Tag Archives: Biology

Phosphorylation of Glucose

The first step of glycolysis is the phosphorylation of one molecule of glucose to generate glucose 6-phosphate. This reaction:

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Initiate Uptake of Plasmids

Which of the following is a method for initiating the uptake of a plasmid into a target eukaryotic cell?

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Synthesis of Hormones

A researcher is interested in studying the synthesis of peptide and steroid hormones. She harvests 5 samples of cells from different hormone-producing organs of the body and allows each sample of cells (Cell Types 1-5) to synthesize its hormones for a period of time. Afterwards, she measures the intracellular concentration of the hormones synthesized in each Cell Type. The results are displayed in the corresponding chart. Based on the information provided, where would Cell Type 2 possibly be found in the human body?

HormoneChart.png

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Resting Potential of a Neuron

The resting potential of a neuron arises due to which of the following?

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What’s My Name Again

DNA that is synthesized from messenger RNA molecules and used to recreate the genomic library is commonly referred to as, which of the following?

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Pump It Up

The Na+/K+ pump maintains the resting potential of the cell membrane. In order to fulfill this task the pump:

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Insulin in Beta Cells

The picture below depicts the events that lead to insulin secretion from pancreatic beta cells.
VDCC

*KATP channel- ATP-sensitive K+ channel; VDCC- voltage-dependent Ca2+ channel

Which of the following statements holds true:

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Special Experiment

An experiment is done using a special chemical that includes methylene blue, a compound that turns blue in the presence of oxygen. Three test tubes containing various plant cells exposed to different levels of light are observed over 3 days. Each day the test tube was placed in a photospectrometer and the light transmittance were recorded in the following table.

Which of the following is a possible explanation for the percent transmittance reported for Plant Cell 2?

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Bobble Wobble

Scientists performed a mutational analysis of gene X. The gene X is a transcription factor involved in the cell cycle control. The aim of the study was to address a question of whether mutations in the gene had an impact on the development of cancer. Overall, five mutations were detected. Analysis of the results showed that some of the mutations had no effect on cancer behavior. The table below contains some basic information about mutations.


Which of the following mutations has/have no effect on cancer development?

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Photo attributed to i eated a cookie.

Gastrin Secretion

Which of the following statements is NOT true regarding gastrin secretion and function?

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Photo attributed to kashyap_hc.