Topic
Q:
Post-transcriptional modification of hnRNA involves all of the following except
(A) Addition of 7 -methylguanosine triphosphate cap
(B) Addition of polyadenylate tail
(C) Insertion of nucleotides
(D) Deletion of introns
Q:
Heterogeneous nuclear RNA is the precursor of
(A) mRNA
(B) rRNA
(C) tRNA
(D) None of these
Q:
A species of endangered tigers has a population in 2023 of
about 900, and that number is expected to decline by about
\( 6 \% \) each year. If this rate continues, what would we predict
the tiger population to be in 2034?
\( \square \) tigers
Q:
After introducing 79 specimen of spotted woodpecker into
Hatchikapatchi state park, their population is expected to
quadruple every 15 years. According to this model how
many years pass since their introduction into the park
before the population reaches 661 members?
\( t=\square \)
Q:
Г) удвоение молекулы ДНК
С1 Прочитайте текст и найдите в нём предложения, в которых содержатся биологические ошибки.
Запишите сначала номера этих предложений, а затем сформулируйте эти предложения правильно.
1. Большое значение в строении и жизнедеятельности организмов имеют белки.
2. Это биополимеры, мономерами которых являются азотистые основания.
3. Белки входят в состав плазматической мембраны.
4. Многие белки выполняют в клетке ферментативную функцию.
5. В молекулах белка зашифрована наследственная информация о признаках организма.
6. Молекулы белка и т-РНК входят в состав рибосом.
Q:
a. ¿Qué avances se han logrado en términos de diversidad, equidad e inclusión en la microbiología
en los últimos años? Presenta al menos 3 ejemplos.
b. Referencias
Q:
A student investigated density of an egg, water and salt water. The
picture shows what the student saw when she placed the eggs into the
glasses of water.
Q:
Calculate: You can use your data to estimate the duration of each phase of the cell cycle.
For example, if \( 8 \% \) of the cells were in prophase and the cell cycle was 10 hours long, then
prophase would last \( 8 \% \) of 10 hours, or 0.8 hours ( 48 minutes).
Use percentages to estimate the duration of each phase of the cell cycle. Show your work.
Interphase:
Prophase:
Metaphase:
Anaphase:
Telophase:
Cytokinesis:
Q:
Suppose that during normal respiration, the volume of air inhaled per breath (called "tidal volume") by a mammal of any size is 6.55 mL per kilogram of body
mass.
(a) Write a function representing the tidal volume \( T(x) \) (in mL ) of a mammal of mass \( x \) (in kg).
(b) Write an equation for \( T^{-1}(x) \).
(c) Find \( T^{-1}(169) \) and interpret its meaning in context. Round to the nearest whole unit.
Q:
3. The liver produces bile. How does bile help in digestion of food?
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