Answer the following question given this paragraph: Structure of the trp operon. The trp operon is composed of 5 structural genes, 1 regulatory gene and other regulatory sequences, including the promoter, operator and leader sequence. Within the leader sequence is the attenuator region. In the presence of tryptophan, the structural genes are not transcribed. Q: What happens to structural genes in the presence of tryptophan? Choices: - they are not oxidised - they are transcribed - they are exterminated - they are not transcribed A:
they are not transcribed
(Question)
Answer the following question given this paragraph: Accidentally introduced in the 1900s, the fungus decimated elm trees across the continent. Many European and Asiatic elms are less susceptible to Dutch elm disease than American elms. In humans, fungal infections are generally considered challenging to treat. Unlike bacteria, fungi do not respond to traditional antibiotic therapy, since they are eukaryotes. Fungal infections may prove deadly for individuals with compromised immune systems. Fungi have many commercial applications. The food industry uses yeasts in baking, brewing, and cheese and wine making. Many industrial compounds are byproducts of fungal fermentation. Fungi are the source of many commercial enzymes and antibiotics. Q: Many european and asiatic elms are less susceptible to dutch elm disease than which elms? Choices: - caribbean - rican - african - american A:
(Answer)
american
Ques: Answer the following question given this paragraph: Q: What type of response do signal transductions within target cells bring about? Choices: - resporatory - bacterial - psychological - physiological A:
Ans: physiological
(Q).
Answer the following question given this paragraph: 27.2 Features Used to Classify Animals Organisms in the animal kingdom are classified based on their body morphology and development. True animals are divided into those with radial versus bilateral symmetry. Generally, the simpler and often non-motile animals display radial symmetry. Animals with radial symmetry are also generally characterized by the development of two embryological germ layers, the endoderm and ectoderm, whereas animals with bilateral symmetry are generally characterized by the development of a third embryological germ layer, the mesoderm. Animals with three germ layers, called triploblasts, are further characterized by the presence or absence of an internal body cavity called a coelom. The presence of a coelom affords many advantages, and animals with a coelom may be termed true coelomates or pseudocoelomates, depending on which tissue gives rise to the coelom. Coelomates are further divided into one of two groups called protostomes and deuterostomes, based on a number of developmental characteristics, including differences in zygote cleavage and method of coelom formation. Q: True animals are divided into those with radial versus bilateral styles of what? Choices: - attracted - molecular - magnetic - symmetry A:
(A).
symmetry
Ques:Answer the following question given this paragraph: Many lakes are not natural, but are human-made. People dam a stream in a suitable spot. Water backs up behind the dam, creating a lake. These lakes are "reservoirs" ( Figure below ). Q: A man made lake is known as what? Choices: - Pond - Lake - Lagoon - resevoirs A:

Ans:resevoirs
Answer the following question given this paragraph: Space may seem empty, but actually it contains thinly spread gas and dust, called interstellar medium, that gradually collapses over immense stretches of time and collects into denser clouds of gas and dust. The atoms of gas are mostly hydrogen and are typically about a centimeter apart. The dust is mostly carbon and silicon. In some places, this interstellar medium is collected into particularly dense clouds of gas and dust known as a nebula . A nebula is the birthplace of stars. Our sun was probably born in a nebula around 5 billion years ago. Q: What does interstellar medium consist of? Choices: - gravitational waves - the strong force - dark matter - thinly spread gas and dust A:
thinly spread gas and dust