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TLS Online TPP Program

#Question id: 5220

In comparing the genomes of humans and those of other higher primates, it is seen that humans have a large metacentric pair we call chromosome #2 among our 46 chromosomes, while the other primates of this group have 48 chromosomes and any pair like the human #2 pair is not present; instead the primate groups each have two pairs of midsize acrocentric chromosomes. What is the most likely explanation?

#Unit 11. Evolution and Behavior

  1. The ancestral organism had 48 chromosomes and at some point a centric fusion event occurred and provided some selective advantage.

  2. The ancestral organism had 46 chromosomes, but primates evolved when one of the pairs broke in half.

  3. At some point in evolution, human ancestors and primate ancestors were able to mate and produce fertile offspring, making a new species.

  4. Chromosome breakage results in additional centromeres being made in order for meiosis to proceed successfully.

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TLS Online TPP Program

#Question id: 11787

#Unit 7. System Physiology – Animal

Giving prostaglandin E2 (PGE2) to a pregnant woman may result in an abortion. What is the best explanation for this finding?
TLS Online TPP Program

#Question id: 11788

#Unit 7. System Physiology – Animal

During the first few years after menopause, follicle-stimulating hormone (FSH) levels are normally extremely high. A 56-year-old woman completed menopause 3 years ago. However, she is found to have low levels of FSH in her blood. Which of the following is the best explanation for this finding?
TLS Online TPP Program

#Question id: 11789

#Unit 1. Molecules and their Interaction Relevant to Biology

Starch is made up of amylose and amylopectin having (α1→4) and (α1→6) bonds, hence molecule have
TLS Online TPP Program

#Question id: 11790

#Unit 1. Molecules and their Interaction Relevant to Biology

Chitin is a polysaccharide
TLS Online TPP Program

#Question id: 11791

#Unit 1. Molecules and their Interaction Relevant to Biology

Cellulose act as hydrophobic molecule due to
TLS Online TPP Program

#Question id: 11792

#Unit 1. Molecules and their Interaction Relevant to Biology

Hyaluronic acid is an important glycosaminoglycan component of connective tissue. Hyaluronate molecules are composed of
A. D-glucuronic acid and N-acetyl-D-glucosamine
B. D-galactose and N-acetyl-D-glucosamine
C. β(1→4) and β(1→3) alternate linkages
D. β(1→4) and β(1→6) alternate linkages
Which of the above 2 combinations are correct