Assume that long ear lobes in humans are an autosomal dominant trait that exhibits 50% penetrance. A person who is heterozygous for long ear lobes mates with a person who is homozygous for normal ear lobes. What is the probability that their first child will have long ear lobes.

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#Question id: 3012

#SCPH05 I Biotechnology

Agar is a sulfated polymer

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#Question id: 7763

#SCPH28 | Zoology

Two major sources of mutation are radiation and reactive oxygen species (ROS).The reactive oxygen species hypothesis for aging postulates that 

1) Senescence results from the accumulation of DNA, lipid, and protein damage inflicted by ROS of mitochondrial origin; and

2) Mitochondria of long-lived species should produce high ROS than do mitochondria of short-lived species.

3) the capacity of mitochondria to consume ROS might distinguish long-lived species from short-lived species, rather than differences in ROS generation. 

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#Question id: 1088

#SCPH28 | Zoology

One of the major categories of receptors in the plasma membrane functions by forming dimers, adding phosphate groups, and then activating relay proteins. Which type does this?

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#Question id: 9172

#SCPH06 I Botany

Two plant species live in the same biome but on different continents. Although the two species are not at all closely related, they may appear quite similar as a result of ________.

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#Question id: 3036

#I Life Science/ Life Sciences Group – I-V

During which phase would penicillin, an antibiotic that inhibits cell-wall synthesis, be most effective?