Practice Questions

TLS Online TPP Program

#Question id: 1020

HIV/AIDS can be categorized as a new or emerging infectious disease. By putting it into this category, we are effectively saying that

#Unit 4. Cell Communication and Cell Signaling

this infection hasn't been observed in the human population prior to recent (approximately 50 years or sooner) outbreaks
this disease has been in susceptible populations for centuries, but has only recently achieved infection levels that became detectable.
the infectious agent is still evolving and changing, unlike with older, more established diseases such as plague or polio.
the disease has always been in susceptible populations and causing disease, but we lacked the technology to detect it.

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TLS Online TPP Program

#Question id: 31237

#Unit 2. Cellular Organization

If a cell in the G1 phase is fused with a cell in the S phase, then what will happens?

TLS Online TPP Program

#Question id: 4843

#Unit 8. Inheritance Biology

What is the maximum percentage of parental frequency between two genes?

TLS Online TPP Program

#Question id: 17267

#Unit 8. Inheritance Biology

In humans, albinism (unpigmented skin, hair, and eyes) is due to an enzymatic deficiency, and it is an autosomal recessive trait. Suppose that in a small country of one million people (“Generation 1”), there are 500 aa albinos and 9000 Aa heterozygous carriers. Estimate q, the frequency of allele a, in Generation 1. Show your calculations.

TLS Online TPP Program

#Question id: 33346

#Unit 2. Cellular Organization

Growth of an organism was monitored at regular intervals of times and shown in the graph below. Around what time is the rate of growth zero?

TLS Online TPP Program

#Question id: 12154

#Unit 10. Ecological Principles

What is true of two resources that act synergistically to determine the population growth of a particular species?