterdudroff

how many precursor metabolites are the in the enterdoudroff pathway and whate are they?

same goes for the ppp(pentose phosphate pathway)?

gh1991   342   1 Reply

barry

Yeast cells help please

Yeast cells help please

What is the effect of yeast suspended in ethanol have on sodium sulfate or Mgco3? What metabolic activity will be shown?

gh1991   494   N/A

gh1991

help, simple question thank you!

help, simple question thank you!

What effect would Sodium Bicarbonate (NaHCO3) have on a yeast suspension in ethanol. would it cause the yeast to be more individual or cause them to clump up together?

gh1991   462   1 Reply

test123456789

tRna help please! thanks!

tRna help please! thanks!

is Amino-acyl trna synthetase the same thing as amp? i know you need an amino acyl trna synthetase to recharge a trna but in the picture attached i don't see the synthetase and was wondering if the AMP is that? thank you!

gh1991   344   1 Reply

padre

Alexander the Great avenged the earlier Persian invasion of Greece by

Alexander the Great avenged the earlier Persian invasion of Greece by

Alexander the Great avenged the earlier Persian invasion of Greece by

ghghgekvdbiidid   586   1 Reply

eurocoin

How are miRNA and siRNA different?

How are miRNA and siRNA different?

how are miRNA and siRNA different?

ghjghjf fsd   80   1 Reply

psyche360

How do insects do gas exchange?

How do insects do gas exchange?

I know that they have the tracheal system which involves the diffusion of oxygen directly from the atmosphere into the air-filled tubes. But can I have more info on this? Apparently there are problems with gas exchange with the exoskeleton of insects

gianmaranon   496   5 Replies

duddy