• Of the following four 15-bp double-stranded DNA sequences, which will have a higher melting temperature? (Note: only one strand is shown here) Choose the single best answer

  • CCCGCATCGCCATCG

  • CATCCTAGCGACTAT

  • CTATACGACATAGCC

  • AAATGCATACATCTT

The following data were collected as part of a study of coffee consumption among graduate students. The following reflect cups per day consumed:

3          4          6          8          2          1          0          2

1. Compute the sample mean.

2. Compute the sample standard deviation.

3. Compute the median.

4. Compute the first and third quartiles.

5. Which measure, the mean or median, is a better measure of a typical value? Justify.

6. Which measure, the standard deviation or the interquartile range, is a better measure of dispersion? Justify.

This is a list of some of the steps in the process of hearing a sound. Put them in cause-and-effect order from first to last.

A. K+ channels in the hair cell membranes open

B. The incus (ear bone) vibrates

C. The hair cell releases neurotransmitter

D. Pressure waves pass through the air in the ear canal

E. Afferent neurons transmit action potentials through the cochlear nerve

F. The hair cell membrane is depolarized

G. Pressure waves travel through the fluid in the cochlea

H. The tympanic membrane vibrates

I. Voltage-gated Ca2+ channels open

J. The stapes (ear bone) vibrates

K. Stereocilia in hair cells deflect (bend)

L. The malleus (ear bone) vibrates

M. The oval window vibrates

why does DNA when denatured not refold to its dsDNA form ?

Why Cyanobacteria uses 'light and dark cycle' to prevent oxygen inhibition on nitrogen fixation?

please explain it in detail using the below reaction equation.

N2+8H+8e+16ATP-> 2NH3+H2+16ATP

During vigorous exercise, how is skeletal muscle pyruvate dehydrogenase regulated to increase its level of activity?

In your response include metabolites that affect PDH kinase and therefore the activity of PDH.

Both D-glucose and maltose (a disaccharide composed of two glucose residues) can be used as carbon sources by Escherichia coli. However, D-glucose is taken up by an example of the sugar phosphotransferase system and maltose is taken up by an example of an ABC transporter system. What are the differences between these systems? What are their protein components? What is the source of energy for accumulation of the sugar against a concentration gradient? In which form does the sugar appear in the cell?

Background information In this lab, you will test the hypothesis that the evolution of skull shape within the human lineage took place largely by changing the timing of events in development from a chimpanzee-like ancestor. The change in shape during development (that is, allometry) is a source of heritable variation that can lead to adaptive evolution. In this lab, we’re focusing on how morphology (the shape of an organism) changes through time instead of focusing on how genes change through time. However, these two biological disciplines are united in the study of evolutionary development, or “evo-devo” for short (Carroll 2005). Growth from fertilized egg (zygote) to adult involves a host of complex interactions among genes, molecules, and tissues. Subtle alterations in the timing of gene expression, especially for regulatory genes, can have far-reaching consequences that result in different adult morphology (Carroll 2005).

1. Read the of the above information, and then paraphrase the primary hypothesis you will test in this lab. Next, represent this hypothesis as a schematic (concept map), by drawing what you think the ancestral skull looked like and how the shape of the skull evolved in descendent species.

difference between 19th century marriage by Kate chopin and todays marriage

1. What is an infectious dose? Would a more virulent organism have a higher or lower infectious dose? What can affect the infectious dose of a microbe?

Relate the concepts of population ecology, including population distributions, growth curves, and species interactions to the recent coronavirus pandemic. In your answer, relate recent patterns of COVID-19 and predict future patterns based on reasoning from these concepts. Your answer should demonstrate your understanding of population ecology.

In ELISA, what is the purpose of blocking the well with something like the Bovine Serum Albumen? Is it to prevent the primary antibodies from binding to the well? If so, why would the primary antibodies bind to the well instead of the antigen ?

Answer the following questions with respect to transcription:

• What is the template?
• What is the name of the enzyme that synthesizes the RNA?